element\", () => {\n // https://on.cypress.io/select\n\n // at first, no option should be selected\n cy.get(\".action-select\").should(\"have.value\", \"--Select a fruit--\");\n\n // Select option(s) with matching text content\n cy.get(\".action-select\").select(\"apples\");\n // confirm the apples were selected\n // note that each value starts with \"fr-\" in our HTML\n cy.get(\".action-select\").should(\"have.value\", \"fr-apples\");\n\n cy.get(\".action-select-multiple\")\n .select([\"apples\", \"oranges\", \"bananas\"])\n // when getting multiple values, invoke \"val\" method first\n .invoke(\"val\")\n .should(\"deep.equal\", [\"fr-apples\", \"fr-oranges\", \"fr-bananas\"]);\n\n // Select option(s) with matching value\n cy.get(\".action-select\")\n .select(\"fr-bananas\")\n // can attach an assertion right away to the element\n .should(\"have.value\", \"fr-bananas\");\n\n cy.get(\".action-select-multiple\")\n .select([\"fr-apples\", \"fr-oranges\", \"fr-bananas\"])\n .invoke(\"val\")\n .should(\"deep.equal\", [\"fr-apples\", \"fr-oranges\", \"fr-bananas\"]);\n\n // assert the selected values include oranges\n cy.get(\".action-select-multiple\")\n .invoke(\"val\")\n .should(\"include\", \"fr-oranges\");\n });\n\n it(\".scrollIntoView() - scroll an element into view\", () => {\n // https://on.cypress.io/scrollintoview\n\n // normally all of these buttons are hidden,\n // because they're not within\n // the viewable area of their parent\n // (we need to scroll to see them)\n cy.get(\"#scroll-horizontal button\").should(\"not.be.visible\");\n\n // scroll the button into view, as if the user had scrolled\n cy.get(\"#scroll-horizontal button\")\n .scrollIntoView()\n .should(\"be.visible\");\n\n cy.get(\"#scroll-vertical button\").should(\"not.be.visible\");\n\n // Cypress handles the scroll direction needed\n cy.get(\"#scroll-vertical button\")\n .scrollIntoView()\n .should(\"be.visible\");\n\n cy.get(\"#scroll-both button\").should(\"not.be.visible\");\n\n // Cypress knows to scroll to the right and down\n cy.get(\"#scroll-both button\")\n .scrollIntoView()\n .should(\"be.visible\");\n });\n\n it(\".trigger() - trigger an event on a DOM element\", () => {\n // https://on.cypress.io/trigger\n\n // To interact with a range input (slider)\n // we need to set its value & trigger the\n // event to signal it changed\n\n // Here, we invoke jQuery's val() method to set\n // the value and trigger the 'change' event\n cy.get(\".trigger-input-range\")\n .invoke(\"val\", 25)\n .trigger(\"change\")\n .get(\"input[type=range]\")\n .siblings(\"p\")\n .should(\"have.text\", \"25\");\n });\n\n it(\"cy.scrollTo() - scroll the window or element to a position\", () => {\n // https://on.cypress.io/scrollTo\n\n // You can scroll to 9 specific positions of an element:\n // -----------------------------------\n // | topLeft top topRight |\n // | |\n // | |\n // | |\n // | left center right |\n // | |\n // | |\n // | |\n // | bottomLeft bottom bottomRight |\n // -----------------------------------\n\n // if you chain .scrollTo() off of cy, we will\n // scroll the entire window\n cy.scrollTo(\"bottom\");\n\n cy.get(\"#scrollable-horizontal\").scrollTo(\"right\");\n\n // or you can scroll to a specific coordinate:\n // (x axis, y axis) in pixels\n cy.get(\"#scrollable-vertical\").scrollTo(250, 250);\n\n // or you can scroll to a specific percentage\n // of the (width, height) of the element\n cy.get(\"#scrollable-both\").scrollTo(\"75%\", \"25%\");\n\n // control the easing of the scroll (default is 'swing')\n cy.get(\"#scrollable-vertical\").scrollTo(\"center\", { easing: \"linear\" });\n\n // control the duration of the scroll (in ms)\n cy.get(\"#scrollable-both\").scrollTo(\"center\", { duration: 2000 });\n });\n});\n"
},
{
"path": "chapter11/1_writing_end_to_end_tests/1_setting_up_cypress/cypress/integration/examples/aliasing.spec.js",
"content": "/// element in various ways\n .should(\"have.text\", \"Column content\")\n .should(\"contain\", \"Column content\")\n .should(\"have.html\", \"Column content\")\n // chai-jquery uses \"is()\" to check if element matches selector\n .should(\"match\", \"td\")\n // to match text content against a regular expression\n // first need to invoke jQuery method text()\n // and then match using regular expression\n .invoke(\"text\")\n .should(\"match\", /column content/i);\n\n // a better way to check element's text content against a regular expression\n // is to use \"cy.contains\"\n // https://on.cypress.io/contains\n cy.get(\".assertion-table\")\n .find(\"tbody tr:last\")\n // finds first element with text content matching regular expression\n .contains(\"td\", /column content/i)\n .should(\"be.visible\");\n\n // for more information about asserting element's text\n // see https://on.cypress.io/using-cypress-faq#How-do-I-get-an-elementβs-text-contents\n });\n\n it(\".and() - chain multiple assertions together\", () => {\n // https://on.cypress.io/and\n cy.get(\".assertions-link\")\n .should(\"have.class\", \"active\")\n .and(\"have.attr\", \"href\")\n .and(\"include\", \"cypress.io\");\n });\n });\n\n describe(\"Explicit Assertions\", () => {\n // https://on.cypress.io/assertions\n it(\"expect - make an assertion about a specified subject\", () => {\n // We can use Chai's BDD style assertions\n expect(true).to.be.true;\n const o = { foo: \"bar\" };\n\n expect(o).to.equal(o);\n expect(o).to.deep.equal({ foo: \"bar\" });\n // matching text using regular expression\n expect(\"FooBar\").to.match(/bar$/i);\n });\n\n it(\"pass your own callback function to should()\", () => {\n // Pass a function to should that can have any number\n // of explicit assertions within it.\n // The \".should(cb)\" function will be retried\n // automatically until it passes all your explicit assertions or times out.\n cy.get(\".assertions-p\")\n .find(\"p\")\n .should($p => {\n // https://on.cypress.io/$\n // return an array of texts from all of the p's\n // @ts-ignore TS6133 unused variable\n const texts = $p.map((i, el) => Cypress.$(el).text());\n\n // jquery map returns jquery object\n // and .get() convert this to simple array\n const paragraphs = texts.get();\n\n // array should have length of 3\n expect(paragraphs, \"has 3 paragraphs\").to.have.length(3);\n\n // use second argument to expect(...) to provide clear\n // message with each assertion\n expect(paragraphs, \"has expected text in each paragraph\").to.deep.eq([\n \"Some text from first p\",\n \"More text from second p\",\n \"And even more text from third p\"\n ]);\n });\n });\n\n it(\"finds element by class name regex\", () => {\n cy.get(\".docs-header\")\n .find(\"div\")\n // .should(cb) callback function will be retried\n .should($div => {\n expect($div).to.have.length(1);\n\n const className = $div[0].className;\n\n expect(className).to.match(/heading-/);\n })\n // .then(cb) callback is not retried,\n // it either passes or fails\n .then($div => {\n expect($div, \"text content\").to.have.text(\"Introduction\");\n });\n });\n\n it(\"can throw any error\", () => {\n cy.get(\".docs-header\")\n .find(\"div\")\n .should($div => {\n if ($div.length !== 1) {\n // you can throw your own errors\n throw new Error(\"Did not find 1 element\");\n }\n\n const className = $div[0].className;\n\n if (!className.match(/heading-/)) {\n throw new Error(`Could not find class \"heading-\" in ${className}`);\n }\n });\n });\n\n it(\"matches unknown text between two elements\", () => {\n /**\n * Text from the first element.\n * @type {string}\n */\n let text;\n\n /**\n * Normalizes passed text,\n * useful before comparing text with spaces and different capitalization.\n * @param {string} s Text to normalize\n */\n const normalizeText = s => s.replace(/\\s/g, \"\").toLowerCase();\n\n cy.get(\".two-elements\")\n .find(\".first\")\n .then($first => {\n // save text from the first element\n text = normalizeText($first.text());\n });\n\n cy.get(\".two-elements\")\n .find(\".second\")\n .should($div => {\n // we can massage text before comparing\n const secondText = normalizeText($div.text());\n\n expect(secondText, \"second text\").to.equal(text);\n });\n });\n\n it(\"assert - assert shape of an object\", () => {\n const person = {\n name: \"Joe\",\n age: 20\n };\n\n assert.isObject(person, \"value is object\");\n });\n\n it(\"retries the should callback until assertions pass\", () => {\n cy.get(\"#random-number\").should($div => {\n const n = parseFloat($div.text());\n\n expect(n)\n .to.be.gte(1)\n .and.be.lte(10);\n });\n });\n });\n});\n"
},
{
"path": "chapter11/1_writing_end_to_end_tests/1_setting_up_cypress/cypress/integration/examples/connectors.spec.js",
"content": "/// \n */\n function waitOneSecond() {\n // return a promise that resolves after 1 second\n // @ts-ignore TS2351 (new Cypress.Promise)\n return new Cypress.Promise((resolve, reject) => {\n setTimeout(() => {\n // set waited to true\n waited = true;\n\n // resolve with 'foo' string\n resolve(\"foo\");\n }, 1000);\n });\n }\n\n cy.then(() => {\n // return a promise to cy.then() that\n // is awaited until it resolves\n // @ts-ignore TS7006\n return waitOneSecond().then(str => {\n expect(str).to.eq(\"foo\");\n expect(waited).to.be.true;\n });\n });\n });\n});\n"
},
{
"path": "chapter11/1_writing_end_to_end_tests/1_setting_up_cypress/cypress/integration/examples/viewport.spec.js",
"content": "/// Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n\n Undo \n\n \n \n\n"
},
{
"path": "chapter11/client/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst API_ADDR = \"http://localhost:3000\";\n\nconst addItem = (itemName, quantity) => {\n const { client } = require(\"./socket\");\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n\n fetch(`${API_ADDR}/inventory/${itemName}`, {\n method: \"POST\",\n headers: {\n \"Content-Type\": \"application/json\",\n \"x-socket-client-id\": client.id\n },\n body: JSON.stringify({ quantity })\n });\n\n return data.inventory;\n};\n\nmodule.exports = { API_ADDR, data, addItem };\n"
},
{
"path": "chapter11/client/inventoryController.test.js",
"content": "const nock = require(\"nock\");\nconst { API_ADDR, addItem, data } = require(\"./inventoryController\");\nconst { start, stop } = require(\"./testSocketServer\");\nconst { client, connect } = require(\"./socket\");\n\nafterEach(() => {\n if (!nock.isDone()) {\n nock.cleanAll();\n throw new Error(\"Not all mocked endpoints received requests.\");\n }\n});\n\ndescribe(\"addItem\", () => {\n beforeEach(() => (data.inventory = {}));\n\n test(\"adding new items to the inventory\", () => {\n // Respond to all post requests\n // to POST /inventory/:itemName\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n\n test(\"sending requests when adding new items\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 5 }))\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n });\n\n describe(\"live-updates\", () => {\n beforeAll(start);\n\n beforeAll(async () => {\n nock.cleanAll();\n await connect();\n });\n\n afterAll(stop);\n\n test(\"sending a x-socket-client-id header\", () => {\n const clientId = client.id;\n\n nock(API_ADDR, { reqheaders: { \"x-socket-client-id\": clientId } })\n .post(/inventory\\/.*$/)\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n });\n });\n});\n"
},
{
"path": "chapter11/client/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\n \"/setupGlobalFetch.js\",\n \"/setupJestDom.js\"\n ]\n};\n"
},
{
"path": "chapter11/client/main.js",
"content": "const { connect } = require(\"./socket\");\n\nconst {\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate,\n updateItemList\n} = require(\"./domController\");\n\nconst { API_ADDR, data } = require(\"./inventoryController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\nconst undoButton = document.getElementById(\"undo-button\");\nundoButton.addEventListener(\"click\", handleUndo);\n\nwindow.addEventListener(\"popstate\", handlePopstate);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n\nconst loadInitialData = async () => {\n try {\n const inventoryResponse = await fetch(`${API_ADDR}/inventory`);\n data.inventory = await inventoryResponse.json();\n return updateItemList(data.inventory);\n } catch (e) {\n // Restore the inventory if the request fails\n const storedInventory = JSON.parse(localStorage.getItem(\"inventory\"));\n\n if (storedInventory) {\n data.inventory = storedInventory;\n updateItemList(data.inventory);\n }\n }\n};\n\nconnect();\n\nmodule.exports = loadInitialData();\n"
},
{
"path": "chapter11/client/main.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText, fireEvent } = require(\"@testing-library/dom\");\nconst { API_ADDR } = require(\"./inventoryController\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils.js\");\n\nbeforeEach(clearHistoryHook);\n\nbeforeEach(() => localStorage.clear());\n\nbeforeEach(async () => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n\n nock(API_ADDR)\n .get(\"/inventory\")\n .replyWithError({ code: 500 });\n await require(\"./main\");\n\n // You can only spy on `window.addEventListener` after `main.js`\n // has been executed. Otherwise `detachPopstateHandlers` will\n // also detach the handlers that `main.js` attached to the page.\n jest.spyOn(window, \"addEventListener\");\n});\n\nafterEach(detachPopstateHandlers);\n\nafterEach(() => {\n if (!nock.isDone()) {\n nock.cleanAll();\n throw new Error(\"Not all mocked endpoints received requests.\");\n }\n});\n\ntest(\"persists items between sessions\", async () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n nock(API_ADDR)\n .get(\"/inventory\")\n .replyWithError({ code: 500 });\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemListBefore = document.getElementById(\"item-list\");\n expect(itemListBefore.childNodes).toHaveLength(1);\n expect(\n getByText(itemListBefore, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n\n // This is equivalent to reloading the page\n document.body.innerHTML = initialHtml;\n jest.resetModules();\n\n await require(\"./main\");\n\n const itemListAfter = document.getElementById(\"item-list\");\n expect(itemListAfter.childNodes).toHaveLength(1);\n expect(\n getByText(itemListAfter, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n});\n\ndescribe(\"adding items\", () => {\n test(\"updating the item list\", () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n\n test(\"sending a request to update the item list\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 6 }))\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n if (!nock.isDone())\n throw new Error(\"POST /inventory/cheesecake was not reached\");\n });\n\n test(\"undo to one item\", done => {\n // You must specify the encoded URL here because\n // nock struggles with encoded urls\n nock(API_ADDR)\n .post(\"/inventory/carrot%20cake\")\n .reply(200);\n\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\")\n .reply(200);\n\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n fireEvent.input(itemField, {\n target: { value: \"carrot cake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"5\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.children).toHaveLength(1);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n\n test(\"undo to empty list\", done => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList).toBeEmpty();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, { target: { value: \"book\" }, bubbles: true });\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter11/client/package.json",
"content": "{\n \"name\": \"1_http_requests\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\",\n \"nock\": \"^12.0.3\",\n \"socket.io\": \"^2.3.0\"\n },\n \"dependencies\": {\n \"http-shutdown\": \"^1.2.2\",\n \"socket.io-client\": \"^2.3.0\"\n }\n}\n"
},
{
"path": "chapter11/client/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter11/client/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter11/client/socket.js",
"content": "const { API_ADDR, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\nconst client = { id: null };\n\nconst io = require(\"socket.io-client\");\n\nconst handleAddItemMsg = ({ itemName, quantity }) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return updateItemList(data.inventory);\n};\n\nconst connect = () => {\n return new Promise(resolve => {\n const socket = io(API_ADDR);\n\n socket.on(\"connect\", () => {\n client.id = socket.id;\n resolve(socket);\n });\n\n socket.on(\"add_item\", handleAddItemMsg);\n });\n};\n\nmodule.exports = { client, connect, handleAddItemMsg };\n"
},
{
"path": "chapter11/client/socket.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText } = require(\"@testing-library/dom\");\nconst { data } = require(\"./inventoryController\");\nconst { start, stop, sendMsg } = require(\"./testSocketServer\");\n\nconst { handleAddItemMsg, connect } = require(\"./socket\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\nbeforeEach(() => {\n data.inventory = {};\n});\n\ndescribe(\"handleAddItemMsg\", () => {\n test(\"updating the inventory and the item list\", () => {\n handleAddItemMsg({ itemName: \"cheesecake\", quantity: 6 });\n\n expect(data.inventory).toEqual({ cheesecake: 6 });\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(1);\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"handling real messages\", () => {\n beforeAll(start);\n\n beforeAll(async () => {\n nock.cleanAll();\n await connect();\n });\n\n afterAll(stop);\n\n test(\"handling add_item messages\", async () => {\n sendMsg(\"add_item\", { itemName: \"cheesecake\", quantity: 6 });\n\n await new Promise(resolve => setTimeout(resolve, 1000));\n\n expect(data.inventory).toEqual({ cheesecake: 6 });\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(1);\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter11/client/testSocketServer.js",
"content": "const server = require(\"http\").createServer();\nconst io = require(\"socket.io\")(server);\n\nconst sendMsg = (msgType, content) => {\n io.sockets.emit(msgType, content);\n};\n\nconst start = () =>\n new Promise(resolve => {\n server.listen(3000, resolve);\n });\n\nconst stop = () =>\n new Promise(resolve => {\n server.close(resolve);\n });\n\nmodule.exports = { start, stop, sendMsg };\n"
},
{
"path": "chapter11/client/testUtils.js",
"content": "const clearHistoryHook = done => {\n const clearHistory = () => {\n if (history.state === null) {\n window.removeEventListener(\"popstate\", clearHistory);\n return done();\n }\n\n history.back();\n };\n\n window.addEventListener(\"popstate\", clearHistory);\n\n clearHistory();\n};\n\nconst detachPopstateHandlers = () => {\n const popstateListeners = window.addEventListener.mock.calls.filter(\n ([eventName]) => {\n return eventName === \"popstate\";\n }\n );\n\n popstateListeners.forEach(([eventName, handlerFn]) => {\n window.removeEventListener(eventName, handlerFn);\n });\n\n jest.restoreAllMocks();\n};\n\nmodule.exports = { clearHistoryHook, detachPopstateHandlers };\n"
},
{
"path": "chapter11/server/README.md",
"content": "# Chapter 5 Server\n\nTo better support the client-side application we'll build on Chapter 5, I've had to do a few updates to the server from Chapter 4.\n\nIn case you want to update the back-end from Chapter 4 yourself, here's the list of changes I've done:\n\n- For the server to accept the requests coming from the client, you'll need to use [`@koa/cors`](https://github.com/koajs/cors)\n- To enable running tests while the server is running, I bind it to different ports depending on whether I am in a test or development environment.\n- At `POST /inventory/:itemName` I have added a route which adds an item to the inventory. It takes a `body` containing the `quantity` to add.\n- At `GET /inventory` I have added a route which lists all items in the inventory.\n- At `DELETE /inventory/:itemName` I have added a route which let's you delete inventory items so that you can use to fix the `undo` functionality\n- I've used `koa-socket-2` to add support for `socket.io`\n- The `POST /inventory/:itemName` will now push updates to all clients but the one which added an item.\n"
},
{
"path": "chapter11/server/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter11/server/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter11/server/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .update({ updatedAt: new Date().toISOString() })\n .where({\n userId: itemEntry.userId,\n itemName\n });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1,\n updatedAt: new Date().toISOString()\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nconst hoursInMs = n => 1000 * 60 * 60 * n;\n\nconst removeStaleItems = async () => {\n const fourHoursAgo = new Date(Date.now() - hoursInMs(4)).toISOString();\n\n const staleItems = await db\n .select()\n .from(\"carts_items\")\n .where(\"updatedAt\", \"<\", fourHoursAgo);\n\n if (staleItems.length === 0) return;\n\n // Put stale items back in the inventory\n const inventoryUpdates = staleItems.map(staleItem =>\n db(\"inventory\")\n .increment(\"quantity\", staleItem.quantity)\n .where({ itemName: staleItem.itemName })\n );\n await Promise.all(inventoryUpdates);\n\n // Delete stale items from cart\n const staleItemTuples = staleItems.map(i => [i.itemName, i.userId]);\n await db(\"carts_items\")\n .del()\n .whereIn([\"itemName\", \"userId\"], staleItemTuples);\n};\n\nconst monitorStaleItems = () => setInterval(removeStaleItems, hoursInMs(2));\n\nmodule.exports = { addItemToCart, monitorStaleItems };\n"
},
{
"path": "chapter11/server/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart, monitorStaleItems } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst FakeTimers = require(\"@sinonjs/fake-timers\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n\nconst withRetries = async fn => {\n // Capture the assertion error since Jest does not export it\n const JestAssertionError = (() => {\n try {\n expect(false).toBe(true);\n } catch (e) {\n return e.constructor;\n }\n })();\n\n try {\n await fn();\n } catch (e) {\n if (e.constructor === JestAssertionError) {\n // Wait 100ms before retrying\n await new Promise(resolve => setTimeout(resolve, 100));\n await withRetries(fn);\n } else {\n throw e;\n }\n }\n};\n\ndescribe(\"timers\", () => {\n const hoursInMs = n => 1000 * 60 * 60 * n;\n\n let clock;\n beforeEach(() => {\n clock = FakeTimers.install({ toFake: [\"Date\", \"setInterval\"] });\n });\n\n afterEach(() => {\n clock = clock.uninstall();\n });\n\n test(\"removing stale items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n clock.tick(hoursInMs(4));\n timer = monitorStaleItems();\n clock.tick(hoursInMs(2));\n\n await withRetries(async () => {\n const finalCartContent = await db\n .select()\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n });\n\n await withRetries(async () => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\");\n\n expect(inventoryContent).toEqual([\n { itemName: \"cheesecake\", quantity: 1 }\n ]);\n });\n });\n});\n"
},
{
"path": "chapter11/server/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst db = require(\"knex\")(require(\"./knexfile\")[environmentName]);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter11/server/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter11/server/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter11/server/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter11/server/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter11/server/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter11/server/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter11/server/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter11/server/migrations/20200331210311_updatedAt_field.js",
"content": "exports.up = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.timestamp(\"updatedAt\");\n });\n};\n\nexports.down = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.dropColumn(\"updatedAt\");\n });\n};\n"
},
{
"path": "chapter11/server/package.json",
"content": "{\n \"name\": \"chapter5_server\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\",\n \"start\": \"cross-env NODE_ENV=development node server.js\",\n \"migrate:dev\": \"knex migrate:latest --env development\",\n \"seed:dev\": \"knex seed:run\"\n },\n \"devDependencies\": {\n \"@sinonjs/fake-timers\": \"github:sinonjs/fake-timers\",\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"@koa/cors\": \"^3.0.0\",\n \"cross-env\": \"^7.0.2\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"koa-socket-2\": \"^1.2.0\",\n \"nock\": \"^12.0.3\",\n \"socket.io\": \"^2.3.0\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"main\": \"alertController.spec.js\",\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"description\": \"\"\n}\n"
},
{
"path": "chapter11/server/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter11/server/seeds/initial_inventory.js",
"content": "exports.seed = async knex => {\n await knex(\"inventory\").del();\n return knex(\"inventory\").insert([\n { itemName: \"cheesecake\", quantity: 8 },\n { itemName: \"apple pie\", quantity: 2 },\n { itemName: \"carrot cake\", quantity: 5 }\n ]);\n};\n"
},
{
"path": "chapter11/server/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst http = require(\"http\");\nconst IO = require(\"koa-socket-2\");\nconst cors = require(\"@koa/cors\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst PORT = process.env.NODE_ENV === \"test\" ? 5000 : 3000;\n\nconst app = new Koa();\nconst io = new IO();\nio.attach(app);\n\nconst router = new Router();\n\napp.use(cors());\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.post(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n const clientId = ctx.request.headers[\"x-socket-client-id\"];\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const itemExists = current && current.quantity > 0;\n const newRecord = {\n itemName,\n quantity: (itemExists ? current.quantity : 0) + quantity\n };\n\n if (current) {\n await db(\"inventory\")\n .increment(\"quantity\", quantity)\n .where({ itemName });\n } else {\n await db(\"inventory\").insert(newRecord);\n }\n\n Object.entries(io.socket.sockets.connected).forEach(([id, socket]) => {\n if (id === clientId) return;\n socket.emit(\"add_item\", { itemName, quantity });\n });\n\n ctx.body = newRecord;\n});\n\nrouter.delete(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const canDelete = current && current.quantity > quantity;\n\n if (canDelete) {\n await db(\"inventory\")\n .decrement(\"quantity\", quantity)\n .where({ itemName });\n ctx.body = { message: `Removed ${quantity} units of ${itemName}` };\n } else {\n ctx.status = 404;\n ctx.body = {\n message: `There aren't ${quantity} units of ${itemName} available.`\n };\n }\n});\n\nrouter.get(\"/inventory\", async ctx => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"quantity\", \">\", 0)\n .orderBy(\"quantity\", \"desc\");\n\n ctx.body = inventoryContent.reduce((acc, { itemName, quantity }) => {\n return { ...acc, [itemName]: quantity };\n }, {});\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(PORT, \"127.0.0.1\") };\n"
},
{
"path": "chapter11/server/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"list inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n const carrotCake = { itemName: \"carrot cake\", quantity: 0 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie, carrotCake]);\n });\n\n test(\"fetching all available items\", async () => {\n const { body } = await request(app)\n .get(\"/inventory\")\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ eggs: 3, \"apple pie\": 1 });\n });\n});\n\ndescribe(\"add inventory items\", () => {\n test(\"adding a new item\", async () => {\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 3 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"adding an existing item\", async () => {\n const eggs = { itemName: \"eggs\", quantity: 2 };\n await db(\"inventory\").insert(eggs);\n\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 5 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 5 });\n });\n});\n\ndescribe(\"remove inventory items\", () => {\n beforeEach(async () => {\n await db(\"inventory\").insert({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"removing an item\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 2 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"Removed 2 units of eggs\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 1 });\n });\n\n test(\"removing more than the inventory quantity\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 4 })\n .expect(404)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"There aren't 4 units of eggs available.\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"fetching an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter11/server/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter11/server/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter13/1_type_systems/1_no_types/orderQueue.js",
"content": "const state = {\n deliveries: []\n};\n\nconst addToDeliveryQueue = order => {\n if (order.status !== \"done\") {\n throw new Error(\"Can't add unfinished orders to the delivery queue.\");\n }\n state.deliveries.push(order);\n};\n\nmodule.exports = { state, addToDeliveryQueue };\n"
},
{
"path": "chapter13/1_type_systems/1_no_types/orderQueue.spec.js",
"content": "const { state, addToDeliveryQueue } = require(\"./orderQueue\");\n\ntest(\"adding unfinished orders to the queue\", () => {\n state.deliveries = [];\n const newOrder = {\n items: [\"cheesecake\"],\n status: \"in progress\"\n };\n expect(() => addToDeliveryQueue(newOrder)).toThrow();\n expect(state.deliveries).toEqual([]);\n});\n"
},
{
"path": "chapter13/1_type_systems/1_no_types/package.json",
"content": "{\n \"name\": \"1_no_types\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"orderQueue.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.6.0\"\n }\n}\n"
},
{
"path": "chapter13/1_type_systems/2_with_types/orderQueue.js",
"content": "\"use strict\";\nexports.__esModule = true;\nexports.addToDeliveryQueue = exports.state = void 0;\nexports.state = {\n deliveries: []\n};\nvar addToDeliveryQueue = function(order) {\n exports.state.deliveries.push(order);\n};\nexports.addToDeliveryQueue = addToDeliveryQueue;\n"
},
{
"path": "chapter13/1_type_systems/2_with_types/orderQueue.spec.js",
"content": "\"use strict\";\nexports.__esModule = true;\nvar orderQueue_1 = require(\"./orderQueue\");\ntest(\"adding finished items to the queue\", function() {\n orderQueue_1.state.deliveries = [];\n var newOrder = {\n items: [\"cheesecake\"],\n status: \"done\"\n };\n orderQueue_1.addToDeliveryQueue(newOrder);\n expect(orderQueue_1.state.deliveries).toEqual([newOrder]);\n});\n"
},
{
"path": "chapter13/1_type_systems/2_with_types/orderQueue.spec.ts",
"content": "import { state, addToDeliveryQueue, DoneOrder } from \"./orderQueue\";\n\ntest(\"adding finished items to the queue\", () => {\n state.deliveries = [];\n const newOrder: DoneOrder = {\n items: [\"cheesecake\"],\n status: \"done\"\n };\n addToDeliveryQueue(newOrder);\n expect(state.deliveries).toEqual([newOrder]);\n});\n"
},
{
"path": "chapter13/1_type_systems/2_with_types/orderQueue.ts",
"content": "type OrderItems = { 0: string } & Array;\n\ntype Order = {\n status: \"in progress\" | \"done\";\n items: OrderItems;\n};\n\nexport type DoneOrder = Order & { status: \"done\" };\n\nexport const state: { deliveries: Array } = {\n deliveries: []\n};\n\nexport const addToDeliveryQueue = (order: DoneOrder) => {\n state.deliveries.push(order);\n};\n"
},
{
"path": "chapter13/1_type_systems/2_with_types/package.json",
"content": "{\n \"name\": \"1_no_types\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"orderQueue.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@types/jest\": \"^26.0.15\",\n \"jest\": \"^26.6.0\"\n },\n \"dependencies\": {\n \"typescript\": \"^4.1.2\"\n }\n}\n"
},
{
"path": "chapter13/1_type_systems/2_with_types/tsconfig.json",
"content": "{\n \"compilerOptions\": {\n /* Visit https://aka.ms/tsconfig.json to read more about this file */\n\n /* Basic Options */\n // \"incremental\": true, /* Enable incremental compilation */\n \"target\": \"es5\" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,\n \"module\": \"commonjs\" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,\n // \"lib\": [], /* Specify library files to be included in the compilation. */\n // \"allowJs\": true, /* Allow javascript files to be compiled. */\n // \"checkJs\": true, /* Report errors in .js files. */\n // \"jsx\": \"preserve\", /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */\n // \"declaration\": true, /* Generates corresponding '.d.ts' file. */\n // \"declarationMap\": true, /* Generates a sourcemap for each corresponding '.d.ts' file. */\n // \"sourceMap\": true, /* Generates corresponding '.map' file. */\n // \"outFile\": \"./\", /* Concatenate and emit output to single file. */\n // \"outDir\": \"./\", /* Redirect output structure to the directory. */\n // \"rootDir\": \"./\", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */\n // \"composite\": true, /* Enable project compilation */\n // \"tsBuildInfoFile\": \"./\", /* Specify file to store incremental compilation information */\n // \"removeComments\": true, /* Do not emit comments to output. */\n // \"noEmit\": true, /* Do not emit outputs. */\n // \"importHelpers\": true, /* Import emit helpers from 'tslib'. */\n // \"downlevelIteration\": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */\n // \"isolatedModules\": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */\n\n /* Strict Type-Checking Options */\n \"strict\": true /* Enable all strict type-checking options. */,\n // \"noImplicitAny\": true, /* Raise error on expressions and declarations with an implied 'any' type. */\n // \"strictNullChecks\": true, /* Enable strict null checks. */\n // \"strictFunctionTypes\": true, /* Enable strict checking of function types. */\n // \"strictBindCallApply\": true, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */\n // \"strictPropertyInitialization\": true, /* Enable strict checking of property initialization in classes. */\n // \"noImplicitThis\": true, /* Raise error on 'this' expressions with an implied 'any' type. */\n // \"alwaysStrict\": true, /* Parse in strict mode and emit \"use strict\" for each source file. */\n\n /* Additional Checks */\n // \"noUnusedLocals\": true, /* Report errors on unused locals. */\n // \"noUnusedParameters\": true, /* Report errors on unused parameters. */\n // \"noImplicitReturns\": true, /* Report error when not all code paths in function return a value. */\n // \"noFallthroughCasesInSwitch\": true, /* Report errors for fallthrough cases in switch statement. */\n // \"noUncheckedIndexedAccess\": true, /* Include 'undefined' in index signature results */\n\n /* Module Resolution Options */\n // \"moduleResolution\": \"node\", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */\n // \"baseUrl\": \"./\", /* Base directory to resolve non-absolute module names. */\n // \"paths\": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */\n // \"rootDirs\": [], /* List of root folders whose combined content represents the structure of the project at runtime. */\n // \"typeRoots\": [], /* List of folders to include type definitions from. */\n // \"types\": [], /* Type declaration files to be included in compilation. */\n // \"allowSyntheticDefaultImports\": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */\n \"esModuleInterop\": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,\n // \"preserveSymlinks\": true, /* Do not resolve the real path of symlinks. */\n // \"allowUmdGlobalAccess\": true, /* Allow accessing UMD globals from modules. */\n\n /* Source Map Options */\n // \"sourceRoot\": \"\", /* Specify the location where debugger should locate TypeScript files instead of source locations. */\n // \"mapRoot\": \"\", /* Specify the location where debugger should locate map files instead of generated locations. */\n // \"inlineSourceMap\": true, /* Emit a single file with source maps instead of having a separate file. */\n // \"inlineSources\": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */\n\n /* Experimental Options */\n // \"experimentalDecorators\": true, /* Enables experimental support for ES7 decorators. */\n // \"emitDecoratorMetadata\": true, /* Enables experimental support for emitting type metadata for decorators. */\n\n /* Advanced Options */\n \"skipLibCheck\": true /* Skip type checking of declaration files. */,\n \"forceConsistentCasingInFileNames\": true /* Disallow inconsistently-cased references to the same file. */\n }\n}\n"
},
{
"path": "chapter2/2_unit_tests/1_raw_tests/Cart.js",
"content": "class Cart {\n constructor() {\n this.items = [];\n }\n\n addToCart(item) {\n this.items.push(item);\n }\n}\n\nmodule.exports = Cart;\n"
},
{
"path": "chapter2/2_unit_tests/1_raw_tests/Cart.test.js",
"content": "const Cart = require(\"./Cart.js\");\n\nconst cart = new Cart();\ncart.addToCart(\"cheesecake\");\n\nconst hasOneItem = cart.items.length === 1;\nconst hasACheesecake = cart.items[0] === \"cheesecake\";\n\nif (hasOneItem && hasACheesecake) {\n console.log(\"The addToCart function can add an item to the cart\");\n} else {\n const actualContent = cart.items.join(\", \");\n\n console.error(\"The addToCart function didn't do what we expect!\");\n console.error(`Here is the actual content of the cart: ${actualContent}`);\n\n throw new Error(\"Test failed!\");\n}\n"
},
{
"path": "chapter2/2_unit_tests/2_node_assert/Cart.js",
"content": "class Cart {\n constructor() {\n this.items = [];\n }\n\n addToCart(item) {\n this.items.push(item);\n }\n}\n\nmodule.exports = Cart;\n"
},
{
"path": "chapter2/2_unit_tests/2_node_assert/Cart.test.js",
"content": "const assert = require(\"assert\");\nconst Cart = require(\"./Cart.js\");\n\nconst cart = new Cart();\ncart.addToCart(\"cheesecake\");\n\nassert.deepStrictEqual(cart.items, [\"cheesecake\"]);\n\nconsole.log(\"The addToCart function can add an item to the cart\");\n"
},
{
"path": "chapter2/2_unit_tests/3_jest_multiple_tests/Cart.js",
"content": "class Cart {\n constructor() {\n this.items = [];\n }\n\n addToCart(item) {\n this.items.push(item);\n }\n\n removeFromCart(item) {\n for (let i = 0; i < this.items.length; i++) {\n const currentItem = this.items[i];\n if (currentItem === item) {\n this.items.splice(i, 1);\n }\n }\n }\n}\n\nmodule.exports = Cart;\n"
},
{
"path": "chapter2/2_unit_tests/3_jest_multiple_tests/Cart.test.js",
"content": "const assert = require(\"assert\");\nconst Cart = require(\"./Cart.js\");\n\ntest(\"The addToCart function can add an item to the cart\", () => {\n const cart = new Cart();\n cart.addToCart(\"cheesecake\");\n\n assert.deepStrictEqual(cart.items, [\"cheesecake\"]);\n});\n\ntest(\"The addToCart function can add an item to the cart\", () => {\n const cart = new Cart();\n cart.addToCart(\"cheesecake\");\n cart.removeFromCart(\"cheesecake\");\n\n assert.deepStrictEqual(cart.items, []);\n});\n"
},
{
"path": "chapter2/2_unit_tests/3_jest_multiple_tests/package.json",
"content": "{\n \"name\": \"3_jest_multiple_tests\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"Cart.js\",\n \"scripts\": {\n \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\"\n}\n"
},
{
"path": "chapter2/2_unit_tests/4_jest_assertions/Cart.js",
"content": "class Cart {\n constructor() {\n this.items = [];\n }\n\n addToCart(item) {\n this.items.push(item);\n }\n\n removeFromCart(item) {\n for (let i = 0; i < this.items.length; i++) {\n const currentItem = this.items[i];\n if (currentItem === item) {\n this.items.splice(i, 1);\n }\n }\n }\n}\n\nmodule.exports = Cart;\n"
},
{
"path": "chapter2/2_unit_tests/4_jest_assertions/Cart.test.js",
"content": "const Cart = require(\"./Cart.js\");\n\ntest(\"The addToCart function can add an item to the cart\", () => {\n const cart = new Cart();\n cart.addToCart(\"cheesecake\");\n\n expect(cart.items).toEqual([\"cheesecake\"]);\n});\n\ntest(\"The removeFromCart function can remove an item from the cart\", () => {\n const cart = new Cart();\n cart.addToCart(\"cheesecake\");\n cart.removeFromCart(\"cheesecake\");\n\n expect(cart.items).toEqual([]);\n});\n"
},
{
"path": "chapter2/2_unit_tests/4_jest_assertions/package.json",
"content": "{\n \"name\": \"4_jest_assertions\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"Cart.js\",\n \"scripts\": {\n \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\"\n}\n"
},
{
"path": "chapter2/2_unit_tests/5_npm_scripts/Cart.js",
"content": "class Cart {\n constructor() {\n this.items = [];\n }\n\n addToCart(item) {\n this.items.push(item);\n }\n\n removeFromCart(item) {\n for (let i = 0; i < this.items.length; i++) {\n const currentItem = this.items[i];\n if (currentItem === item) {\n this.items.splice(i, 1);\n }\n }\n }\n}\n\nmodule.exports = Cart;\n"
},
{
"path": "chapter2/2_unit_tests/5_npm_scripts/Cart.test.js",
"content": "const Cart = require(\"./Cart.js\");\n\ntest(\"The addToCart function can add an item to the cart\", () => {\n const cart = new Cart();\n cart.addToCart(\"cheesecake\");\n\n expect(cart.items).toEqual([\"cheesecake\"]);\n});\n\ntest(\"The addToCart function can add an item to the cart\", () => {\n const cart = new Cart();\n cart.addToCart(\"cheesecake\");\n cart.removeFromCart(\"cheesecake\");\n\n expect(cart.items).toEqual([]);\n});\n"
},
{
"path": "chapter2/2_unit_tests/5_npm_scripts/package.json",
"content": "{\n \"name\": \"5_global_jest\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter2/3_integration_tests/1_knex_tests_promise/cart.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst createCart = username => {\n return db(\"carts\").insert({ username });\n};\n\nconst addItem = (cartId, itemName) => {\n return db(\"carts_items\").insert({ cartId, itemName });\n};\n\nmodule.exports = {\n createCart,\n addItem\n};\n"
},
{
"path": "chapter2/3_integration_tests/1_knex_tests_promise/cart.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst { createCart } = require(\"./cart\");\n\ntest(\"createCart creates a cart for a username\", async () => {\n await db(\"carts\").truncate();\n await createCart(\"Lucas da Costa\");\n const result = await db.select(\"username\").from(\"carts\");\n expect(result).toEqual([{ username: \"Lucas da Costa\" }]);\n await closeConnection();\n});\n"
},
{
"path": "chapter2/3_integration_tests/1_knex_tests_promise/dbConnection.js",
"content": "const db = require(\"knex\")(require(\"./knexfile\").development);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter2/3_integration_tests/1_knex_tests_promise/knexfile.js",
"content": "module.exports = {\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter2/3_integration_tests/1_knex_tests_promise/migrations/20191230210750_create_carts.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"carts\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"cartId\").references(\"carts.id\");\n table.string(\"itemName\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"carts\");\n await knex.schema.dropTable(\"carts_items\");\n};\n"
},
{
"path": "chapter2/3_integration_tests/1_knex_tests_promise/package.json",
"content": "{\n \"name\": \"1_knex_tests_promise\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"dependencies\": {\n \"knex\": \"^0.20.6\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter2/3_integration_tests/2_knex_tests_done_cb/cart.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst createCart = username => {\n return db(\"carts\").insert({ username });\n};\n\nconst addItem = (cartId, itemName) => {\n return db(\"carts_items\").insert({ cartId, itemName });\n};\n\nmodule.exports = {\n createCart,\n addItem\n};\n"
},
{
"path": "chapter2/3_integration_tests/2_knex_tests_done_cb/cart.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst { createCart } = require(\"./cart\");\n\ntest(\"createCart creates a cart for a username\", done => {\n db(\"carts\")\n .truncate()\n .then(() => createCart(\"Lucas da Costa\"))\n .then(() => db.select(\"username\").from(\"carts\"))\n .then(result => {\n expect(result).toEqual([{ username: \"Lucas da Costa\" }]);\n })\n .then(closeConnection)\n .then(done);\n});\n"
},
{
"path": "chapter2/3_integration_tests/2_knex_tests_done_cb/dbConnection.js",
"content": "const db = require(\"knex\")(require(\"./knexfile\").development);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter2/3_integration_tests/2_knex_tests_done_cb/knexfile.js",
"content": "module.exports = {\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter2/3_integration_tests/2_knex_tests_done_cb/migrations/20191230210750_create_carts.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"carts\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"cartId\").references(\"carts.id\");\n table.string(\"itemName\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"carts\");\n await knex.schema.dropTable(\"carts_items\");\n};\n"
},
{
"path": "chapter2/3_integration_tests/2_knex_tests_done_cb/package.json",
"content": "{\n \"name\": \"2_knex_tests_done_cb\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"dependencies\": {\n \"knex\": \"^0.20.6\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter2/3_integration_tests/3_knex_tests_hooks/cart.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst createCart = username => {\n return db(\"carts\").insert({ username });\n};\n\nconst addItem = (cartId, itemName) => {\n return db(\"carts_items\").insert({ cartId, itemName });\n};\n\nmodule.exports = {\n createCart,\n addItem\n};\n"
},
{
"path": "chapter2/3_integration_tests/3_knex_tests_hooks/cart.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst { createCart, addItem } = require(\"./cart\");\n\nbeforeEach(async () => {\n await db(\"carts_items\").truncate();\n await db(\"carts\").truncate();\n});\n\nafterAll(async () => await closeConnection());\n\ntest(\"createCart creates a cart for a username\", async () => {\n await createCart(\"Lucas da Costa\");\n const result = await db.select(\"username\").from(\"carts\");\n expect(result).toEqual([{ username: \"Lucas da Costa\" }]);\n});\n\ntest(\"addItem adds an item to the cart\", async () => {\n const username = \"Lucas da Costa\";\n await createCart(username);\n const { id: cartId } = await db\n .select()\n .from(\"carts\")\n .where({ username });\n await addItem(cartId, \"cheesecake\");\n const result = await db.select(\"itemName\").from(\"carts_items\");\n expect(result).toEqual([{ cartId, itemName: \"cheesecake\" }]);\n});\n"
},
{
"path": "chapter2/3_integration_tests/3_knex_tests_hooks/dbConnection.js",
"content": "const db = require(\"knex\")(require(\"./knexfile\").development);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter2/3_integration_tests/3_knex_tests_hooks/knexfile.js",
"content": "module.exports = {\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter2/3_integration_tests/3_knex_tests_hooks/migrations/20191230210750_create_carts.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"carts\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"cartId\").references(\"carts.id\");\n table.string(\"itemName\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"carts\");\n await knex.schema.dropTable(\"carts_items\");\n};\n"
},
{
"path": "chapter2/3_integration_tests/3_knex_tests_hooks/package.json",
"content": "{\n \"name\": \"1_knex_tests_promise\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"dependencies\": {\n \"knex\": \"^0.20.6\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter2/4_end_to_end_tests/1_http_api_tests/package.json",
"content": "{\n \"name\": \"1_http_api_tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter2/4_end_to_end_tests/1_http_api_tests/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst app = new Koa();\nconst router = new Router();\n\nconst carts = new Map();\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = app.listen(3000);\n"
},
{
"path": "chapter2/4_end_to_end_tests/1_http_api_tests/server.test.js",
"content": "const app = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nconst addItem = (username, item) => {\n return fetch(`${apiRoot}/carts/${username}/items/${item}`, {\n method: \"POST\"\n });\n};\n\nconst getItems = username => {\n return fetch(`${apiRoot}/carts/${username}/items`, { method: \"GET\" });\n};\n\ntest(\"adding items to a cart\", async () => {\n const initialItemsResponse = await getItems(\"lucas\");\n expect(initialItemsResponse.status).toBe(404);\n\n const addItemResponse = await addItem(\"lucas\", \"cheesecake\");\n expect(await addItemResponse.json()).toEqual([\"cheesecake\"]);\n\n const finalItemsResponse = await getItems(\"lucas\");\n expect(await finalItemsResponse.json()).toEqual([\"cheesecake\"]);\n});\n\nafterAll(() => app.close());\n"
},
{
"path": "chapter2/4_end_to_end_tests/2_http_api_with_remove_item/package.json",
"content": "{\n \"name\": \"1_http_api_tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^26.6.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter2/4_end_to_end_tests/2_http_api_with_remove_item/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst app = new Koa();\nconst router = new Router();\n\nlet carts = new Map();\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\n// This method is designed especifically for testability.\n// Because we keep `carts` in memory, we must reset it back\n// to its inital state by deleting all items in it.\n// If you were dealing with a database, you'd have to do\n// something similar in your tests by ensuring the database\n// is reset to its initial state before each test.\nconst resetState = () => {\n carts = new Map();\n};\n\nmodule.exports = {\n app: app.listen(3000),\n resetState\n};\n"
},
{
"path": "chapter2/4_end_to_end_tests/2_http_api_with_remove_item/server.test.js",
"content": "const { app, resetState } = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nconst addItem = (username, item) => {\n return fetch(`${apiRoot}/carts/${username}/items/${item}`, {\n method: \"POST\"\n });\n};\n\nconst removeItem = (username, item) => {\n return fetch(`${apiRoot}/carts/${username}/items/${item}`, {\n method: \"DELETE\"\n });\n};\n\nconst getItems = username => {\n return fetch(`${apiRoot}/carts/${username}/items`, { method: \"GET\" });\n};\n\ntest(\"adding items to a cart\", async () => {\n const initialItemsResponse = await getItems(\"lucas\");\n expect(initialItemsResponse.status).toBe(404);\n\n const addItemResponse = await addItem(\"lucas\", \"cheesecake\");\n expect(await addItemResponse.json()).toEqual([\"cheesecake\"]);\n\n const finalItemsResponse = await getItems(\"lucas\");\n expect(await finalItemsResponse.json()).toEqual([\"cheesecake\"]);\n});\n\ntest(\"removing items from a cart\", async () => {\n const initialItemsResponse = await getItems(\"lucas\");\n expect(initialItemsResponse.status).toBe(404);\n\n await addItem(\"lucas\", \"cheesecake\");\n\n const removeItemsResponse = await removeItem(\"lucas\", \"cheesecake\");\n expect(await removeItemsResponse.json()).toEqual([]);\n\n const finalItemsResponse = await getItems(\"lucas\");\n expect(await finalItemsResponse.json()).toEqual([]);\n});\n\n// We must clean-up our server's state before each test.\n// If you kept state in a database, you'd need to ensure\n// your database is reset to its initial state.\nbeforeEach(() => resetState());\nafterAll(() => app.close());\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/1_good_vs_bad/badly_written.test.js",
"content": "const { app, resetState } = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\n\ntest(\"adding items to a cart\", done => {\n resetState();\n return fetch(`http://localhost:3000/carts/lucas/items`, {\n method: \"GET\"\n })\n .then(initialItemsResponse => {\n expect(initialItemsResponse.status).toEqual(404);\n return fetch(`http://localhost:3000/carts/lucas/items/cheesecake`, {\n method: \"POST\"\n }).then(response => response.json());\n })\n .then(addItemResponse => {\n expect(addItemResponse).toEqual([\"cheesecake\"]);\n return fetch(`http://localhost:3000/carts/lucas/items`, {\n method: \"GET\"\n }).then(response => response.json());\n })\n .then(finalItemsResponse => {\n expect(finalItemsResponse).toEqual([\"cheesecake\"]);\n })\n .then(() => {\n app.close();\n done();\n });\n});\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/1_good_vs_bad/package.json",
"content": "{\n \"name\": \"1_good_vs_bad\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test-good\": \"jest well_written.test.js\",\n \"test-bad\": \"jest badly_written.test.js\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/1_good_vs_bad/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst app = new Koa();\nconst router = new Router();\n\nlet carts = new Map();\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\n// This method is designed especifically for testability.\n// Because we keep `carts` in memory, we must reset it back\n// to its inital state by deleting all items in it.\n// If you were dealing with a database, you'd have to do\n// something similar in your tests by ensuring the database\n// is reset to its initial state before each test.\nconst resetState = () => {\n carts = new Map();\n};\n\nmodule.exports = {\n app: app.listen(3000),\n resetState\n};\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/1_good_vs_bad/well_written.test.js",
"content": "const { app, resetState } = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nconst addItem = (username, item) => {\n return fetch(`${apiRoot}/carts/${username}/items/${item}`, {\n method: \"POST\"\n });\n};\n\nconst getItems = username => {\n return fetch(`${apiRoot}/carts/${username}/items`, { method: \"GET\" });\n};\n\nbeforeEach(() => resetState());\nafterAll(() => app.close());\n\ntest(\"adding items to a cart\", async () => {\n const initialItemsResponse = await getItems(\"lucas\");\n expect(initialItemsResponse.status).toBe(404);\n\n const addItemResponse = await addItem(\"lucas\", \"cheesecake\");\n expect(await addItemResponse.json()).toEqual([\"cheesecake\"]);\n\n const finalItemsResponse = await getItems(\"lucas\");\n expect(await finalItemsResponse.json()).toEqual([\"cheesecake\"]);\n});\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/2_test_coupling/package.json",
"content": "{\n \"name\": \"2_test_coupling\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/2_test_coupling/pow.test.js",
"content": "//const pow = require(\"./pow_recursive\");\nconst pow = require(\"./pow_loop\");\n\ntest(\"calculates powers\", () => {\n expect(pow(2, 0)).toBe(1);\n expect(pow(2, -3)).toBe(0.125);\n expect(pow(2, 2)).toBe(4);\n expect(pow(2, 5)).toBe(32);\n expect(pow(0, 5)).toBe(0);\n expect(pow(1, 4)).toBe(1);\n});\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/2_test_coupling/pow_loop.js",
"content": "const pow = (a, b) => {\n let result = 1;\n for (let i = 0; i < Math.abs(b); i++) {\n if (b < 0) result = result / a;\n if (b > 0) result = result * a;\n }\n\n return result;\n};\n\nmodule.exports = pow;\n"
},
{
"path": "chapter2/5_tests_cost_and_revenue/2_test_coupling/pow_recursive.js",
"content": "const pow = (a, b, acc = 1) => {\n if (b === 0) return acc;\n const nextB = b < 0 ? b + 1 : b - 1;\n const nextAcc = b < 0 ? acc / a : acc * a;\n return pow(a, nextB, nextAcc);\n};\n\nmodule.exports = pow;\n"
},
{
"path": "chapter3/1_organising_test_suites/1_breaking_down_tests_big_tests/package.json",
"content": "{\n \"name\": \"1_breaking_down_tests_big_tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter3/1_organising_test_suites/1_breaking_down_tests_big_tests/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst app = new Koa();\nconst router = new Router();\n\nconst carts = new Map();\nconst inventory = new Map();\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!inventory.get(item)) {\n ctx.status = 404;\n return;\n }\n\n inventory.set(item, inventory.get(item) - 1);\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = {\n app: app.listen(3000),\n inventory,\n carts\n};\n"
},
{
"path": "chapter3/1_organising_test_suites/1_breaking_down_tests_big_tests/server.test.js",
"content": "const { app, inventory, carts } = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nconst addItem = (username, item) => {\n return fetch(`${apiRoot}/carts/${username}/items/${item}`, {\n method: \"POST\"\n });\n};\n\ndescribe(\"addItem\", () => {\n test(\"adding items to a cart\", async () => {\n inventory.set(\"cheesecake\", 1);\n const addItemResponse = await addItem(\"lucas\", \"cheesecake\");\n expect(await addItemResponse.json()).toEqual([\"cheesecake\"]);\n expect(inventory.get(\"cheesecake\")).toBe(0);\n\n expect(carts.get(\"lucas\")).toEqual([\"cheesecake\"]);\n\n const failedAddItem = await addItem(\"lucas\", \"cheesecake\");\n expect(failedAddItem.status).toBe(404);\n });\n});\n\nafterAll(() => app.close());\n"
},
{
"path": "chapter3/1_organising_test_suites/2_breaking_down_tests_small_tests/package.json",
"content": "{\n \"name\": \"2_breaking_down_tests_small_tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter3/1_organising_test_suites/2_breaking_down_tests_small_tests/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst app = new Koa();\nconst router = new Router();\n\nconst carts = new Map();\nconst inventory = new Map();\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!inventory.get(item)) {\n ctx.status = 404;\n return;\n }\n\n inventory.set(item, inventory.get(item) - 1);\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = {\n app: app.listen(3000),\n inventory,\n carts\n};\n"
},
{
"path": "chapter3/1_organising_test_suites/2_breaking_down_tests_small_tests/server.test.js",
"content": "const { app, inventory, carts } = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nconst addItem = (username, item) => {\n return fetch(`${apiRoot}/carts/${username}/items/${item}`, {\n method: \"POST\"\n });\n};\n\ndescribe(\"addItem\", () => {\n beforeEach(() => carts.forEach((value, key) => carts.delete(key)));\n beforeEach(() => inventory.set(\"cheesecake\", 1));\n\n test(\"correct response\", async () => {\n const addItemResponse = await addItem(\"lucas\", \"cheesecake\");\n expect(await addItemResponse.json()).toEqual([\"cheesecake\"]);\n });\n\n test(\"inventory update\", async () => {\n await addItem(\"lucas\", \"cheesecake\");\n expect(inventory.get(\"cheesecake\")).toBe(0);\n });\n\n test(\"cart update\", async () => {\n await addItem(\"keith\", \"cheesecake\");\n expect(carts.get(\"keith\")).toEqual([\"cheesecake\"]);\n });\n\n test(\"soldout items\", async () => {\n inventory.set(\"cheesecake\", 0);\n const failedAddItem = await addItem(\"lucas\", \"cheesecake\");\n expect(failedAddItem.status).toBe(404);\n });\n});\n\nafterAll(() => app.close());\n"
},
{
"path": "chapter3/1_organising_test_suites/3_global_hooks/dummy.test.js",
"content": "describe(\"placeholder tests\", () => {\n test(\"placeholder 1\", () => {});\n test(\"placeholder 2\", () => {});\n test(\"placeholder 3\", () => {});\n});\n"
},
{
"path": "chapter3/1_organising_test_suites/3_global_hooks/globalSetup.js",
"content": "const setup = () => {\n global._accessibleOnTeardown = \"Look, I was set on the setup file\";\n console.log(\"\\nsetup executed\\n\");\n};\n\nmodule.exports = setup;\n"
},
{
"path": "chapter3/1_organising_test_suites/3_global_hooks/globalTeardown.js",
"content": "const teardown = () => {\n console.log(`The value set on setup was: ${global._accessibleOnTeardown}`);\n console.log(\"teardown executed\");\n};\n\nmodule.exports = teardown;\n"
},
{
"path": "chapter3/1_organising_test_suites/3_global_hooks/jest.config.js",
"content": "module.exports = {\n globalSetup: \"./globalSetup.js\",\n globalTeardown: \"./globalTeardown.js\",\n testEnvironment: \"node\"\n};\n"
},
{
"path": "chapter3/1_organising_test_suites/3_global_hooks/package.json",
"content": "{\n \"name\": \"1_organising_test_suites\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/1_assertion_checks/inventoryController.js",
"content": "const inventory = new Map();\n\nconst addToInventory = (item, n) => {\n if (typeof n !== \"number\") throw new Error(\"quantity must be a number\");\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + n;\n inventory.set(item, newQuantity);\n return newQuantity;\n};\n\nmodule.exports = { inventory, addToInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/1_assertion_checks/inventoryController.test.js",
"content": "const { inventory, addToInventory } = require(\"./inventoryController\");\n\nbeforeEach(() => inventory.set(\"cheesecake\", 0));\n\ntest(\"cancels operation for invalid quantities\", () => {\n expect.assertions(2);\n\n try {\n addToInventory(\"cheesecake\", \"not a number\");\n } catch (e) {\n expect(inventory.get(\"cheesecake\")).toBe(0);\n }\n\n expect(Array.from(inventory.entries())).toHaveLength(1);\n});\n"
},
{
"path": "chapter3/2_writing_good_assertions/1_assertion_checks/package.json",
"content": "{\n \"name\": \"1_assertion_checks\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/2_assertion_checks_toThrow/inventoryController.js",
"content": "const inventory = new Map();\n\nconst addToInventory = (item, n) => {\n if (typeof n !== \"number\") throw new Error(\"quantity must be a number\");\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + n;\n inventory.set(item, newQuantity);\n return newQuantity;\n};\n\nmodule.exports = { inventory, addToInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/2_assertion_checks_toThrow/inventoryController.test.js",
"content": "const { inventory, addToInventory } = require(\"./inventoryController\");\n\nbeforeEach(() => inventory.set(\"cheesecake\", 0));\n\ntest(\"cancels operation for invalid quantities\", () => {\n expect(() => addToInventory(\"cheesecake\", \"not a number\")).not.toThrow();\n expect(inventory.get(\"cheesecake\")).toBe(0);\n expect(Array.from(inventory.entries())).toHaveLength(1);\n});\n"
},
{
"path": "chapter3/2_writing_good_assertions/2_assertion_checks_toThrow/package.json",
"content": "{\n \"name\": \"1_assertion_checks\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/3_loose_assertions/inventoryController.js",
"content": "const inventory = new Map();\n\nconst addToInventory = (item, n) => {\n if (typeof n !== \"number\") throw new Error(\"quantity must be a number\");\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + n;\n inventory.set(item, newQuantity);\n return newQuantity;\n};\n\nmodule.exports = { inventory, addToInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/3_loose_assertions/inventoryController.test.js",
"content": "const { inventory, addToInventory } = require(\"./inventoryController\");\n\nbeforeEach(() => {\n inventory.forEach((value, key) => inventory.delete(key));\n});\n\ntest(\"returned value\", () => {\n const result = addToInventory(\"cheesecake\", 2);\n expect(typeof result).toBe(\"number\");\n});\n"
},
{
"path": "chapter3/2_writing_good_assertions/3_loose_assertions/package.json",
"content": "{\n \"name\": \"2_loose_assertions\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/4_asymmetric_matchers/inventoryController.js",
"content": "const inventory = new Map();\n\nconst addToInventory = (item, n) => {\n if (typeof n !== \"number\") throw new Error(\"quantity must be a number\");\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + n;\n inventory.set(item, newQuantity);\n return newQuantity;\n};\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name, quantity]) => {\n return { ...contents, [name]: quantity };\n }, {});\n\n return { ...contents, generatedAt: new Date() };\n};\n\nmodule.exports = { inventory, addToInventory, getInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/4_asymmetric_matchers/inventoryController.test.js",
"content": "const { inventory, getInventory } = require(\"./inventoryController\");\n\ntest(\"inventory contents\", () => {\n inventory\n .set(\"cheesecake\", 1)\n .set(\"macarroon\", 3)\n .set(\"croissant\", 3)\n .set(\"eclaire\", 7);\n const result = getInventory();\n\n expect(result).toEqual({\n cheesecake: 1,\n macarroon: 3,\n croissant: 3,\n eclaire: 7,\n generatedAt: expect.any(Date)\n });\n});\n"
},
{
"path": "chapter3/2_writing_good_assertions/4_asymmetric_matchers/package.json",
"content": "{\n \"name\": \"3_asymmetric_matchers\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/5_manual_assertions/inventoryController.js",
"content": "const inventory = new Map();\n\nconst addToInventory = (item, n) => {\n if (typeof n !== \"number\") throw new Error(\"quantity must be a number\");\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + n;\n inventory.set(item, newQuantity);\n return newQuantity;\n};\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name, quantity]) => {\n return { ...contents, [name]: quantity };\n }, {});\n\n // To make the tests in this folder pass, update this\n // line so that it doesn't set the new Date's year to 3000.\n return { ...contents, generatedAt: new Date(new Date().setYear(3000)) };\n};\n\nmodule.exports = { inventory, addToInventory, getInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/5_manual_assertions/inventoryController.test.js",
"content": "const { getInventory } = require(\"./inventoryController\");\n\n// This test _will_ fail.\n// Here I'm trying to demonstrate Jest's output\n// when an assertion like `.toBe(true)` fails.\ntest(\"generatedAt in the past\", () => {\n const result = getInventory();\n const currentTime = Date.now() + 1;\n const isPastTimestamp = result.generatedAt.getTime() <= currentTime;\n expect(isPastTimestamp).toBe(true);\n});\n"
},
{
"path": "chapter3/2_writing_good_assertions/5_manual_assertions/package.json",
"content": "{\n \"name\": \"4_manual_assertions\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/6_custom_matchers/inventoryController.js",
"content": "const inventory = new Map();\n\nconst addToInventory = (item, n) => {\n if (typeof n !== \"number\") throw new Error(\"quantity must be a number\");\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + n;\n inventory.set(item, newQuantity);\n return newQuantity;\n};\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name, quantity]) => {\n return { ...contents, [name]: quantity };\n }, {});\n\n return { ...contents, generatedAt: new Date(new Date().setYear(3000)) };\n};\n\nmodule.exports = { inventory, addToInventory, getInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/6_custom_matchers/inventoryController.test.js",
"content": "const { getInventory } = require(\"./inventoryController\");\n\ntest(\"generatedAt in the past\", () => {\n const result = getInventory();\n const currentTime = new Date(Date.now() + 1);\n expect(result.generatedAt).toBeBefore(currentTime);\n});\n"
},
{
"path": "chapter3/2_writing_good_assertions/6_custom_matchers/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n setupFilesAfterEnv: [\"jest-extended\"]\n};\n"
},
{
"path": "chapter3/2_writing_good_assertions/6_custom_matchers/package.json",
"content": "{\n \"name\": \"5_custom_matchers\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"jest.config.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\",\n \"jest-extended\": \"^0.11.5\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/7_circular_assertions/inventoryController.js",
"content": "const inventory = new Map();\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name]) => {\n return { ...contents, [name]: 1000 };\n }, {});\n\n return { ...contents, generatedAt: new Date() };\n};\n\nmodule.exports = { inventory, getInventory };\n"
},
{
"path": "chapter3/2_writing_good_assertions/7_circular_assertions/package.json",
"content": "{\n \"name\": \"6_circular_assertions\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.1.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^8.0.8\"\n }\n}\n"
},
{
"path": "chapter3/2_writing_good_assertions/7_circular_assertions/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst { getInventory } = require(\"./inventoryController\");\n\nconst app = new Koa();\nconst router = new Router();\n\nrouter.get(\"/inventory\", ctx => (ctx.body = getInventory()));\n\napp.use(router.routes());\n\nmodule.exports = app.listen(3000);\n"
},
{
"path": "chapter3/2_writing_good_assertions/7_circular_assertions/server.test.js",
"content": "const app = require(\"./server\");\nconst fetch = require(\"isomorphic-fetch\");\nconst { inventory, getInventory } = require(\"./inventoryController\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nconst sendGetInventoryRequest = () => {\n return fetch(`${apiRoot}/inventory`, { method: \"GET\" });\n};\n\ntest(\"fetching inventory\", async () => {\n inventory.set(\"cheesecake\", 1).set(\"macarroon\", 2);\n const getInventoryResponse = await sendGetInventoryRequest(\"lucas\");\n const expected = { ...getInventory(), generatedAt: expect.anything() };\n\n expect(await getInventoryResponse.json()).toEqual(expected);\n});\n\nafterAll(() => app.close());\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/1_mocking_objects/inventoryController.js",
"content": "const logger = require(\"./logger\");\n\nconst inventory = new Map();\n\nconst addToInventory = (item, quantity) => {\n if (typeof quantity !== \"number\") {\n logger.logError(\n { quantity },\n \"could not add item to inventory because quantity was not a number\"\n );\n throw new Error(\"quantity must be a number\");\n }\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + quantity;\n inventory.set(item, newQuantity);\n logger.logInfo(\n { item, quantity, memoryUsage: process.memoryUsage().rss },\n \"item added to the inventory\"\n );\n return newQuantity;\n};\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name, quantity]) => {\n return { ...contents, [name]: quantity };\n }, {});\n\n logger.logInfo({ contents }, \"inventory items fetched\");\n return { ...contents, generatedAt: new Date(new Date().setYear(3000)) };\n};\n\nmodule.exports = { inventory, addToInventory, getInventory };\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/1_mocking_objects/inventoryController.test.js",
"content": "const logger = require(\"./logger\");\nconst {\n inventory,\n addToInventory,\n getInventory\n} = require(\"./inventoryController\");\n\n// Clearing the inventory before each test\nbeforeEach(() => {\n inventory.forEach((value, key) => inventory.delete(key));\n});\n\nbeforeAll(() => jest.spyOn(logger, \"logInfo\").mockImplementation(jest.fn()));\nbeforeAll(() => jest.spyOn(logger, \"logError\").mockImplementation(jest.fn()));\n\nafterEach(() => jest.resetAllMocks());\n\ndescribe(\"addToInventory\", () => {\n beforeEach(() => {\n jest\n .spyOn(process, \"memoryUsage\")\n .mockReturnValue({ rss: 123456, heapTotal: 1, heapUsed: 2, external: 3 });\n });\n\n test(\"logging new items\", () => {\n addToInventory(\"cheesecake\", 2);\n\n expect(logger.logInfo.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logInfo.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({\n item: \"cheesecake\",\n quantity: 2,\n memoryUsage: 123456\n });\n expect(secondArg).toEqual(\"item added to the inventory\");\n });\n\n test(\"logging logErrors\", () => {\n try {\n addToInventory(\"cheesecake\", \"not a number\");\n } catch (e) {\n // No-op\n }\n\n expect(logger.logError.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logError.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({ quantity: \"not a number\" });\n expect(secondArg).toEqual(\n \"could not add item to inventory because quantity was not a number\"\n );\n });\n});\n\ndescribe(\"getInventory\", () => {\n test(\"logging fetches\", () => {\n inventory.set(\"cheesecake\", 2);\n getInventory(\"cheesecake\", 2);\n\n expect(logger.logInfo.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logInfo.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({ contents: { cheesecake: 2 } });\n expect(secondArg).toEqual(\"inventory items fetched\");\n });\n});\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/1_mocking_objects/logger.js",
"content": "const pino = require(\"pino\");\n\nconst pinoInstance = pino();\n\nconst logger = {\n logInfo: pinoInstance.info.bind(pinoInstance),\n logError: pinoInstance.error.bind(pinoInstance)\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/1_mocking_objects/package.json",
"content": "{\n \"name\": \"1_mocking_objects\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"inventoryController.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n },\n \"dependencies\": {\n \"pino\": \"^5.16.0\"\n }\n}\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/2_mocking_imports/inventoryController.js",
"content": "const { logInfo, logError } = require(\"./logger\");\n\nconst inventory = new Map();\n\nconst addToInventory = (item, quantity) => {\n if (typeof quantity !== \"number\") {\n logError(\n { quantity },\n \"could not add item to inventory because quantity was not a number\"\n );\n throw new Error(\"quantity must be a number\");\n }\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + quantity;\n inventory.set(item, newQuantity);\n logInfo(\n { item, quantity, memoryUsage: process.memoryUsage().rss },\n \"item added to the inventory\"\n );\n return newQuantity;\n};\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name, quantity]) => {\n return { ...contents, [name]: quantity };\n }, {});\n\n logInfo({ contents }, \"inventory items fetched\");\n return { ...contents, generatedAt: new Date(new Date().setYear(3000)) };\n};\n\nmodule.exports = { inventory, addToInventory, getInventory };\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/2_mocking_imports/inventoryController.test.js",
"content": "const logger = require(\"./logger\");\nconst {\n inventory,\n addToInventory,\n getInventory\n} = require(\"./inventoryController\");\n\njest.mock(\"./logger\", () => ({\n logInfo: jest.fn(),\n logError: jest.fn()\n}));\n\n// Clearing the inventory before each test\nbeforeEach(() => {\n inventory.forEach((value, key) => inventory.delete(key));\n});\n\nafterEach(() => jest.resetAllMocks());\n\ndescribe(\"addToInventory\", () => {\n beforeEach(() => {\n jest\n .spyOn(process, \"memoryUsage\")\n .mockReturnValue({ rss: 123456, heapTotal: 1, heapUsed: 2, external: 3 });\n });\n\n test(\"logging new items\", () => {\n addToInventory(\"cheesecake\", 2);\n\n expect(logger.logInfo.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logInfo.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({\n item: \"cheesecake\",\n quantity: 2,\n memoryUsage: 123456\n });\n expect(secondArg).toEqual(\"item added to the inventory\");\n });\n\n test(\"logging logErrors\", () => {\n try {\n addToInventory(\"cheesecake\", \"not a number\");\n } catch (e) {\n // No-op\n }\n\n expect(logger.logError.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logError.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({ quantity: \"not a number\" });\n expect(secondArg).toEqual(\n \"could not add item to inventory because quantity was not a number\"\n );\n });\n});\n\ndescribe(\"getInventory\", () => {\n test(\"logging fetches\", () => {\n inventory.set(\"cheesecake\", 2);\n getInventory(\"cheesecake\", 2);\n\n expect(logger.logInfo.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logInfo.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({ contents: { cheesecake: 2 } });\n expect(secondArg).toEqual(\"inventory items fetched\");\n });\n});\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/2_mocking_imports/logger.js",
"content": "const pino = require(\"pino\");\n\nconst pinoInstance = pino();\n\nconst logger = {\n logInfo: pinoInstance.info.bind(pinoInstance),\n logError: pinoInstance.error.bind(pinoInstance)\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/2_mocking_imports/package.json",
"content": "{\n \"name\": \"2_mocking_imports\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"inventoryController.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n },\n \"dependencies\": {\n \"pino\": \"^5.16.0\"\n }\n}\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/3_manual_mocks/__mocks__/logger.js",
"content": "module.exports = {\n logInfo: jest.fn(),\n logError: jest.fn()\n};\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/3_manual_mocks/inventoryController.js",
"content": "const { logInfo, logError } = require(\"./logger\");\n\nconst inventory = new Map();\n\nconst addToInventory = (item, quantity) => {\n if (typeof quantity !== \"number\") {\n logError(\n { quantity },\n \"could not add item to inventory because quantity was not a number\"\n );\n throw new Error(\"quantity must be a number\");\n }\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + quantity;\n inventory.set(item, newQuantity);\n logInfo(\n { item, quantity, memoryUsage: process.memoryUsage().rss },\n \"item added to the inventory\"\n );\n return newQuantity;\n};\n\nconst getInventory = () => {\n const contentArray = Array.from(inventory.entries());\n const contents = contentArray.reduce((contents, [name, quantity]) => {\n return { ...contents, [name]: quantity };\n }, {});\n\n logInfo({ contents }, \"inventory items fetched\");\n return { ...contents, generatedAt: new Date(new Date().setYear(3000)) };\n};\n\nmodule.exports = { inventory, addToInventory, getInventory };\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/3_manual_mocks/inventoryController.test.js",
"content": "const logger = require(\"./logger\");\nconst {\n inventory,\n addToInventory,\n getInventory\n} = require(\"./inventoryController\");\n\n// Clearing the inventory before each test\nbeforeEach(() => {\n inventory.forEach((value, key) => inventory.delete(key));\n});\n\nafterEach(() => jest.resetAllMocks());\n\njest.mock(\"./logger\");\n\ndescribe(\"addToInventory\", () => {\n beforeEach(() => {\n jest\n .spyOn(process, \"memoryUsage\")\n .mockReturnValue({ rss: 123456, heapTotal: 1, heapUsed: 2, external: 3 });\n });\n\n test(\"logging new items\", () => {\n addToInventory(\"cheesecake\", 2);\n\n expect(logger.logInfo.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logInfo.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({\n item: \"cheesecake\",\n quantity: 2,\n memoryUsage: 123456\n });\n expect(secondArg).toEqual(\"item added to the inventory\");\n });\n\n test(\"logging logErrors\", () => {\n try {\n addToInventory(\"cheesecake\", \"not a number\");\n } catch (e) {\n // No-op\n }\n\n expect(logger.logError.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logError.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({ quantity: \"not a number\" });\n expect(secondArg).toEqual(\n \"could not add item to inventory because quantity was not a number\"\n );\n });\n});\n\ndescribe(\"getInventory\", () => {\n test(\"logging fetches\", () => {\n inventory.set(\"cheesecake\", 2);\n getInventory(\"cheesecake\", 2);\n\n expect(logger.logInfo.mock.calls).toHaveLength(1);\n\n const firstCallArgs = logger.logInfo.mock.calls[0];\n const [firstArg, secondArg] = firstCallArgs;\n\n expect(firstArg).toEqual({ contents: { cheesecake: 2 } });\n expect(secondArg).toEqual(\"inventory items fetched\");\n });\n});\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/3_manual_mocks/logger.js",
"content": "const pino = require(\"pino\");\n\nconst pinoInstance = pino();\n\nconst logger = {\n logInfo: pinoInstance.info.bind(pinoInstance),\n logError: pinoInstance.error.bind(pinoInstance)\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter3/3_mocks_stubs_and_spies/3_manual_mocks/package.json",
"content": "{\n \"name\": \"3_manual_mocks\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"inventoryController.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.6.0\"\n },\n \"dependencies\": {\n \"pino\": \"^5.16.0\"\n }\n}\n"
},
{
"path": "chapter3/4_code_coverage/1_measuring_code_coverage/__mocks__/logger.js",
"content": "module.exports = {\n logInfo: jest.fn(),\n logError: jest.fn()\n};\n"
},
{
"path": "chapter3/4_code_coverage/1_measuring_code_coverage/inventoryController.js",
"content": "const { logInfo, logError } = require(\"./logger\");\n\nconst inventory = new Map();\n\nconst addToInventory = (item, quantity) => {\n if (typeof quantity !== \"number\") {\n logError(\n { quantity },\n \"could not add item to inventory because quantity was not a number\"\n );\n throw new Error(\"quantity must be a number\");\n }\n const currentQuantity = inventory.get(item) || 0;\n const newQuantity = currentQuantity + quantity;\n inventory.set(item, newQuantity);\n logInfo(\n { item, quantity, memoryUsage: process.memoryUsage().rss },\n \"item added to the inventory\"\n );\n return newQuantity;\n};\n\nmodule.exports = { inventory, addToInventory };\n"
},
{
"path": "chapter3/4_code_coverage/1_measuring_code_coverage/inventoryController.test.js",
"content": "const { inventory, addToInventory } = require(\"./inventoryController\");\n\njest.mock(\"./logger\");\n\nbeforeEach(() => inventory.clear());\n\ndescribe(\"addToInventory\", () => {\n test(\"passing valid arguments\", () => {\n addToInventory(\"cheesecake\", 2);\n });\n\n test(\"passing invalid arguments\", () => {\n try {\n addToInventory(\"cheesecake\", \"should throw\");\n } catch (e) {\n // ...\n }\n });\n});\n"
},
{
"path": "chapter3/4_code_coverage/1_measuring_code_coverage/logger.js",
"content": "const pino = require(\"pino\");\n\nconst pinoInstance = pino();\n\nconst logger = {\n logInfo: pinoInstance.info.bind(pinoInstance),\n logError: pinoInstance.error.bind(pinoInstance)\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter3/4_code_coverage/1_measuring_code_coverage/package.json",
"content": "{\n \"name\": \"1_measuring_code_coverage\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"inventoryController.js\",\n \"scripts\": {\n \"test\": \"jest\",\n \"coverage\": \"jest --coverage\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n },\n \"dependencies\": {\n \"pino\": \"^5.16.0\"\n }\n}\n"
},
{
"path": "chapter3/4_code_coverage/2_what_coverage_is_good_for/math.js",
"content": "function sumOrDivide(a, b) {\n if (a % 2 === 0 && b % 2 === 0) {\n return a + b;\n } else {\n return a / b;\n }\n}\n"
},
{
"path": "chapter3/4_code_coverage/2_what_coverage_is_good_for/math.test.js",
"content": "test(\"sum\", () => {\n sumOrDivide(2, 4);\n // WARNING: No assertions!\n});\n\ntest(\"multiply\", () => {\n sumOrDivide(2, 6);\n // WARNING: No assertions!\n});\n"
},
{
"path": "chapter3/4_code_coverage/2_what_coverage_is_good_for/package.json",
"content": "{\n \"name\": \"2_what_coverage_is_good_for\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"inventoryController.js\",\n \"scripts\": {\n \"test\": \"jest\",\n \"coverage\": \"jest --coverage\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.1.0\"\n },\n \"dependencies\": {\n \"pino\": \"^5.16.0\"\n }\n}\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/1_end_to_end_tests/package.json",
"content": "{\n \"name\": \"1_end_to_end_tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/1_end_to_end_tests/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst app = new Koa();\nconst router = new Router();\n\nlet carts = new Map();\nlet inventory = new Map();\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n const isAvailable = inventory.has(item) && inventory.get(item) > 0;\n if (!isAvailable) {\n ctx.body = { message: `${item} is unavailable` };\n ctx.status = 400;\n return;\n }\n\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n inventory.set(item, inventory.get(item) - 1);\n ctx.body = newItems;\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!carts.has(username) || !carts.get(username).includes(item)) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n inventory.set(item, (inventory.get(item) || 0) + 1);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000), carts, inventory };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/1_end_to_end_tests/server.test.js",
"content": "const { app, carts, inventory } = require(\"./server.js\");\n\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nafterAll(() => app.close());\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n inventory.set(\"cheesecake\", 1);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"POST\" }\n );\n\n expect(response.status).toEqual(200);\n expect(await response.json()).toEqual([\"cheesecake\"]);\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n expect(carts.get(\"test_user\")).toEqual([\"cheesecake\"]);\n });\n\n test(\"adding unavailable items\", async () => {\n carts.set(\"test_user\", []);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"POST\" }\n );\n\n expect(response.status).toEqual(400);\n expect(await response.json()).toEqual({\n message: \"cheesecake is unavailable\"\n });\n expect(carts.get(\"test_user\")).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n carts.set(\"test_user\", [\"cheesecake\"]);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"DELETE\" }\n );\n\n expect(response.status).toEqual(200);\n expect(await response.json()).toEqual([]);\n expect(carts.get(\"test_user\")).toEqual([]);\n expect(inventory.get(\"cheesecake\")).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n inventory.set(\"cheesecake\", 0);\n carts.set(\"test_user\", []);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"DELETE\" }\n );\n\n expect(response.status).toEqual(400);\n expect(await response.json()).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n });\n});\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/cartController.js",
"content": "const { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst carts = new Map();\n\nconst addItemToCart = (username, item) => {\n removeFromInventory(item);\n const newItems = (carts.get(username) || []).concat(item);\n carts.set(username, newItems);\n logger.log(`${item} added to ${username}'s cart`);\n return newItems;\n};\n\nmodule.exports = { addItemToCart, carts };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/cartController.test.js",
"content": "const { inventory } = require(\"./inventoryController\");\nconst { carts, addItemToCart } = require(\"./cartController\");\nconst fs = require(\"fs\");\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 0);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(`cheesecake is unavailable`);\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 1);\n\n addItemToCart(\"test_user\", \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\"cheesecake added to test_user's cart\\n\");\n });\n});\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/inventoryController.js",
"content": "const inventory = new Map();\n\nconst removeFromInventory = item => {\n if (!inventory.has(item) || !inventory.get(item) > 0) {\n const err = new Error(`${item} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n inventory.set(item, inventory.get(item) - 1);\n};\n\nmodule.exports = { removeFromInventory, inventory };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/package.json",
"content": "{\n \"name\": \"1_integration-tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst { carts, addItemToCart } = require(\"./cartController\");\nconst { inventory } = require(\"./inventoryController\");\n\nconst app = new Koa();\nconst router = new Router();\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n try {\n const { username, item } = ctx.params;\n const newItems = addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!carts.has(username) || !carts.get(username).includes(item)) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n inventory.set(item, (inventory.get(item) || 0) + 1);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000), carts, inventory };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/2_integration_tests/server.test.js",
"content": "const { app } = require(\"./server.js\");\nconst { inventory } = require(\"./inventoryController.js\");\nconst { carts } = require(\"./cartController.js\");\n\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nafterAll(() => app.close());\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n inventory.set(\"cheesecake\", 1);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"POST\" }\n );\n\n expect(response.status).toEqual(200);\n expect(await response.json()).toEqual([\"cheesecake\"]);\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n expect(carts.get(\"test_user\")).toEqual([\"cheesecake\"]);\n });\n\n test(\"adding unavailable items\", async () => {\n carts.set(\"test_user\", []);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"POST\" }\n );\n\n expect(response.status).toEqual(400);\n expect(await response.json()).toEqual({\n message: \"cheesecake is unavailable\"\n });\n expect(carts.get(\"test_user\")).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n carts.set(\"test_user\", [\"cheesecake\"]);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"DELETE\" }\n );\n\n expect(response.status).toEqual(200);\n expect(await response.json()).toEqual([]);\n expect(carts.get(\"test_user\")).toEqual([]);\n expect(inventory.get(\"cheesecake\")).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n inventory.set(\"cheesecake\", 0);\n carts.set(\"test_user\", []);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"DELETE\" }\n );\n\n expect(response.status).toEqual(400);\n expect(await response.json()).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n });\n});\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/cartController.js",
"content": "const { inventory, removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst carts = new Map();\n\nconst addItemToCart = (username, item) => {\n removeFromInventory(item);\n const newItems = (carts.get(username) || []).concat(item);\n\n if (!compliesToItemLimit(newItems)) {\n inventory.set(item, inventory.get(item) + 1);\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n carts.set(username, newItems);\n logger.log(`${item} added to ${username}'s cart`);\n return newItems;\n};\n\nconst compliesToItemLimit = cart => {\n const unitsPerItem = cart.reduce((itemMap, itemName) => {\n const quantity = (itemMap[itemName] || 0) + 1;\n return { ...itemMap, [itemName]: quantity };\n }, {});\n\n return Object.values(unitsPerItem).every(quantity => quantity <= 3);\n};\n\nmodule.exports = { addItemToCart, carts, compliesToItemLimit };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/cartController.test.js",
"content": "const { inventory } = require(\"./inventoryController\");\nconst {\n carts,\n addItemToCart,\n compliesToItemLimit\n} = require(\"./cartController\");\nconst fs = require(\"fs\");\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 0);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", () => {\n const initialCartContent = [\"cheesecake\", \"cheesecake\", \"cheesecake\"];\n carts.set(\"test_user\", initialCartContent);\n inventory.set(\"cheesecake\", 1);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual(initialCartContent);\n expect(inventory.get('cheesecake')).toEqual(1);\n expect.assertions(3);\n });\n\n test(\"logging added items\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 1);\n\n addItemToCart(\"test_user\", \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\"cheesecake added to test_user's cart\\n\");\n });\n});\n\ndescribe(\"compliesToItemLimit\", () => {\n test(\"returns true for cards with no more than 3 items of a kind\", () => {\n const cart = [\"cheesecake\", \"cheesecake\", \"almond brownie\", \"apple pie\"];\n expect(compliesToItemLimit(cart)).toBe(true);\n });\n\n test(\"returns false for cards with no more than 3 items of a kind\", () => {\n const cart = [\n \"cheesecake\",\n \"cheesecake\",\n \"almond brownie\",\n \"cheesecake\",\n \"cheesecake\"\n ];\n expect(compliesToItemLimit(cart)).toBe(false);\n });\n});\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/inventoryController.js",
"content": "const inventory = new Map();\n\nconst removeFromInventory = item => {\n if (!inventory.has(item) || !inventory.get(item) > 0) {\n const err = new Error(`${item} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n inventory.set(item, inventory.get(item) - 1);\n};\n\nmodule.exports = { removeFromInventory, inventory };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/package.json",
"content": "{\n \"name\": \"1_unit_tests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\n\nconst { carts, addItemToCart } = require(\"./cartController\");\nconst { inventory } = require(\"./inventoryController\");\n\nconst app = new Koa();\nconst router = new Router();\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items/:item\", ctx => {\n try {\n const { username, item } = ctx.params;\n const newItems = addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!carts.has(username) || !carts.get(username).includes(item)) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n inventory.set(item, (inventory.get(item) || 0) + 1);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000), carts, inventory };\n"
},
{
"path": "chapter4/1_setting_up_a_test_environment/1_exposing_modules/3_unit_tests/server.test.js",
"content": "const { app } = require(\"./server.js\");\nconst { inventory } = require(\"./inventoryController.js\");\nconst { carts } = require(\"./cartController.js\");\n\nconst fetch = require(\"isomorphic-fetch\");\n\nconst apiRoot = \"http://localhost:3000\";\n\nafterAll(() => app.close());\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n inventory.set(\"cheesecake\", 1);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"POST\" }\n );\n\n expect(response.status).toEqual(200);\n expect(await response.json()).toEqual([\"cheesecake\"]);\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n expect(carts.get(\"test_user\")).toEqual([\"cheesecake\"]);\n });\n\n test(\"adding unavailable items\", async () => {\n carts.set(\"test_user\", []);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"POST\" }\n );\n\n expect(response.status).toEqual(400);\n expect(await response.json()).toEqual({\n message: \"cheesecake is unavailable\"\n });\n expect(carts.get(\"test_user\")).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n carts.set(\"test_user\", [\"cheesecake\"]);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"DELETE\" }\n );\n\n expect(response.status).toEqual(200);\n expect(await response.json()).toEqual([]);\n expect(carts.get(\"test_user\")).toEqual([]);\n expect(inventory.get(\"cheesecake\")).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n inventory.set(\"cheesecake\", 0);\n carts.set(\"test_user\", []);\n const response = await fetch(\n `${apiRoot}/carts/test_user/items/cheesecake`,\n { method: \"DELETE\" }\n );\n\n expect(response.status).toEqual(400);\n expect(await response.json()).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n });\n});\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/cartController.js",
"content": "const { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst carts = new Map();\n\nconst addItemToCart = (username, item) => {\n removeFromInventory(item);\n const newItems = (carts.get(username) || []).concat(item);\n\n if (!compliesToItemLimit(newItems)) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n carts.set(username, newItems);\n logger.log(`${item} added to ${username}'s cart`);\n return newItems;\n};\n\nconst compliesToItemLimit = cart => {\n const unitsPerItem = cart.reduce((itemMap, itemName) => {\n const quantity = (itemMap[itemName] || 0) + 1;\n return { ...itemMap, [itemName]: quantity };\n }, {});\n\n return Object.values(unitsPerItem).every(quantity => quantity <= 3);\n};\n\nmodule.exports = { addItemToCart, carts, compliesToItemLimit };\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/cartController.test.js",
"content": "const { inventory } = require(\"./inventoryController\");\nconst {\n carts,\n addItemToCart,\n compliesToItemLimit\n} = require(\"./cartController\");\nconst fs = require(\"fs\");\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 0);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", () => {\n const initialCartContent = [\"cheesecake\", \"cheesecake\", \"cheesecake\"];\n carts.set(\"test_user\", initialCartContent);\n inventory.set(\"cheesecake\", 1);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual(initialCartContent);\n expect.assertions(2);\n });\n\n test(\"logging added items\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 1);\n\n addItemToCart(\"test_user\", \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\"cheesecake added to test_user's cart\\n\");\n });\n});\n\ndescribe(\"compliesToItemLimit\", () => {\n test(\"returns true for cards with no more than 3 items of a kind\", () => {\n const cart = [\"cheesecake\", \"cheesecake\", \"almond brownie\", \"apple pie\"];\n expect(compliesToItemLimit(cart)).toBe(true);\n });\n\n test(\"returns true for cards with no more than 3 items of a kind\", () => {\n const cart = [\n \"cheesecake\",\n \"cheesecake\",\n \"almond brownie\",\n \"cheesecake\",\n \"cheesecake\"\n ];\n expect(compliesToItemLimit(cart)).toBe(false);\n });\n});\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/inventoryController.js",
"content": "const inventory = new Map();\n\nconst removeFromInventory = item => {\n if (!inventory.has(item) || !inventory.get(item) > 0) {\n const err = new Error(`${item} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n inventory.set(item, inventory.get(item) - 1);\n};\n\nmodule.exports = { removeFromInventory, inventory };\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/package.json",
"content": "{\n \"name\": \"2_using_supertest\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { carts, addItemToCart } = require(\"./cartController\");\nconst { inventory } = require(\"./inventoryController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\nrouter.get(\"/carts/:username/items\", ctx => {\n const cart = carts.get(ctx.params.username);\n cart ? (ctx.body = cart) : (ctx.status = 404);\n});\n\nrouter.post(\"/carts/:username/items\", ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!carts.has(username) || !carts.get(username).includes(item)) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n inventory.set(item, (inventory.get(item) || 0) + 1);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000), carts, inventory };\n"
},
{
"path": "chapter4/2_testing_http_endpoints/1_using_supertest/server.test.js",
"content": "const request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { inventory } = require(\"./inventoryController.js\");\nconst { carts } = require(\"./cartController.js\");\n\nafterAll(() => app.close());\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n inventory.set(\"cheesecake\", 3);\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [\"cheesecake\", \"cheesecake\", \"cheesecake\"];\n expect(response.body).toEqual(newItems);\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n expect(carts.get(\"test_user\")).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n carts.set(\"test_user\", []);\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n expect(carts.get(\"test_user\")).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n carts.set(\"test_user\", [\"cheesecake\"]);\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual([]);\n expect(carts.get(\"test_user\")).toEqual([]);\n expect(inventory.get(\"cheesecake\")).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n inventory.set(\"cheesecake\", 0);\n carts.set(\"test_user\", []);\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n });\n});\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst users = new Map();\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = (username, password) => {\n const userExists = users.has(username);\n if (!userExists) return false;\n\n const currentPasswordHash = users.get(username).passwordHash;\n return hashPassword(password) === currentPasswordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n if (!credentialsAreValid(username, password)) {\n throw new Error(\"invalid credentials\");\n }\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n users,\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n users,\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nafterEach(() => users.clear());\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", () => {\n users.set(\"test_user\", {\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n expect(credentialsAreValid(\"test_user\", \"a_password\")).toBe(true);\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n users.set(\"test_user\", {\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const validAuth = Buffer.from(\"test_user:a_password\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${validAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/cartController.js",
"content": "const { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst carts = new Map();\n\nconst addItemToCart = (username, item) => {\n removeFromInventory(item);\n const newItems = (carts.get(username) || []).concat(item);\n\n if (!compliesToItemLimit(newItems)) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n carts.set(username, newItems);\n logger.log(`${item} added to ${username}'s cart`);\n return newItems;\n};\n\nconst compliesToItemLimit = cart => {\n const unitsPerItem = cart.reduce((itemMap, itemName) => {\n const quantity = (itemMap[itemName] || 0) + 1;\n return { ...itemMap, [itemName]: quantity };\n }, {});\n\n return Object.values(unitsPerItem).every(quantity => quantity <= 3);\n};\n\nmodule.exports = { addItemToCart, carts, compliesToItemLimit };\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/cartController.test.js",
"content": "const { inventory } = require(\"./inventoryController\");\nconst {\n carts,\n addItemToCart,\n compliesToItemLimit\n} = require(\"./cartController\");\nconst fs = require(\"fs\");\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 0);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", () => {\n const initialCartContent = [\"cheesecake\", \"cheesecake\", \"cheesecake\"];\n carts.set(\"test_user\", initialCartContent);\n inventory.set(\"cheesecake\", 1);\n\n try {\n addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n expect(carts.get(\"test_user\")).toEqual(initialCartContent);\n expect.assertions(2);\n });\n\n test(\"logging added items\", () => {\n carts.set(\"test_user\", []);\n inventory.set(\"cheesecake\", 1);\n\n addItemToCart(\"test_user\", \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\"cheesecake added to test_user's cart\\n\");\n });\n});\n\ndescribe(\"compliesToItemLimit\", () => {\n test(\"returns true for cards with no more than 3 items of a kind\", () => {\n const cart = [\"cheesecake\", \"cheesecake\", \"almond brownie\", \"apple pie\"];\n expect(compliesToItemLimit(cart)).toBe(true);\n });\n\n test(\"returns true for cards with no more than 3 items of a kind\", () => {\n const cart = [\n \"cheesecake\",\n \"cheesecake\",\n \"almond brownie\",\n \"cheesecake\",\n \"cheesecake\"\n ];\n expect(compliesToItemLimit(cart)).toBe(false);\n });\n});\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/inventoryController.js",
"content": "const inventory = new Map();\n\nconst removeFromInventory = item => {\n if (!inventory.has(item) || !inventory.get(item) > 0) {\n const err = new Error(`${item} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n inventory.set(item, inventory.get(item) - 1);\n};\n\nmodule.exports = { removeFromInventory, inventory };\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/package.json",
"content": "{\n \"name\": \"2_testing_middlewares\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\"\n }\n}\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { carts, addItemToCart } = require(\"./cartController\");\nconst { inventory } = require(\"./inventoryController\");\nconst {\n users,\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n const userAlreadyExists = users.has(username);\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n users.set(username, { email, passwordHash: hashPassword(password) });\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", ctx => {\n const { username, item } = ctx.params;\n if (!carts.has(username) || !carts.get(username).includes(item)) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n const newItems = (carts.get(username) || []).filter(i => i !== item);\n inventory.set(item, (inventory.get(item) || 0) + 1);\n carts.set(username, newItems);\n ctx.body = newItems;\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000), carts, inventory };\n"
},
{
"path": "chapter4/2_testing_http_endpoints/2_testing_middlewares/server.test.js",
"content": "const request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { inventory } = require(\"./inventoryController.js\");\nconst { carts } = require(\"./cartController.js\");\nconst { users, hashPassword } = require(\"./authenticationController.js\");\n\nafterAll(() => app.close());\n\nafterEach(() => inventory.clear());\nafterEach(() => carts.clear());\nafterEach(() => users.clear());\n\nconst user = \"test_user\";\nconst password = \"a_password\";\nconst validAuth = Buffer.from(`${user}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\nconst createUser = () => {\n users.set(user, {\n email: \"test_user@example.org\",\n passwordHash: hashPassword(password)\n });\n};\n\ndescribe(\"add items to a cart\", () => {\n beforeEach(createUser);\n\n test(\"adding available items\", async () => {\n inventory.set(\"cheesecake\", 3);\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .set(\"authorization\", authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [\"cheesecake\", \"cheesecake\", \"cheesecake\"];\n expect(response.body).toEqual(newItems);\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n expect(carts.get(\"test_user\")).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n carts.set(\"test_user\", []);\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .set(\"authorization\", authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n expect(carts.get(\"test_user\")).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n beforeEach(createUser);\n\n test(\"removing existing items\", async () => {\n carts.set(\"test_user\", [\"cheesecake\"]);\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .set(\"authorization\", authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual([]);\n expect(carts.get(\"test_user\")).toEqual([]);\n expect(inventory.get(\"cheesecake\")).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n inventory.set(\"cheesecake\", 0);\n carts.set(\"test_user\", []);\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .set(\"authorization\", authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n expect(inventory.get(\"cheesecake\")).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/test_user\")\n .send({ email: \"test_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"test_user created successfully\"\n });\n\n expect(users.get(\"test_user\")).toEqual({\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n users.set(\"test_user\", {\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const response = await request(app)\n .put(\"/users/test_user\")\n .send({ email: \"test_user@example.org\", password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"test_user already exists\"\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/authenticationController.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nbeforeEach(() => db(\"users\").truncate());\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n expect(await credentialsAreValid(\"test_user\", \"a_password\")).toBe(true);\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const validAuth = Buffer.from(\"test_user:a_password\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${validAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nmodule.exports = { addItemToCart };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/cartController.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst { addItemToCart } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst fs = require(\"fs\");\n\nbeforeEach(() => db(\"users\").truncate());\nbeforeEach(() => db(\"carts_items\").truncate());\nbeforeEach(() => db(\"inventory\").truncate());\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const { id: userId } = await db\n .select()\n .from(\"users\")\n .where({ username: \"test_user\" })\n .first();\n\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const { id: userId } = await db\n .select()\n .from(\"users\")\n .where({ username: \"test_user\" })\n .first();\n\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(\"test_user\", \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\"cheesecake added to test_user's cart\\n\");\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/dbConnection.js",
"content": "const knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\").development;\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/knexfile.js",
"content": "module.exports = {\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/package.json",
"content": "{\n \"name\": \"1_database_integrations\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"sqlite3\": \"^4.1.1\"\n }\n}\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/1_database_integrations/server.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\n\nafterAll(() => app.close());\n\nbeforeEach(() => db(\"users\").truncate());\nbeforeEach(() => db(\"carts_items\").truncate());\nbeforeEach(() => db(\"inventory\").truncate());\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\nconst createUser = async () => {\n return await db(\"users\").insert({\n username,\n email: \"test_user@example.org\",\n passwordHash: hashPassword(password)\n });\n};\n\ndescribe(\"add items to a cart\", () => {\n beforeEach(createUser);\n\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .set(\"authorization\", authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .set(\"authorization\", authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n let userId;\n beforeEach(async () => {\n userId = (await createUser())[0];\n });\n\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .set(\"authorization\", authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .set(\"authorization\", authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/test_user\")\n .send({ email: \"test_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"test_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"test_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n await createUser();\n\n const response = await request(app)\n .put(\"/users/test_user\")\n .send({ email: \"test_user@example.org\", password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"test_user already exists\"\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/authenticationController.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nbeforeEach(() => db(\"users\").truncate());\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n expect(await credentialsAreValid(\"test_user\", \"a_password\")).toBe(true);\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const validAuth = Buffer.from(\"test_user:a_password\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${validAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nmodule.exports = { addItemToCart };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/cartController.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst { addItemToCart } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst fs = require(\"fs\");\n\nbeforeEach(() => db(\"users\").truncate());\nbeforeEach(() => db(\"carts_items\").truncate());\nbeforeEach(() => db(\"inventory\").truncate());\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const { id: userId } = await db\n .select()\n .from(\"users\")\n .where({ username: \"test_user\" })\n .first();\n\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(\"test_user\", \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"users\").insert({\n username: \"test_user\",\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n\n const { id: userId } = await db\n .select()\n .from(\"users\")\n .where({ username: \"test_user\" })\n .first();\n\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(\"test_user\", \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\"cheesecake added to test_user's cart\\n\");\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/dbConnection.js",
"content": "const knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\").development;\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/package.json",
"content": "{\n \"name\": \"2_separate_database_instances\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"sqlite3\": \"^4.1.1\"\n }\n}\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/2_separate_database_instances/server.test.js",
"content": "const { db, closeConnection } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\n\nafterAll(() => app.close());\n\nbeforeEach(() => db(\"users\").truncate());\nbeforeEach(() => db(\"carts_items\").truncate());\nbeforeEach(() => db(\"inventory\").truncate());\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\nconst createUser = async () => {\n return await db(\"users\").insert({\n username,\n email: \"test_user@example.org\",\n passwordHash: hashPassword(password)\n });\n};\n\ndescribe(\"add items to a cart\", () => {\n beforeEach(createUser);\n\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .set(\"authorization\", authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(\"/carts/test_user/items\")\n .set(\"authorization\", authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n let userId;\n beforeEach(async () => {\n userId = (await createUser())[0];\n });\n\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .set(\"authorization\", authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", \"test_user\");\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(\"/carts/test_user/items/cheesecake\")\n .set(\"authorization\", authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/test_user\")\n .send({ email: \"test_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"test_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"test_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"test_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n await createUser();\n\n const response = await request(app)\n .put(\"/users/test_user\")\n .send({ email: \"test_user@example.org\", password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"test_user already exists\"\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nmodule.exports = { addItemToCart };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\")[environmentName];\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/package.json",
"content": "{\n \"name\": \"3_maintaining_a_pristine_state\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"sqlite3\": \"^4.1.1\"\n }\n}\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/server.js",
"content": "const Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/3_maitaining_a_pristine_state/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/authenticationController.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nmodule.exports = { addItemToCart };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\")[environmentName];\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/package.json",
"content": "{\n \"name\": \"4_integrations_with_other_apis\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"sqlite3\": \"^4.1.1\"\n }\n}\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/server.test.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"can fetch an item from the inventory\", async () => {\n const thirdPartyResponse = await fetch(\"http://recipepuppy.com/api?i=eggs\");\n const { title, href, results: recipes } = await thirdPartyResponse.json();\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/4_integrations_with_other_apis/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/authenticationController.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nmodule.exports = { addItemToCart };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\")[environmentName];\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/package.json",
"content": "{\n \"name\": \"5_using_mocks_to_avoid_requests\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"jest-when\": \"^2.7.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"sqlite3\": \"^4.1.1\"\n }\n}\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/server.test.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst { when } = require(\"jest-when\");\n\nafterAll(() => app.close());\n\njest.mock(\"isomorphic-fetch\");\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"can fetch an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n fetch.mockRejectedValue(\"Not used as expected!\");\n when(fetch)\n .calledWith(\"http://recipepuppy.com/api?i=eggs\")\n .mockResolvedValue({\n json: jest.fn().mockResolvedValue(eggsResponse)\n });\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/5_using_mocks_to_avoid_requests/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nmodule.exports = { addItemToCart };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\")[environmentName];\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/package.json",
"content": "{\n \"name\": \"4_integrations_with_other_apis\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\"\n },\n \"devDependencies\": {\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"nock\": \"^12.0.3\",\n \"sqlite3\": \"^4.1.1\"\n }\n}\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n beforeEach(() => {\n nock.cleanAll();\n });\n\n afterEach(() => {\n if (!nock.isDone()) {\n throw new Error(\"Not all mocked endpoints received requests.\");\n }\n });\n\n test(\"can fetch an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter4/3_dealing_with_external_dependencies/6_using_nock_to_avoid_requests/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/1_shared_resources/countModule.js",
"content": "const fs = require(\"fs\");\nconst filepath = \"./state.txt\";\n\nconst getState = () => parseInt(fs.readFileSync(filepath), 10);\nconst setState = n => fs.writeFileSync(filepath, n);\nconst increment = () => fs.writeFileSync(filepath, getState() + 1);\nconst decrement = () => fs.writeFileSync(filepath, getState() - 1);\n\nmodule.exports = { getState, setState, increment, decrement };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/1_shared_resources/decrement.test.js",
"content": "const { getState, setState, decrement } = require(\"./countModule\");\n\ntest(\"decrementing the state 10 times\", () => {\n setState(0);\n for (let i = 0; i < 10; i++) {\n decrement();\n }\n\n expect(getState()).toBe(-10);\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/1_shared_resources/increment.test.js",
"content": "const { getState, setState, increment } = require(\"./countModule\");\n\ntest(\"incrementing the state 10 times\", () => {\n setState(0);\n for (let i = 0; i < 10; i++) {\n increment();\n }\n\n expect(getState()).toBe(10);\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/1_shared_resources/package.json",
"content": "{\n \"name\": \"1_shared_resources\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.6.0\"\n }\n}\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/2_resource_pools/countModule.js",
"content": "const fs = require(\"fs\");\n\nconst init = filepath => {\n const getState = () => {\n return parseInt(fs.readFileSync(filepath, \"utf-8\"), 10);\n };\n const setState = n => fs.writeFileSync(filepath, n);\n const increment = () => fs.writeFileSync(filepath, getState() + 1);\n const decrement = () => fs.writeFileSync(filepath, getState() - 1);\n\n return { getState, setState, increment, decrement };\n};\n\nmodule.exports = { init };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/2_resource_pools/decrement.test.js",
"content": "const pool = require(\"./instancePool\");\nconst instance = pool.getInstance(process.env.JEST_WORKER_ID);\nconst { setState, getState, decrement } = instance;\n\ntest(\"decrementing the state 10 times\", () => {\n setState(0);\n for (let i = 0; i < 10; i++) {\n decrement();\n }\n\n expect(getState()).toBe(-10);\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/2_resource_pools/increment.test.js",
"content": "const pool = require(\"./instancePool\");\nconst instance = pool.getInstance(process.env.JEST_WORKER_ID);\nconst { setState, getState, increment } = instance;\n\ntest(\"incrementing the state 10 times\", () => {\n setState(0);\n for (let i = 0; i < 10; i++) {\n increment();\n }\n\n expect(getState()).toBe(10);\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/2_resource_pools/instancePool.js",
"content": "const { init } = require(\"./countModule\");\n\nconst instancePool = {};\n\nconst getInstance = workerId => {\n if (!instancePool[workerId]) {\n instancePool[workerId] = init(`/tmp/test_state_${workerId}.txt`);\n }\n\n return instancePool[workerId];\n};\n\nmodule.exports = { getInstance };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/2_resource_pools/package.json",
"content": "{\n \"name\": \"2_resource_pools\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.2.3\"\n }\n}\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .update({ updatedAt: new Date().toISOString() })\n .where({\n userId: itemEntry.userId,\n itemName\n });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1,\n updatedAt: new Date().toISOString()\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nconst hoursInMs = n => 1000 * 60 * 60 * n;\n\nconst removeStaleItems = async () => {\n const fourHoursAgo = new Date(Date.now() - hoursInMs(4)).toISOString();\n\n const staleItems = await db\n .select()\n .from(\"carts_items\")\n .where(\"updatedAt\", \"<\", fourHoursAgo);\n\n if (staleItems.length === 0) return;\n\n // Put stale items back in the inventory\n const inventoryUpdates = staleItems.map(staleItem =>\n db(\"inventory\")\n .increment(\"quantity\", staleItem.quantity)\n .where({ itemName: staleItem.itemName })\n );\n await Promise.all(inventoryUpdates);\n\n // Delete stale items from cart\n const staleItemTuples = staleItems.map(i => [i.itemName, i.userId]);\n await db(\"carts_items\")\n .del()\n .whereIn([\"itemName\", \"userId\"], staleItemTuples);\n};\n\nconst monitorStaleItems = () => setInterval(removeStaleItems, hoursInMs(2));\n\nmodule.exports = { addItemToCart, monitorStaleItems };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart, monitorStaleItems } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst FakeTimers = require(\"@sinonjs/fake-timers\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n\nconst withRetries = async fn => {\n // Capture the assertion error since Jest does not export it\n const JestAssertionError = (() => {\n try {\n expect(false).toBe(true);\n } catch (e) {\n return e.constructor;\n }\n })();\n\n try {\n await fn();\n } catch (e) {\n if (e.constructor === JestAssertionError) {\n // Wait 100ms before retrying\n await new Promise(resolve => setTimeout(resolve, 100));\n await withRetries(fn);\n } else {\n throw e;\n }\n }\n};\n\ndescribe(\"timers\", () => {\n const hoursInMs = n => 1000 * 60 * 60 * n;\n\n let clock;\n beforeEach(() => {\n clock = FakeTimers.install({ toFake: [\"Date\", \"setInterval\"] });\n });\n\n afterEach(() => {\n clock = clock.uninstall();\n });\n\n test(\"removing stale items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n clock.tick(hoursInMs(4));\n timer = monitorStaleItems();\n clock.tick(hoursInMs(2));\n\n await withRetries(async () => {\n const finalCartContent = await db\n .select()\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n });\n\n await withRetries(async () => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\");\n\n expect(inventoryContent).toEqual([\n { itemName: \"cheesecake\", quantity: 1 }\n ]);\n });\n });\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst knex = require(\"knex\");\nconst knexConfig = require(\"./knexfile\")[environmentName];\n\nconst db = knex(knexConfig);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/migrations/20200331210311_updatedAt_field.js",
"content": "exports.up = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.timestamp(\"updatedAt\");\n });\n};\n\nexports.down = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.dropColumn(\"updatedAt\");\n });\n};\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/package.json",
"content": "{\n \"name\": \"3_dealing_with_time\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\",\n \"start\": \"node server.js\"\n },\n \"devDependencies\": {\n \"@sinonjs/fake-timers\": \"github:sinonjs/fake-timers\",\n \"jest\": \"^26.6.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"nock\": \"^12.0.3\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"main\": \"alertController.spec.js\",\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"description\": \"\"\n}\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(3000) };\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"can fetch an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter5/1_eliminating_non_determinism/3_dealing_with_time/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter6/1_introducing_jsdom/1_pure_html/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Cheesecakes: 0 \n Add cheesecake \n \n \n\n"
},
{
"path": "chapter6/1_introducing_jsdom/1_pure_html/main.js",
"content": "let data = { cheesecakes: 0 };\n\nconst incrementCount = () => {\n data.cheesecakes++;\n window.document.getElementById(\"count\").innerText = data.cheesecakes;\n};\n\nconst incrementButton = window.document.getElementById(\"increment-button\");\nincrementButton.addEventListener(\"click\", incrementCount);\n"
},
{
"path": "chapter6/1_introducing_jsdom/2_jsdom/example.js",
"content": "const page = require(\"./page\");\n\nconsole.log(\"Initial page body:\");\nconsole.log(page.window.document.body.innerHTML);\n\nconsole.log(\"Initial contents of the count element:\");\nconsole.log(page.window.document.getElementById(\"count\").innerHTML);\n\n// Changing the count element's content\npage.window.document.getElementById(\"count\").innerHTML = 1337;\nconsole.log(\"Updated contents of the count element:\");\nconsole.log(page.window.document.getElementById(\"count\").innerHTML);\n\n// Appending a paragraph to the page\nconst paragraph = page.window.document.createElement(\"p\");\nparagraph.innerText = \"Look, I'm a new paragraph\";\npage.window.document.body.appendChild(paragraph);\n\nconsole.log(\"Final page body:\");\nconsole.log(page.window.document.body.innerHTML);\n"
},
{
"path": "chapter6/1_introducing_jsdom/2_jsdom/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Cheesecakes: 0 \n Add cheesecake \n \n \n\n"
},
{
"path": "chapter6/1_introducing_jsdom/2_jsdom/main.js",
"content": "let data = { cheesecakes: 0 };\n\nconst incrementCount = () => {\n data.cheesecakes++;\n window.document.getElementById(\"count\").innerText = data.cheesecakes;\n};\n\nconst incrementButton = window.document.getElementById(\"increment-button\");\nincrementButton.addEventListener(\"click\", incrementCount);\n"
},
{
"path": "chapter6/1_introducing_jsdom/2_jsdom/package.json",
"content": "{\n \"name\": \"2_jsdom\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"main.js\",\n \"scripts\": {\n \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"dependencies\": {\n \"jsdom\": \"^16.2.2\"\n }\n}\n"
},
{
"path": "chapter6/1_introducing_jsdom/2_jsdom/page.js",
"content": "const fs = require(\"fs\");\nconst { JSDOM } = require(\"jsdom\");\n\nconst html = fs.readFileSync(\"./index.html\");\nconst page = new JSDOM(html);\n\nmodule.exports = page;\n"
},
{
"path": "chapter6/1_introducing_jsdom/3_jest_jsdom/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Cheesecakes: 0 \n Add cheesecake \n \n \n\n"
},
{
"path": "chapter6/1_introducing_jsdom/3_jest_jsdom/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"jsdom\"\n};\n"
},
{
"path": "chapter6/1_introducing_jsdom/3_jest_jsdom/main.js",
"content": "let data = { cheesecakes: 0 };\n\nconst incrementCount = () => {\n data.cheesecakes++;\n window.document.getElementById(\"count\").innerText = data.cheesecakes;\n};\n\nconst incrementButton = window.document.getElementById(\"increment-button\");\nincrementButton.addEventListener(\"click\", incrementCount);\n\nmodule.exports = { incrementCount, data };\n"
},
{
"path": "chapter6/1_introducing_jsdom/3_jest_jsdom/main.test.js",
"content": "const fs = require(\"fs\");\nwindow.document.body.innerHTML = fs.readFileSync(\"./index.html\");\n\nconst { incrementCount, data } = require(\"./main\");\n\ndescribe(\"incrementCount\", () => {\n test(\"incrementing the count\", () => {\n data.cheesecakes = 0;\n incrementCount();\n expect(data.cheesecakes).toBe(1);\n });\n});\n"
},
{
"path": "chapter6/1_introducing_jsdom/3_jest_jsdom/package.json",
"content": "{\n \"name\": \"3_jest_jsdom\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"main.js\",\n \"scripts\": {\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"dependencies\": {},\n \"devDependencies\": {\n \"browserify\": \"^16.5.1\",\n \"jest\": \"^26.6.0\"\n }\n}\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/domController.js",
"content": "const updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n inventoryList.appendChild(listItem);\n });\n};\n\nmodule.exports = { updateItemList };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/domController.test.js",
"content": "const fs = require(\"fs\");\ndocument.body.innerHTML = fs.readFileSync(\"./index.html\");\n\nconst { updateItemList } = require(\"./domController\");\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.querySelector(\"body > ul\");\n expect(itemList.childNodes).toHaveLength(3);\n\n // The `childNodes` property has a `length`, but it's _not_ an Array\n const nodesText = Array.from(itemList.childNodes).map(\n node => node.innerHTML\n );\n expect(nodesText).toContain(\"cheesecake - Quantity: 5\");\n expect(nodesText).toContain(\"apple pie - Quantity: 2\");\n expect(nodesText).toContain(\"carrot cake - Quantity: 6\");\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Inventory Contents \n \n \n \n\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/main.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\naddItem(\"cheesecake\", 3);\naddItem(\"apple pie\", 8);\naddItem(\"carrot cake\", 7);\n\nupdateItemList(data.inventory);\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/1_finding_elements_by_dom_structure/package.json",
"content": "{\n \"name\": \"1_finding_elements_by_dom_structure\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/domController.js",
"content": "const updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n inventoryList.appendChild(listItem);\n });\n};\n\nmodule.exports = { updateItemList };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/domController.test.js",
"content": "const fs = require(\"fs\");\ndocument.body.innerHTML = fs.readFileSync(\"./index.html\");\n\nconst { updateItemList } = require(\"./domController\");\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n // The `childNodes` property has a `length`, but it's _not_ an Array\n const nodesText = Array.from(itemList.childNodes).map(\n node => node.innerHTML\n );\n expect(nodesText).toContain(\"cheesecake - Quantity: 5\");\n expect(nodesText).toContain(\"apple pie - Quantity: 2\");\n expect(nodesText).toContain(\"carrot cake - Quantity: 6\");\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Inventory Contents \n \n \n \n\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/main.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\naddItem(\"cheesecake\", 3);\naddItem(\"apple pie\", 8);\naddItem(\"carrot cake\", 7);\n\nupdateItemList(data.inventory);\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/2_finding_elements_by_id/package.json",
"content": "{\n \"name\": \"2_finding_elements_by_id\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/domController.js",
"content": "const updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n window.document.body.appendChild(p);\n};\n\nmodule.exports = { updateItemList };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\n\nconst { updateItemList } = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n // The `childNodes` property has a `length`, but it's _not_ an Array\n const nodesText = Array.from(itemList.childNodes).map(\n node => node.innerHTML\n );\n expect(nodesText).toContain(\"cheesecake - Quantity: 5\");\n expect(nodesText).toContain(\"apple pie - Quantity: 2\");\n expect(nodesText).toContain(\"carrot cake - Quantity: 6\");\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n const paragraphs = Array.from(document.querySelectorAll(\"p\"));\n const updateParagraphs = paragraphs.filter(p => {\n return p.innerHTML.includes(\"The inventory has been updated\");\n });\n\n expect(updateParagraphs).toHaveLength(1);\n expect(updateParagraphs[0].innerHTML).toBe(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n );\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Inventory Contents \n \n \n \n\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/main.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\naddItem(\"cheesecake\", 3);\naddItem(\"apple pie\", 8);\naddItem(\"carrot cake\", 7);\n\nupdateItemList(data.inventory);\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/3_robust_element_queries/package.json",
"content": "{\n \"name\": \"3_robust_element_queries\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/domController.js",
"content": "const updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n window.document.body.appendChild(p);\n};\n\nmodule.exports = { updateItemList };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst { updateItemList } = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeTruthy();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeTruthy();\n expect(getByText(itemList, \"carrot cake - Quantity: 6\")).toBeTruthy();\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/index.html",
"content": "\n\n \n Inventory Manager \n \n \n Inventory Contents \n \n \n \n\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/main.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\naddItem(\"cheesecake\", 3);\naddItem(\"apple pie\", 8);\naddItem(\"carrot cake\", 7);\n\nupdateItemList(data.inventory);\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/4_finding_with_dom_testing_library/package.json",
"content": "{\n \"name\": \"4_finding_with_dom_testing_library\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^26.6.0\"\n }\n}\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/domController.js",
"content": "const updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nmodule.exports = { updateItemList };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst { updateItemList } = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n \n \n\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\"./setupJestDom.js\"]\n};\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/main.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\naddItem(\"cheesecake\", 3);\naddItem(\"apple pie\", 8);\naddItem(\"carrot cake\", 7);\n\nupdateItemList(data.inventory);\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/package.json",
"content": "{\n \"name\": \"5_writing_better_dom_assertions\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/2_asserting_on_the_dom/5_writing_better_dom_assertions/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst handleItemName = event => {\n const itemName = event.target.value;\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n\n if (itemName === \"\") {\n errorMsg.innerHTML = \"\";\n } else if (!validItems.includes(itemName)) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n};\n\nmodule.exports = { updateItemList, handleAddItem, handleItemName };\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n handleItemName\n} = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n test(\"adding items to the page\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"handleItemName\", () => {\n test(\"entering valid item names\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: { value: \"cheesecake\" }\n };\n\n handleItemName(event);\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: { value: \"book\" }\n };\n\n handleItemName(event);\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n \n \n\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return data.inventory;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\"./setupJestDom.js\"]\n};\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/main.js",
"content": "const { handleAddItem, handleItemName } = require(\"./domController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\n\nconst itemInput = document.querySelector(`input[name=\"name\"]`);\nitemInput.addEventListener(\"input\", handleItemName);\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/main.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText } = require(\"@testing-library/dom\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n require(\"./main\");\n});\n\ntest(\"adding items through the form\", () => {\n screen.getByPlaceholderText(\"Item name\").value = \"cheesecake\";\n screen.getByPlaceholderText(\"Quantity\").value = \"6\";\n\n const event = new Event(\"submit\");\n const form = document.getElementById(\"add-item-form\");\n form.dispatchEvent(event);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n itemField.value = \"cheesecake\";\n const inputEvent = new Event(\"input\");\n\n itemField.dispatchEvent(inputEvent);\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n itemField.value = \"book\";\n const inputEvent = new Event(\"input\");\n\n itemField.dispatchEvent(inputEvent);\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/package.json",
"content": "{\n \"name\": \"1_handling_raw_events\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/3_handling_events/1_handling_raw_events/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst checkFormValues = () => {\n const itemName = document.querySelector(`input[name=\"name\"]`).value;\n const quantity = document.querySelector(`input[name=\"quantity\"]`).value;\n\n const itemNameIsEmpty = itemName === \"\";\n const itemNameIsInvalid = !validItems.includes(itemName);\n const quantityIsEmpty = quantity === \"\";\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n if (itemNameIsEmpty) {\n errorMsg.innerHTML = \"\";\n } else if (itemNameIsInvalid) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n\n const submitButton = document.querySelector(`button[type=\"submit\"]`);\n if (itemNameIsEmpty || itemNameIsInvalid || quantityIsEmpty) {\n submitButton.disabled = true;\n } else {\n submitButton.disabled = false;\n }\n};\n\nmodule.exports = { updateItemList, handleAddItem, checkFormValues };\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n checkFormValues\n} = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n test(\"adding items to the page\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"checkFormValues\", () => {\n test(\"entering valid item values\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeEnabled();\n });\n\n test(\"entering invalid item names\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"invalid\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n \n \n\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return data.inventory;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\"./setupJestDom.js\"]\n};\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/main.js",
"content": "const { handleAddItem, checkFormValues } = require(\"./domController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/main.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText } = require(\"@testing-library/dom\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n require(\"./main\");\n});\n\ntest(\"adding items through the form\", () => {\n screen.getByPlaceholderText(\"Item name\").value = \"cheesecake\";\n screen.getByPlaceholderText(\"Quantity\").value = \"6\";\n\n const event = new Event(\"submit\");\n const form = document.getElementById(\"add-item-form\");\n form.dispatchEvent(event);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n itemField.value = \"cheesecake\";\n const inputEvent = new Event(\"input\", { bubbles: true });\n\n itemField.dispatchEvent(inputEvent);\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n itemField.value = \"book\";\n const inputEvent = new Event(\"input\", { bubbles: true });\n\n itemField.dispatchEvent(inputEvent);\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/package.json",
"content": "{\n \"name\": \"1_handling_raw_events\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/3_handling_events/2_bubbling_up_events/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst checkFormValues = () => {\n const itemName = document.querySelector(`input[name=\"name\"]`).value;\n const quantity = document.querySelector(`input[name=\"quantity\"]`).value;\n\n const itemNameIsEmpty = itemName === \"\";\n const itemNameIsInvalid = !validItems.includes(itemName);\n const quantityIsEmpty = quantity === \"\";\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n if (itemNameIsEmpty) {\n errorMsg.innerHTML = \"\";\n } else if (itemNameIsInvalid) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n\n const submitButton = document.querySelector(`button[type=\"submit\"]`);\n if (itemNameIsEmpty || itemNameIsInvalid || quantityIsEmpty) {\n submitButton.disabled = true;\n } else {\n submitButton.disabled = false;\n }\n};\n\nmodule.exports = { updateItemList, handleAddItem, checkFormValues };\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n checkFormValues\n} = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n test(\"adding items to the page\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"checkFormValues\", () => {\n test(\"entering valid item values\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeEnabled();\n });\n\n test(\"entering invalid item names\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"invalid\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n \n \n\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return data.inventory;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\"./setupJestDom.js\"]\n};\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/main.js",
"content": "const { handleAddItem, checkFormValues } = require(\"./domController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/main.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText, fireEvent } = require(\"@testing-library/dom\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n require(\"./main\");\n});\n\ntest(\"adding items through the form\", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.click(submitBtn);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, { target: { value: \"book\" }, bubbles: true });\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/package.json",
"content": "{\n \"name\": \"1_handling_raw_events\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/3_handling_events/3_dom_testing_library_events/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n if (inventory === null) return;\n\n localStorage.setItem(\"inventory\", JSON.stringify(inventory));\n\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst checkFormValues = () => {\n const itemName = document.querySelector(`input[name=\"name\"]`).value;\n const quantity = document.querySelector(`input[name=\"quantity\"]`).value;\n\n const itemNameIsEmpty = itemName === \"\";\n const itemNameIsInvalid = !validItems.includes(itemName);\n const quantityIsEmpty = quantity === \"\";\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n if (itemNameIsEmpty) {\n errorMsg.innerHTML = \"\";\n } else if (itemNameIsInvalid) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n\n const submitButton = document.querySelector(`button[type=\"submit\"]`);\n if (itemNameIsEmpty || itemNameIsInvalid || quantityIsEmpty) {\n submitButton.disabled = true;\n } else {\n submitButton.disabled = false;\n }\n};\n\nmodule.exports = { updateItemList, handleAddItem, checkFormValues };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n checkFormValues\n} = require(\"./domController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n beforeEach(() => localStorage.clear());\n\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n\n test(\"updates the localStorage with the inventory\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify(inventory)\n );\n });\n\n test(\"does not update the inventory when passing null\", () => {\n localStorage.setItem(\"inventory\", JSON.stringify({ cheesecake: 5 }));\n updateItemList(null);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify({ cheesecake: 5 })\n );\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n test(\"adding items to the page\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"checkFormValues\", () => {\n test(\"entering valid item values\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeEnabled();\n });\n\n test(\"entering invalid item names\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"invalid\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n \n \n\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return data.inventory;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\"./setupJestDom.js\"]\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/main.js",
"content": "const {\n handleAddItem,\n checkFormValues,\n updateItemList\n} = require(\"./domController\");\n\nconst { data } = require(\"./inventoryController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n\n// Restore the inventory when the page loads\nconst storedInventory = JSON.parse(localStorage.getItem(\"inventory\"));\n\nif (storedInventory) {\n data.inventory = storedInventory;\n updateItemList(data.inventory);\n}\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/main.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText, fireEvent } = require(\"@testing-library/dom\");\n\nbeforeEach(() => localStorage.clear());\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n require(\"./main\");\n});\n\ntest(\"persists items between sessions\", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.click(submitBtn);\n\n const itemListBefore = document.getElementById(\"item-list\");\n expect(itemListBefore.childNodes).toHaveLength(1);\n expect(\n getByText(itemListBefore, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n\n // This is equivalent to reloading the page\n document.body.innerHTML = initialHtml;\n jest.resetModules();\n require(\"./main\");\n\n const itemListAfter = document.getElementById(\"item-list\");\n expect(itemListAfter.childNodes).toHaveLength(1);\n expect(\n getByText(itemListAfter, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n});\n\ndescribe(\"adding items\", () => {\n test(\"updating the item list\", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, { target: { value: \"book\" }, bubbles: true });\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/package.json",
"content": "{\n \"name\": \"2_localstorage\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/1_localstorage/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n if (inventory === null) return;\n\n localStorage.setItem(\"inventory\", JSON.stringify(inventory));\n\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n history.pushState({ inventory: { ...data.inventory } }, document.title);\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst checkFormValues = () => {\n const itemName = document.querySelector(`input[name=\"name\"]`).value;\n const quantity = document.querySelector(`input[name=\"quantity\"]`).value;\n\n const itemNameIsEmpty = itemName === \"\";\n const itemNameIsInvalid = !validItems.includes(itemName);\n const quantityIsEmpty = quantity === \"\";\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n if (itemNameIsEmpty) {\n errorMsg.innerHTML = \"\";\n } else if (itemNameIsInvalid) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n\n const submitButton = document.querySelector(`button[type=\"submit\"]`);\n if (itemNameIsEmpty || itemNameIsInvalid || quantityIsEmpty) {\n submitButton.disabled = true;\n } else {\n submitButton.disabled = false;\n }\n};\n\nconst handleUndo = () => {\n if (history.state === null) return;\n history.back();\n};\n\nconst handlePopstate = () => {\n data.inventory = history.state ? history.state.inventory : {};\n updateItemList(data.inventory);\n};\n\nmodule.exports = {\n updateItemList,\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/domController.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate\n} = require(\"./domController\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils\");\n\nconst { data } = require(\"./inventoryController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n beforeEach(() => localStorage.clear());\n\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n\n test(\"updates the localStorage with the inventory\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify(inventory)\n );\n });\n\n test(\"does not update the inventory when passing null\", () => {\n localStorage.setItem(\"inventory\", JSON.stringify({ cheesecake: 5 }));\n updateItemList(null);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify({ cheesecake: 5 })\n );\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n beforeEach(() => (data.inventory = {}));\n\n test(\"adding items to the page\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n\n test(\"updating the application's history\", () => {\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n });\n});\n\ndescribe(\"checkFormValues\", () => {\n test(\"entering valid item values\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeEnabled();\n });\n\n test(\"entering invalid item names\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"invalid\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n });\n});\n\ndescribe(\"tests with history\", () => {\n beforeEach(() => jest.spyOn(window, \"addEventListener\"));\n\n afterEach(detachPopstateHandlers);\n\n beforeEach(clearHistoryHook);\n\n describe(\"handleUndo\", () => {\n test(\"going back from a non-initial state\", done => {\n window.addEventListener(\"popstate\", () => {\n expect(history.state).toEqual(null);\n done();\n });\n\n history.pushState({ inventory: { cheesecake: 5 } }, \"title\");\n handleUndo();\n });\n\n test(\"going back from an initial state\", () => {\n jest.spyOn(history, \"back\");\n handleUndo();\n\n // This assertion doesn't care about whether\n // a call to `history.back` would have finished,\n // it only checks whether it's been called\n expect(history.back.mock.calls).toHaveLength(0);\n });\n });\n\n describe(\"handlePopstate\", () => {\n test(\"updating the item list with the current state\", () => {\n history.pushState(\n { inventory: { cheesecake: 5, \"carrot cake\": 2 } },\n \"title\"\n );\n\n handlePopstate();\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(2);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 5\")\n ).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 2\")\n ).toBeInTheDocument();\n });\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n\n Undo \n\n \n \n\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return data.inventory;\n};\n\nmodule.exports = { data, addItem };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/inventoryController.test.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n data.inventory = {};\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\"./setupJestDom.js\"]\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/main.js",
"content": "const {\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate,\n updateItemList\n} = require(\"./domController\");\n\nconst { data } = require(\"./inventoryController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\nconst undoButton = document.getElementById(\"undo-button\");\nundoButton.addEventListener(\"click\", handleUndo);\n\nwindow.addEventListener(\"popstate\", handlePopstate);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n\n// Restore the inventory when the page loads\nconst storedInventory = JSON.parse(localStorage.getItem(\"inventory\"));\n\nif (storedInventory) {\n data.inventory = storedInventory;\n updateItemList(data.inventory);\n}\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/main.test.js",
"content": "const fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText, fireEvent } = require(\"@testing-library/dom\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils.js\");\n\nbeforeEach(clearHistoryHook);\n\nbeforeEach(() => localStorage.clear());\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n require(\"./main\");\n\n // You can only spy on `window.addEventListener` after `main.js`\n // has been executed. Otherwise `detachPopstateHandlers` will\n // also detach the handlers that `main.js` attached to the page.\n jest.spyOn(window, \"addEventListener\");\n});\n\nafterEach(detachPopstateHandlers);\n\ntest(\"persists items between sessions\", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemListBefore = document.getElementById(\"item-list\");\n expect(itemListBefore.childNodes).toHaveLength(1);\n expect(\n getByText(itemListBefore, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n\n // This is equivalent to reloading the page\n document.body.innerHTML = initialHtml;\n jest.resetModules();\n require(\"./main\");\n\n const itemListAfter = document.getElementById(\"item-list\");\n expect(itemListAfter.childNodes).toHaveLength(1);\n expect(\n getByText(itemListAfter, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n});\n\ndescribe(\"adding items\", () => {\n test(\"updating the item list\", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n\n test(\"undo to one item\", done => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n fireEvent.input(itemField, {\n target: { value: \"carrot cake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"5\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.children).toHaveLength(1);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n\n test(\"undo to empty list\", done => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList).toBeEmpty();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, { target: { value: \"book\" }, bubbles: true });\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/package.json",
"content": "{\n \"name\": \"2_localstorage\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"jest\": \"^24.9.0\"\n }\n}\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/2_history_api/testUtils.js",
"content": "const clearHistoryHook = done => {\n const clearHistory = () => {\n if (history.state === null) {\n window.removeEventListener(\"popstate\", clearHistory);\n return done();\n }\n\n history.back();\n };\n\n window.addEventListener(\"popstate\", clearHistory);\n\n clearHistory();\n};\n\nconst detachPopstateHandlers = () => {\n const popstateListeners = window.addEventListener.mock.calls.filter(\n ([eventName]) => {\n return eventName === \"popstate\";\n }\n );\n\n popstateListeners.forEach(([eventName, handlerFn]) => {\n window.removeEventListener(eventName, handlerFn);\n });\n\n jest.restoreAllMocks();\n};\n\nmodule.exports = { clearHistoryHook, detachPopstateHandlers };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/README.md",
"content": "# Chapter 5 Server\n\nTo better support the client-side application we'll build on Chapter 5, I've had to do a few updates to the server from Chapter 4.\n\nIn case you want to update the back-end from Chapter 4 yourself, here's the list of changes I've done:\n\n- For the server to accept the requests coming from the client, you'll need to use [`@koa/cors`](https://github.com/koajs/cors)\n- To enable running tests while the server is running, I bind it to different ports depending on whether I am in a test or development environment.\n- At `POST /inventory/:itemName` I have added a route which adds an item to the inventory. It takes a `body` containing the `quantity` to add.\n- At `GET /inventory` I have added a route which lists all items in the inventory.\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .update({ updatedAt: new Date().toISOString() })\n .where({\n userId: itemEntry.userId,\n itemName\n });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1,\n updatedAt: new Date().toISOString()\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nconst hoursInMs = n => 1000 * 60 * 60 * n;\n\nconst removeStaleItems = async () => {\n const fourHoursAgo = new Date(Date.now() - hoursInMs(4)).toISOString();\n\n const staleItems = await db\n .select()\n .from(\"carts_items\")\n .where(\"updatedAt\", \"<\", fourHoursAgo);\n\n if (staleItems.length === 0) return;\n\n // Put stale items back in the inventory\n const inventoryUpdates = staleItems.map(staleItem =>\n db(\"inventory\")\n .increment(\"quantity\", staleItem.quantity)\n .where({ itemName: staleItem.itemName })\n );\n await Promise.all(inventoryUpdates);\n\n // Delete stale items from cart\n const staleItemTuples = staleItems.map(i => [i.itemName, i.userId]);\n await db(\"carts_items\")\n .del()\n .whereIn([\"itemName\", \"userId\"], staleItemTuples);\n};\n\nconst monitorStaleItems = () => setInterval(removeStaleItems, hoursInMs(2));\n\nmodule.exports = { addItemToCart, monitorStaleItems };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart, monitorStaleItems } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst FakeTimers = require(\"@sinonjs/fake-timers\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n\nconst withRetries = async fn => {\n // Capture the assertion error since Jest does not export it\n const JestAssertionError = (() => {\n try {\n expect(false).toBe(true);\n } catch (e) {\n return e.constructor;\n }\n })();\n\n try {\n await fn();\n } catch (e) {\n if (e.constructor === JestAssertionError) {\n // Wait 100ms before retrying\n await new Promise(resolve => setTimeout(resolve, 100));\n await withRetries(fn);\n } else {\n throw e;\n }\n }\n};\n\ndescribe(\"timers\", () => {\n const hoursInMs = n => 1000 * 60 * 60 * n;\n\n let clock;\n beforeEach(() => {\n clock = FakeTimers.install({ toFake: [\"Date\", \"setInterval\"] });\n });\n\n afterEach(() => {\n clock = clock.uninstall();\n });\n\n test(\"removing stale items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n clock.tick(hoursInMs(4));\n timer = monitorStaleItems();\n clock.tick(hoursInMs(2));\n\n await withRetries(async () => {\n const finalCartContent = await db\n .select()\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n });\n\n await withRetries(async () => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\");\n\n expect(inventoryContent).toEqual([\n { itemName: \"cheesecake\", quantity: 1 }\n ]);\n });\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst db = require(\"knex\")(require(\"./knexfile\")[environmentName]);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/migrations/20200331210311_updatedAt_field.js",
"content": "exports.up = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.timestamp(\"updatedAt\");\n });\n};\n\nexports.down = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.dropColumn(\"updatedAt\");\n });\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/package.json",
"content": "{\n \"name\": \"4_integrations_with_other_apis\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\",\n \"start\": \"cross-env NODE_ENV=development node server.js\",\n \"migrate:dev\": \"knex migrate:latest --env development\",\n \"seed:dev\": \"knex seed:run\"\n },\n \"devDependencies\": {\n \"@sinonjs/fake-timers\": \"github:sinonjs/fake-timers\",\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"@koa/cors\": \"^3.0.0\",\n \"cross-env\": \"^7.0.2\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"nock\": \"^12.0.3\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"main\": \"alertController.spec.js\",\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"description\": \"\"\n}\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/seeds/initial_inventory.js",
"content": "exports.seed = async knex => {\n await knex(\"inventory\").del();\n return knex(\"inventory\").insert([\n { itemName: \"cheesecake\", quantity: 8 },\n { itemName: \"apple pie\", quantity: 2 },\n { itemName: \"carrot cake\", quantity: 5 }\n ]);\n};\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst cors = require(\"@koa/cors\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst PORT = process.env.NODE_ENV === \"test\" ? 5000 : 3000;\n\nconst app = new Koa();\nconst router = new Router();\n\napp.use(cors());\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.post(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const itemExists = current && current.quantity > 0;\n const newRecord = {\n itemName,\n quantity: (itemExists ? current.quantity : 0) + quantity\n };\n\n if (current) {\n await db(\"inventory\")\n .increment(\"quantity\", quantity)\n .where({ itemName });\n } else {\n await db(\"inventory\").insert(newRecord);\n }\n\n ctx.body = newRecord;\n});\n\nrouter.get(\"/inventory\", async ctx => {\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"quantity\", \">\", 0)\n .orderBy(\"quantity\", \"desc\");\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(PORT) };\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"list inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n const carrotCake = { itemName: \"carrot cake\", quantity: 0 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie, carrotCake]);\n });\n\n test(\"fetching all available items\", async () => {\n const { body } = await request(app)\n .get(\"/inventory\")\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual([eggs, applePie]);\n });\n});\n\ndescribe(\"add inventory items\", () => {\n test(\"adding a new item\", async () => {\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 3 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"adding an existing item\", async () => {\n const eggs = { itemName: \"eggs\", quantity: 2 };\n await db(\"inventory\").insert(eggs);\n\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 5 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 5 });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"fetching an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter6/4_testing_and_browser_apis/server/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n if (inventory === null) return;\n\n localStorage.setItem(\"inventory\", JSON.stringify(inventory));\n\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n history.pushState({ inventory: { ...data.inventory } }, document.title);\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst checkFormValues = () => {\n const itemName = document.querySelector(`input[name=\"name\"]`).value;\n const quantity = document.querySelector(`input[name=\"quantity\"]`).value;\n\n const itemNameIsEmpty = itemName === \"\";\n const itemNameIsInvalid = !validItems.includes(itemName);\n const quantityIsEmpty = quantity === \"\";\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n if (itemNameIsEmpty) {\n errorMsg.innerHTML = \"\";\n } else if (itemNameIsInvalid) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n\n const submitButton = document.querySelector(`button[type=\"submit\"]`);\n if (itemNameIsEmpty || itemNameIsInvalid || quantityIsEmpty) {\n submitButton.disabled = true;\n } else {\n submitButton.disabled = false;\n }\n};\n\nconst handleUndo = () => {\n if (history.state === null) return;\n history.back();\n};\n\nconst handlePopstate = () => {\n data.inventory = history.state ? history.state.inventory : {};\n updateItemList(data.inventory);\n};\n\nmodule.exports = {\n updateItemList,\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/domController.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate\n} = require(\"./domController\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils\");\n\nconst { API_ADDR, data } = require(\"./inventoryController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n beforeEach(() => localStorage.clear());\n\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n\n test(\"updates the localStorage with the inventory\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify(inventory)\n );\n });\n\n test(\"does not update the inventory when passing null\", () => {\n localStorage.setItem(\"inventory\", JSON.stringify({ cheesecake: 5 }));\n updateItemList(null);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify({ cheesecake: 5 })\n );\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n beforeEach(() => (data.inventory = {}));\n\n test(\"adding items to the page\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 6 }))\n .reply(200);\n\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n\n if (!nock.isDone())\n throw new Error(\"POST /inventory/cheesecake was not reached\");\n });\n\n test(\"updating the application's history\", () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n });\n});\n\ndescribe(\"checkFormValues\", () => {\n test(\"entering valid item values\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeEnabled();\n });\n\n test(\"entering invalid item names\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"invalid\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n });\n});\n\ndescribe(\"tests with history\", () => {\n beforeEach(() => jest.spyOn(window, \"addEventListener\"));\n\n afterEach(detachPopstateHandlers);\n\n beforeEach(clearHistoryHook);\n\n describe(\"handleUndo\", () => {\n test(\"going back from a non-initial state\", done => {\n window.addEventListener(\"popstate\", () => {\n expect(history.state).toEqual(null);\n done();\n });\n\n history.pushState({ inventory: { cheesecake: 5 } }, \"title\");\n handleUndo();\n });\n\n test(\"going back from an initial state\", () => {\n jest.spyOn(history, \"back\");\n handleUndo();\n\n // This assertion doesn't care about whether\n // a call to `history.back` would have finished,\n // it only checks whether it's been called\n expect(history.back.mock.calls).toHaveLength(0);\n });\n });\n\n describe(\"handlePopstate\", () => {\n test(\"updating the item list with the current state\", () => {\n history.pushState(\n { inventory: { cheesecake: 5, \"carrot cake\": 2 } },\n \"title\"\n );\n\n handlePopstate();\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(2);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 5\")\n ).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 2\")\n ).toBeInTheDocument();\n });\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n\n Undo \n\n \n \n\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst API_ADDR = \"http://localhost:3000\";\n\nconst addItem = (itemName, quantity) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n\n fetch(`${API_ADDR}/inventory/${itemName}`, {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ quantity })\n });\n\n return data.inventory;\n};\n\nmodule.exports = { API_ADDR, data, addItem };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/inventoryController.test.js",
"content": "const nock = require(\"nock\");\nconst { API_ADDR, addItem, data } = require(\"./inventoryController\");\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n // Respond to all post requests\n // to POST /inventory/:itemName\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n\n test(\"sending requests when adding new items\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 5 }))\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n\n if (!nock.isDone())\n throw new Error(\"POST /inventory/cheesecake was not reached\");\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\n \"/setupGlobalFetch.js\",\n \"/setupJestDom.js\"\n ]\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/main.js",
"content": "const {\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate,\n updateItemList\n} = require(\"./domController\");\n\nconst { API_ADDR, data } = require(\"./inventoryController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\nconst undoButton = document.getElementById(\"undo-button\");\nundoButton.addEventListener(\"click\", handleUndo);\n\nwindow.addEventListener(\"popstate\", handlePopstate);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n\nconst loadInitialData = async () => {\n try {\n const inventoryResponse = await fetch(`${API_ADDR}/inventory`);\n data.inventory = await inventoryResponse.json();\n return updateItemList(data.inventory);\n } catch (e) {\n // Restore the inventory if the request fails\n const storedInventory = JSON.parse(localStorage.getItem(\"inventory\"));\n\n if (storedInventory) {\n data.inventory = storedInventory;\n updateItemList(data.inventory);\n }\n }\n};\n\nmodule.exports = loadInitialData();\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/main.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText, fireEvent } = require(\"@testing-library/dom\");\nconst { API_ADDR } = require(\"./inventoryController\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils.js\");\n\nbeforeEach(clearHistoryHook);\n\nbeforeEach(() => localStorage.clear());\n\nbeforeEach(async () => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n\n nock(API_ADDR)\n .get(\"/inventory\")\n .replyWithError({ code: 500 });\n await require(\"./main\");\n\n // You can only spy on `window.addEventListener` after `main.js`\n // has been executed. Otherwise `detachPopstateHandlers` will\n // also detach the handlers that `main.js` attached to the page.\n jest.spyOn(window, \"addEventListener\");\n});\n\nafterEach(detachPopstateHandlers);\n\nafterEach(() => {\n if (!nock.isDone()) {\n nock.cleanAll();\n throw new Error(\"Not all mocked endpoints received requests.\");\n }\n});\n\ntest(\"persists items between sessions\", async () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n nock(API_ADDR)\n .get(\"/inventory\")\n .replyWithError({ code: 500 });\n\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemListBefore = document.getElementById(\"item-list\");\n expect(itemListBefore.childNodes).toHaveLength(1);\n expect(\n getByText(itemListBefore, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n\n // This is equivalent to reloading the page\n document.body.innerHTML = initialHtml;\n jest.resetModules();\n\n await require(\"./main\");\n\n const itemListAfter = document.getElementById(\"item-list\");\n expect(itemListAfter.childNodes).toHaveLength(1);\n expect(\n getByText(itemListAfter, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n});\n\ndescribe(\"adding items\", () => {\n test(\"updating the item list\", () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n\n test(\"sending a request to update the item list\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 6 }))\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n if (!nock.isDone())\n throw new Error(\"POST /inventory/cheesecake was not reached\");\n });\n\n test(\"undo to one item\", done => {\n // You must specify the encoded URL here because\n // nock struggles with encoded urls\n nock(API_ADDR)\n .post(\"/inventory/carrot%20cake\")\n .reply(200);\n\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\")\n .reply(200);\n\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n fireEvent.input(itemField, {\n target: { value: \"carrot cake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"5\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.children).toHaveLength(1);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n\n test(\"undo to empty list\", done => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList).toBeEmpty();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, { target: { value: \"book\" }, bubbles: true });\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/package.json",
"content": "{\n \"name\": \"1_http_requests\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\",\n \"nock\": \"^12.0.3\"\n }\n}\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/1_http_requests/testUtils.js",
"content": "const clearHistoryHook = done => {\n const clearHistory = () => {\n if (history.state === null) {\n window.removeEventListener(\"popstate\", clearHistory);\n return done();\n }\n\n history.back();\n };\n\n window.addEventListener(\"popstate\", clearHistory);\n\n clearHistory();\n};\n\nconst detachPopstateHandlers = () => {\n const popstateListeners = window.addEventListener.mock.calls.filter(\n ([eventName]) => {\n return eventName === \"popstate\";\n }\n );\n\n popstateListeners.forEach(([eventName, handlerFn]) => {\n window.removeEventListener(eventName, handlerFn);\n });\n\n jest.restoreAllMocks();\n};\n\nmodule.exports = { clearHistoryHook, detachPopstateHandlers };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/domController.js",
"content": "const { addItem, data } = require(\"./inventoryController\");\n\nconst updateItemList = inventory => {\n if (inventory === null) return;\n\n localStorage.setItem(\"inventory\", JSON.stringify(inventory));\n\n const inventoryList = window.document.getElementById(\"item-list\");\n\n // Clears the list\n inventoryList.innerHTML = \"\";\n\n Object.entries(inventory).forEach(([itemName, quantity]) => {\n const listItem = window.document.createElement(\"li\");\n listItem.innerHTML = `${itemName} - Quantity: ${quantity}`;\n\n if (quantity < 5) {\n listItem.className = \"almost-soldout\";\n }\n\n inventoryList.appendChild(listItem);\n });\n\n const inventoryContents = JSON.stringify(inventory);\n const p = window.document.createElement(\"p\");\n p.innerHTML = `The inventory has been updated - ${inventoryContents}`;\n\n window.document.body.appendChild(p);\n};\n\nconst handleAddItem = event => {\n // Prevent the page from reloading as it would by default\n event.preventDefault();\n\n const { name, quantity } = event.target.elements;\n addItem(name.value, parseInt(quantity.value, 10));\n\n history.pushState({ inventory: { ...data.inventory } }, document.title);\n\n updateItemList(data.inventory);\n};\n\nconst validItems = [\"cheesecake\", \"apple pie\", \"carrot cake\"];\nconst checkFormValues = () => {\n const itemName = document.querySelector(`input[name=\"name\"]`).value;\n const quantity = document.querySelector(`input[name=\"quantity\"]`).value;\n\n const itemNameIsEmpty = itemName === \"\";\n const itemNameIsInvalid = !validItems.includes(itemName);\n const quantityIsEmpty = quantity === \"\";\n\n const errorMsg = window.document.getElementById(\"error-msg\");\n if (itemNameIsEmpty) {\n errorMsg.innerHTML = \"\";\n } else if (itemNameIsInvalid) {\n errorMsg.innerHTML = `${itemName} is not a valid item.`;\n } else {\n errorMsg.innerHTML = `${itemName} is valid!`;\n }\n\n const submitButton = document.querySelector(`button[type=\"submit\"]`);\n if (itemNameIsEmpty || itemNameIsInvalid || quantityIsEmpty) {\n submitButton.disabled = true;\n } else {\n submitButton.disabled = false;\n }\n};\n\nconst handleUndo = () => {\n if (history.state === null) return;\n history.back();\n};\n\nconst handlePopstate = () => {\n data.inventory = history.state ? history.state.inventory : {};\n updateItemList(data.inventory);\n};\n\nmodule.exports = {\n updateItemList,\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/domController.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText, screen } = require(\"@testing-library/dom\");\n\nconst {\n updateItemList,\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate\n} = require(\"./domController\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils\");\n\nconst { API_ADDR, data } = require(\"./inventoryController\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\ndescribe(\"updateItemList\", () => {\n beforeEach(() => localStorage.clear());\n\n test(\"updates the DOM with the inventory items\", () => {\n const inventory = {\n cheesecake: 5,\n \"apple pie\": 2,\n \"carrot cake\": 6\n };\n updateItemList(inventory);\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(3);\n\n expect(getByText(itemList, \"cheesecake - Quantity: 5\")).toBeInTheDocument();\n expect(getByText(itemList, \"apple pie - Quantity: 2\")).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 6\")\n ).toBeInTheDocument();\n });\n\n test(\"highlighting in red elements whose quantity is below five\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2, \"carrot cake\": 6 };\n updateItemList(inventory);\n\n expect(screen.getByText(\"apple pie - Quantity: 2\")).toHaveStyle({\n color: \"red\"\n });\n });\n\n test(\"adding a paragraph indicating what was the update\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(\n screen.getByText(\n `The inventory has been updated - ${JSON.stringify(inventory)}`\n )\n ).toBeTruthy();\n });\n\n test(\"updates the localStorage with the inventory\", () => {\n const inventory = { cheesecake: 5, \"apple pie\": 2 };\n updateItemList(inventory);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify(inventory)\n );\n });\n\n test(\"does not update the inventory when passing null\", () => {\n localStorage.setItem(\"inventory\", JSON.stringify({ cheesecake: 5 }));\n updateItemList(null);\n\n expect(localStorage.getItem(\"inventory\")).toEqual(\n JSON.stringify({ cheesecake: 5 })\n );\n });\n});\n\ndescribe(\"handleAddItem\", () => {\n beforeEach(() => (data.inventory = {}));\n\n test(\"adding items to the page\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 6 }))\n .reply(200);\n\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n // Checking if the form's default reload is prevent\n expect(event.preventDefault.mock.calls).toHaveLength(1);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n\n if (!nock.isDone())\n throw new Error(\"POST /inventory/cheesecake was not reached\");\n });\n\n test(\"updating the application's history\", () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const event = {\n preventDefault: jest.fn(),\n target: {\n elements: {\n name: { value: \"cheesecake\" },\n quantity: { value: \"6\" }\n }\n }\n };\n\n handleAddItem(event);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n });\n});\n\ndescribe(\"checkFormValues\", () => {\n test(\"entering valid item values\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeEnabled();\n });\n\n test(\"entering invalid item names\", () => {\n document.querySelector(`input[name=\"name\"]`).value = \"invalid\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"1\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n\n document.querySelector(`input[name=\"name\"]`).value = \"cheesecake\";\n document.querySelector(`input[name=\"quantity\"]`).value = \"\";\n checkFormValues();\n expect(screen.getByText(\"Add to inventory\")).toBeDisabled();\n });\n});\n\ndescribe(\"tests with history\", () => {\n beforeEach(() => jest.spyOn(window, \"addEventListener\"));\n\n afterEach(detachPopstateHandlers);\n\n beforeEach(clearHistoryHook);\n\n describe(\"handleUndo\", () => {\n test(\"going back from a non-initial state\", done => {\n window.addEventListener(\"popstate\", () => {\n expect(history.state).toEqual(null);\n done();\n });\n\n history.pushState({ inventory: { cheesecake: 5 } }, \"title\");\n handleUndo();\n });\n\n test(\"going back from an initial state\", () => {\n jest.spyOn(history, \"back\");\n handleUndo();\n\n // This assertion doesn't care about whether\n // a call to `history.back` would have finished,\n // it only checks whether it's been called\n expect(history.back.mock.calls).toHaveLength(0);\n });\n });\n\n describe(\"handlePopstate\", () => {\n test(\"updating the item list with the current state\", () => {\n history.pushState(\n { inventory: { cheesecake: 5, \"carrot cake\": 2 } },\n \"title\"\n );\n\n handlePopstate();\n\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(2);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 5\")\n ).toBeInTheDocument();\n expect(\n getByText(itemList, \"carrot cake - Quantity: 2\")\n ).toBeInTheDocument();\n });\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/index.html",
"content": "\n\n \n Inventory Manager \n \n \n \n Inventory Contents \n \n
\n \n\n Undo \n\n \n \n\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/inventoryController.js",
"content": "const data = { inventory: {} };\n\nconst API_ADDR = \"http://localhost:3000\";\n\nconst addItem = (itemName, quantity) => {\n const { client } = require(\"./socket\");\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n\n fetch(`${API_ADDR}/inventory/${itemName}`, {\n method: \"POST\",\n headers: {\n \"Content-Type\": \"application/json\",\n \"x-socket-client-id\": client.id\n },\n body: JSON.stringify({ quantity })\n });\n\n return data.inventory;\n};\n\nmodule.exports = { API_ADDR, data, addItem };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/inventoryController.test.js",
"content": "const nock = require(\"nock\");\nconst { API_ADDR, addItem, data } = require(\"./inventoryController\");\nconst { start, stop } = require(\"./testSocketServer\");\nconst { client, connect } = require(\"./socket\");\n\nafterEach(() => {\n if (!nock.isDone()) {\n nock.cleanAll();\n throw new Error(\"Not all mocked endpoints received requests.\");\n }\n});\n\ndescribe(\"addItem\", () => {\n test(\"adding new items to the inventory\", () => {\n // Respond to all post requests\n // to POST /inventory/:itemName\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n expect(data.inventory.cheesecake).toBe(5);\n });\n\n test(\"sending requests when adding new items\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 5 }))\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n });\n\n describe(\"live-updates\", () => {\n beforeAll(start);\n\n beforeAll(async () => {\n nock.cleanAll();\n await connect();\n });\n\n afterAll(stop);\n\n test(\"sending a x-socket-client-id header\", () => {\n const clientId = client.id;\n\n nock(API_ADDR, { reqheaders: { \"x-socket-client-id\": clientId } })\n .post(/inventory\\/.*$/)\n .reply(200);\n\n addItem(\"cheesecake\", 5);\n });\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/jest.config.js",
"content": "module.exports = {\n setupFilesAfterEnv: [\n \"/setupGlobalFetch.js\",\n \"/setupJestDom.js\"\n ]\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/main.js",
"content": "const { connect } = require(\"./socket\");\n\nconst {\n handleAddItem,\n checkFormValues,\n handleUndo,\n handlePopstate,\n updateItemList\n} = require(\"./domController\");\n\nconst { API_ADDR, data } = require(\"./inventoryController\");\n\nconst form = document.getElementById(\"add-item-form\");\nform.addEventListener(\"submit\", handleAddItem);\nform.addEventListener(\"input\", checkFormValues);\n\nconst undoButton = document.getElementById(\"undo-button\");\nundoButton.addEventListener(\"click\", handleUndo);\n\nwindow.addEventListener(\"popstate\", handlePopstate);\n\n// Run `checkFormValues` once to see if the initial state is valid\ncheckFormValues();\n\nconst loadInitialData = async () => {\n try {\n const inventoryResponse = await fetch(`${API_ADDR}/inventory`);\n data.inventory = await inventoryResponse.json();\n return updateItemList(data.inventory);\n } catch (e) {\n // Restore the inventory if the request fails\n const storedInventory = JSON.parse(localStorage.getItem(\"inventory\"));\n\n if (storedInventory) {\n data.inventory = storedInventory;\n updateItemList(data.inventory);\n }\n }\n};\n\nconnect();\n\nmodule.exports = loadInitialData();\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/main.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { screen, getByText, fireEvent } = require(\"@testing-library/dom\");\nconst { API_ADDR } = require(\"./inventoryController\");\n\nconst { clearHistoryHook, detachPopstateHandlers } = require(\"./testUtils.js\");\n\nbeforeEach(clearHistoryHook);\n\nbeforeEach(() => localStorage.clear());\n\nbeforeEach(async () => {\n document.body.innerHTML = initialHtml;\n\n // You must execute main.js again so that it can attach the\n // event listener to the form every time the body changes.\n // Here you must use `jest.resetModules` because otherwise\n // Jest will have cached `main.js` and it will _not_ run again.\n jest.resetModules();\n\n nock(API_ADDR)\n .get(\"/inventory\")\n .replyWithError({ code: 500 });\n await require(\"./main\");\n\n // You can only spy on `window.addEventListener` after `main.js`\n // has been executed. Otherwise `detachPopstateHandlers` will\n // also detach the handlers that `main.js` attached to the page.\n jest.spyOn(window, \"addEventListener\");\n});\n\nafterEach(detachPopstateHandlers);\n\nafterEach(() => {\n if (!nock.isDone()) {\n nock.cleanAll();\n throw new Error(\"Not all mocked endpoints received requests.\");\n }\n});\n\ntest(\"persists items between sessions\", async () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n nock(API_ADDR)\n .get(\"/inventory\")\n .replyWithError({ code: 500 });\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemListBefore = document.getElementById(\"item-list\");\n expect(itemListBefore.childNodes).toHaveLength(1);\n expect(\n getByText(itemListBefore, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n\n // This is equivalent to reloading the page\n document.body.innerHTML = initialHtml;\n jest.resetModules();\n\n await require(\"./main\");\n\n const itemListAfter = document.getElementById(\"item-list\");\n expect(itemListAfter.childNodes).toHaveLength(1);\n expect(\n getByText(itemListAfter, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n});\n\ndescribe(\"adding items\", () => {\n test(\"updating the item list\", () => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n const itemList = document.getElementById(\"item-list\");\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n\n test(\"sending a request to update the item list\", () => {\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\", JSON.stringify({ quantity: 6 }))\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n if (!nock.isDone())\n throw new Error(\"POST /inventory/cheesecake was not reached\");\n });\n\n test(\"undo to one item\", done => {\n // You must specify the encoded URL here because\n // nock struggles with encoded urls\n nock(API_ADDR)\n .post(\"/inventory/carrot%20cake\")\n .reply(200);\n\n nock(API_ADDR)\n .post(\"/inventory/cheesecake\")\n .reply(200);\n\n const itemField = screen.getByPlaceholderText(\"Item name\");\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n const submitBtn = screen.getByText(\"Add to inventory\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n fireEvent.input(itemField, {\n target: { value: \"carrot cake\" },\n bubbles: true\n });\n fireEvent.input(quantityField, { target: { value: \"5\" }, bubbles: true });\n fireEvent.click(submitBtn);\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.children).toHaveLength(1);\n expect(\n getByText(itemList, \"cheesecake - Quantity: 6\")\n ).toBeInTheDocument();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n\n test(\"undo to empty list\", done => {\n nock(API_ADDR)\n .post(/inventory\\/.*$/)\n .reply(200);\n\n const submitBtn = screen.getByText(\"Add to inventory\");\n const itemField = screen.getByPlaceholderText(\"Item name\");\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n const quantityField = screen.getByPlaceholderText(\"Quantity\");\n fireEvent.input(quantityField, { target: { value: \"6\" }, bubbles: true });\n\n fireEvent.click(submitBtn);\n\n expect(history.state).toEqual({ inventory: { cheesecake: 6 } });\n\n window.addEventListener(\"popstate\", () => {\n const itemList = document.getElementById(\"item-list\");\n expect(itemList).toBeEmpty();\n done();\n });\n\n fireEvent.click(screen.getByText(\"Undo\"));\n });\n});\n\ndescribe(\"item name validation\", () => {\n test(\"entering valid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, {\n target: { value: \"cheesecake\" },\n bubbles: true\n });\n\n expect(screen.getByText(\"cheesecake is valid!\")).toBeInTheDocument();\n });\n\n test(\"entering invalid item names \", () => {\n const itemField = screen.getByPlaceholderText(\"Item name\");\n\n fireEvent.input(itemField, { target: { value: \"book\" }, bubbles: true });\n\n expect(screen.getByText(\"book is not a valid item.\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/package.json",
"content": "{\n \"name\": \"1_http_requests\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"start\": \"http-server ./\",\n \"test\": \"jest\",\n \"build\": \"browserify main.js -o bundle.js\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@testing-library/dom\": \"^7.2.2\",\n \"@testing-library/jest-dom\": \"^5.5.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.1\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^24.9.0\",\n \"nock\": \"^12.0.3\",\n \"socket.io\": \"^2.3.0\"\n },\n \"dependencies\": {\n \"http-shutdown\": \"^1.2.2\",\n \"socket.io-client\": \"^2.3.0\"\n }\n}\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/socket.js",
"content": "const { API_ADDR, data } = require(\"./inventoryController\");\nconst { updateItemList } = require(\"./domController\");\n\nconst client = { id: null };\n\nconst io = require(\"socket.io-client\");\n\nconst handleAddItemMsg = ({ itemName, quantity }) => {\n const currentQuantity = data.inventory[itemName] || 0;\n data.inventory[itemName] = currentQuantity + quantity;\n return updateItemList(data.inventory);\n};\n\nconst connect = () => {\n return new Promise(resolve => {\n const socket = io(API_ADDR);\n\n socket.on(\"connect\", () => {\n client.id = socket.id;\n resolve(socket);\n });\n\n socket.on(\"add_item\", handleAddItemMsg);\n });\n};\n\nmodule.exports = { client, connect, handleAddItemMsg };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/socket.test.js",
"content": "const nock = require(\"nock\");\nconst fs = require(\"fs\");\nconst initialHtml = fs.readFileSync(\"./index.html\");\nconst { getByText } = require(\"@testing-library/dom\");\nconst { data } = require(\"./inventoryController\");\nconst { start, stop, sendMsg } = require(\"./testSocketServer\");\n\nconst { handleAddItemMsg, connect } = require(\"./socket\");\n\nbeforeEach(() => {\n document.body.innerHTML = initialHtml;\n});\n\nbeforeEach(() => {\n data.inventory = {};\n});\n\ndescribe(\"handleAddItemMsg\", () => {\n test(\"updating the inventory and the item list\", () => {\n handleAddItemMsg({ itemName: \"cheesecake\", quantity: 6 });\n\n expect(data.inventory).toEqual({ cheesecake: 6 });\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(1);\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n\ndescribe(\"handling real messages\", () => {\n beforeAll(start);\n\n beforeAll(async () => {\n nock.cleanAll();\n await connect();\n });\n\n afterAll(stop);\n\n test(\"handling add_item messages\", async () => {\n sendMsg(\"add_item\", { itemName: \"cheesecake\", quantity: 6 });\n\n await new Promise(resolve => setTimeout(resolve, 1000));\n\n expect(data.inventory).toEqual({ cheesecake: 6 });\n const itemList = document.getElementById(\"item-list\");\n expect(itemList.childNodes).toHaveLength(1);\n expect(getByText(itemList, \"cheesecake - Quantity: 6\")).toBeInTheDocument();\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/testSocketServer.js",
"content": "const server = require(\"http\").createServer();\nconst io = require(\"socket.io\")(server);\n\nconst sendMsg = (msgType, content) => {\n io.sockets.emit(msgType, content);\n};\n\nconst start = () =>\n new Promise(resolve => {\n server.listen(3000, resolve);\n });\n\nconst stop = () =>\n new Promise(resolve => {\n server.close(resolve);\n });\n\nmodule.exports = { start, stop, sendMsg };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/2_web_sockets/testUtils.js",
"content": "const clearHistoryHook = done => {\n const clearHistory = () => {\n if (history.state === null) {\n window.removeEventListener(\"popstate\", clearHistory);\n return done();\n }\n\n history.back();\n };\n\n window.addEventListener(\"popstate\", clearHistory);\n\n clearHistory();\n};\n\nconst detachPopstateHandlers = () => {\n const popstateListeners = window.addEventListener.mock.calls.filter(\n ([eventName]) => {\n return eventName === \"popstate\";\n }\n );\n\n popstateListeners.forEach(([eventName, handlerFn]) => {\n window.removeEventListener(eventName, handlerFn);\n });\n\n jest.restoreAllMocks();\n};\n\nmodule.exports = { clearHistoryHook, detachPopstateHandlers };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/README.md",
"content": "# Chapter 5 Server\n\nTo better support the client-side application we'll build on Chapter 5, I've had to do a few updates to the server from Chapter 4.\n\nIn case you want to update the back-end from Chapter 4 yourself, here's the list of changes I've done:\n\n- For the server to accept the requests coming from the client, you'll need to use [`@koa/cors`](https://github.com/koajs/cors)\n- To enable running tests while the server is running, I bind it to different ports depending on whether I am in a test or development environment.\n- At `POST /inventory/:itemName` I have added a route which adds an item to the inventory. It takes a `body` containing the `quantity` to add.\n- At `GET /inventory` I have added a route which lists all items in the inventory.\n- At `DELETE /inventory/:itemName` I have added a route which let's you delete inventory items so that you can use to fix the `undo` functionality\n- I've used `koa-socket-2` to add support for `socket.io`\n- The `POST /inventory/:itemName` will now push updates to all clients but the one which added an item.\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .update({ updatedAt: new Date().toISOString() })\n .where({\n userId: itemEntry.userId,\n itemName\n });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1,\n updatedAt: new Date().toISOString()\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nconst hoursInMs = n => 1000 * 60 * 60 * n;\n\nconst removeStaleItems = async () => {\n const fourHoursAgo = new Date(Date.now() - hoursInMs(4)).toISOString();\n\n const staleItems = await db\n .select()\n .from(\"carts_items\")\n .where(\"updatedAt\", \"<\", fourHoursAgo);\n\n if (staleItems.length === 0) return;\n\n // Put stale items back in the inventory\n const inventoryUpdates = staleItems.map(staleItem =>\n db(\"inventory\")\n .increment(\"quantity\", staleItem.quantity)\n .where({ itemName: staleItem.itemName })\n );\n await Promise.all(inventoryUpdates);\n\n // Delete stale items from cart\n const staleItemTuples = staleItems.map(i => [i.itemName, i.userId]);\n await db(\"carts_items\")\n .del()\n .whereIn([\"itemName\", \"userId\"], staleItemTuples);\n};\n\nconst monitorStaleItems = () => setInterval(removeStaleItems, hoursInMs(2));\n\nmodule.exports = { addItemToCart, monitorStaleItems };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart, monitorStaleItems } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst FakeTimers = require(\"@sinonjs/fake-timers\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n\nconst withRetries = async fn => {\n // Capture the assertion error since Jest does not export it\n const JestAssertionError = (() => {\n try {\n expect(false).toBe(true);\n } catch (e) {\n return e.constructor;\n }\n })();\n\n try {\n await fn();\n } catch (e) {\n if (e.constructor === JestAssertionError) {\n // Wait 100ms before retrying\n await new Promise(resolve => setTimeout(resolve, 100));\n await withRetries(fn);\n } else {\n throw e;\n }\n }\n};\n\ndescribe(\"timers\", () => {\n const hoursInMs = n => 1000 * 60 * 60 * n;\n\n let clock;\n beforeEach(() => {\n clock = FakeTimers.install({ toFake: [\"Date\", \"setInterval\"] });\n });\n\n afterEach(() => {\n clock = clock.uninstall();\n });\n\n test(\"removing stale items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n clock.tick(hoursInMs(4));\n timer = monitorStaleItems();\n clock.tick(hoursInMs(2));\n\n await withRetries(async () => {\n const finalCartContent = await db\n .select()\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n });\n\n await withRetries(async () => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\");\n\n expect(inventoryContent).toEqual([\n { itemName: \"cheesecake\", quantity: 1 }\n ]);\n });\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst db = require(\"knex\")(require(\"./knexfile\")[environmentName]);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/migrations/20200331210311_updatedAt_field.js",
"content": "exports.up = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.timestamp(\"updatedAt\");\n });\n};\n\nexports.down = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.dropColumn(\"updatedAt\");\n });\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/package.json",
"content": "{\n \"name\": \"chapter5_server\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\",\n \"start\": \"cross-env NODE_ENV=development node server.js\",\n \"migrate:dev\": \"knex migrate:latest --env development\",\n \"seed:dev\": \"knex seed:run\"\n },\n \"devDependencies\": {\n \"@sinonjs/fake-timers\": \"github:sinonjs/fake-timers\",\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"@koa/cors\": \"^3.0.0\",\n \"cross-env\": \"^7.0.2\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"koa-socket-2\": \"^1.2.0\",\n \"nock\": \"^12.0.3\",\n \"socket.io\": \"^2.3.0\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"main\": \"alertController.spec.js\",\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"description\": \"\"\n}\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/seeds/initial_inventory.js",
"content": "exports.seed = async knex => {\n await knex(\"inventory\").del();\n return knex(\"inventory\").insert([\n { itemName: \"cheesecake\", quantity: 8 },\n { itemName: \"apple pie\", quantity: 2 },\n { itemName: \"carrot cake\", quantity: 5 }\n ]);\n};\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst http = require(\"http\");\nconst IO = require(\"koa-socket-2\");\nconst cors = require(\"@koa/cors\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst PORT = process.env.NODE_ENV === \"test\" ? 5000 : 3000;\n\nconst app = new Koa();\nconst io = new IO();\nio.attach(app);\n\nconst router = new Router();\n\napp.use(cors());\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.post(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n const clientId = ctx.request.headers[\"x-socket-client-id\"];\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const itemExists = current && current.quantity > 0;\n const newRecord = {\n itemName,\n quantity: (itemExists ? current.quantity : 0) + quantity\n };\n\n if (current) {\n await db(\"inventory\")\n .increment(\"quantity\", quantity)\n .where({ itemName });\n } else {\n await db(\"inventory\").insert(newRecord);\n }\n\n Object.entries(io.socket.sockets.connected).forEach(([id, socket]) => {\n if (id === clientId) return;\n socket.emit(\"add_item\", { itemName, quantity });\n });\n\n ctx.body = newRecord;\n});\n\nrouter.delete(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const canDelete = current && current.quantity > quantity;\n\n if (canDelete) {\n await db(\"inventory\")\n .decrement(\"quantity\", quantity)\n .where({ itemName });\n ctx.body = { message: `Removed ${quantity} units of ${itemName}` };\n } else {\n ctx.status = 404;\n ctx.body = {\n message: `There aren't ${quantity} units of ${itemName} available.`\n };\n }\n});\n\nrouter.get(\"/inventory\", async ctx => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"quantity\", \">\", 0)\n .orderBy(\"quantity\", \"desc\");\n\n ctx.body = inventoryContent.reduce((acc, { itemName, quantity }) => {\n return { ...acc, [itemName]: quantity };\n }, {});\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(PORT, \"127.0.0.1\") };\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"list inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n const carrotCake = { itemName: \"carrot cake\", quantity: 0 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie, carrotCake]);\n });\n\n test(\"fetching all available items\", async () => {\n const { body } = await request(app)\n .get(\"/inventory\")\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ eggs: 3, \"apple pie\": 1 });\n });\n});\n\ndescribe(\"add inventory items\", () => {\n test(\"adding a new item\", async () => {\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 3 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"adding an existing item\", async () => {\n const eggs = { itemName: \"eggs\", quantity: 2 };\n await db(\"inventory\").insert(eggs);\n\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 5 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 5 });\n });\n});\n\ndescribe(\"remove inventory items\", () => {\n beforeEach(async () => {\n await db(\"inventory\").insert({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"removing an item\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 2 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"Removed 2 units of eggs\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 1 });\n });\n\n test(\"removing more than the inventory quantity\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 4 })\n .expect(404)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"There aren't 4 units of eggs available.\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"fetching an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter6/5_web_sockets_and_http_requests/server/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/1_createElement_calls/index.html",
"content": "\n\n \n Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/1_createElement_calls/index.js",
"content": "const ReactDOM = require(\"react-dom\");\nconst React = require(\"react\");\n\nconst header = React.createElement(\"h1\", null, \"Inventory Contents\");\nconst App = React.createElement(\"div\", null, header);\n\nReactDOM.render(App, document.getElementById(\"app\"));\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/1_createElement_calls/package.json",
"content": "{\n \"name\": \"1_createelement_calls\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.js -o bundle.js\",\n \"start\": \"http-server ./\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\"\n }\n}\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/2_transforming_jsx/index.html",
"content": "\n\n \n Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/2_transforming_jsx/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\n\nconst App = () => {\n return (\n \n
Inventory Contents \n \n );\n};\n\nReactDOM.render(\n
Inventory Contents \n \n );\n};\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/3_setting_up_jest/app.test.js",
"content": "import App from \"./App.jsx\";\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/3_setting_up_jest/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/3_setting_up_jest/index.html",
"content": "\n\n \n Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/3_setting_up_jest/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(\"\n // ],\n // Allows you to use a custom runner instead of Jest's default test runner\n // runner: \"jest-runner\",\n // The paths to modules that run some code to configure or set up the testing environment before each test\n // setupFiles: [],\n // A list of paths to modules that run some code to configure or set up the testing framework before each test\n // setupFilesAfterEnv: [],\n // A list of paths to snapshot serializer modules Jest should use for snapshot testing\n // snapshotSerializers: [],\n // The test environment that will be used for testing\n // testEnvironment: \"jest-environment-jsdom\",\n // Options that will be passed to the testEnvironment\n // testEnvironmentOptions: {},\n // Adds a location field to test results\n // testLocationInResults: false,\n // The glob patterns Jest uses to detect test files\n // testMatch: [\n // \"**/__tests__/**/*.[jt]s?(x)\",\n // \"**/?(*.)+(spec|test).[tj]s?(x)\"\n // ],\n // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped\n // testPathIgnorePatterns: [\n // \"/node_modules/\"\n // ],\n // The regexp pattern or array of patterns that Jest uses to detect test files\n // testRegex: [],\n // This option allows the use of a custom results processor\n // testResultsProcessor: undefined,\n // This option allows use of a custom test runner\n // testRunner: \"jasmine2\",\n // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href\n // testURL: \"http://localhost\",\n // Setting this value to \"fake\" allows the use of fake timers for functions such as \"setTimeout\"\n // timers: \"real\",\n // A map from regular expressions to paths to transformers\n // transform: undefined,\n // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation\n // transformIgnorePatterns: [\n // \"/node_modules/\"\n // ],\n // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them\n // unmockedModulePathPatterns: undefined,\n // Indicates whether each individual test should be reported during the run\n // verbose: undefined,\n // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode\n // watchPathIgnorePatterns: [],\n // Whether to use watchman for file crawling\n // watchman: true,\n};\n"
},
{
"path": "chapter7/1_setting_up_a_test_environment/3_setting_up_jest/package.json",
"content": "{\n \"name\": \"3_setting_up_jest\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.3\",\n \"jest\": \"^24.9\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n \"@babel/preset-env\",\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/1_react_testing_utilities/App.jsx",
"content": "import React from \"react\";\n\nexport const App = () => {\n const [cheesecakes, setCheesecake] = React.useState(0);\n return (\n \n
Inventory Contents \n
Cheesecakes: {cheesecakes}
\n
setCheesecake(cheesecakes + 1)}>\n Add cheesecake\n \n
Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/1_react_testing_utilities/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\"]\n};\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/1_react_testing_utilities/package.json",
"content": "{\n \"name\": \"1_react_testing_utilities\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"http-server\": \"^0.12.3\",\n \"jest\": \"^24.9\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n \"@babel/preset-env\",\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/1_react_testing_utilities/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/2_react_testing_library/App.jsx",
"content": "import React, { useEffect, useState, useRef } from \"react\";\nimport { API_ADDR } from \"./constants\";\nimport { ItemForm } from \"./ItemForm.jsx\";\nimport { ItemList } from \"./ItemList.jsx\";\n\nexport const App = () => {\n const [items, setItems] = useState({});\n const isMounted = useRef(null);\n\n useEffect(() => {\n isMounted.current = true;\n const loadItems = async () => {\n const response = await fetch(`${API_ADDR}/inventory`);\n const responseBody = await response.json();\n if (isMounted.current) setItems(responseBody);\n };\n loadItems();\n return () => (isMounted.current = false);\n }, []);\n\n return (\n \n
Inventory Contents \n \n {Object.entries(itemList).map(([itemName, quantity]) => {\n return (\n \n {itemName} - Quantity: {quantity}\n \n );\n })}\n \n );\n};\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/2_react_testing_library/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\ntest(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/2_react_testing_library/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/2_react_testing_library/package.json",
"content": "{\n \"name\": \"2_react-testing-library\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/2_react_testing_library/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter7/2_an_overview_of_react_testing_libraries/2_react_testing_library/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter7/server/README.md",
"content": "# Chapter 5 Server\n\nTo better support the client-side application we'll build on Chapter 5, I've had to do a few updates to the server from Chapter 4.\n\nIn case you want to update the back-end from Chapter 4 yourself, here's the list of changes I've done:\n\n- For the server to accept the requests coming from the client, you'll need to use [`@koa/cors`](https://github.com/koajs/cors)\n- To enable running tests while the server is running, I bind it to different ports depending on whether I am in a test or development environment.\n- At `POST /inventory/:itemName` I have added a route which adds an item to the inventory. It takes a `body` containing the `quantity` to add.\n- At `GET /inventory` I have added a route which lists all items in the inventory.\n- At `DELETE /inventory/:itemName` I have added a route which let's you delete inventory items so that you can use to fix the `undo` functionality\n- I've used `koa-socket-2` to add support for `socket.io`\n- The `POST /inventory/:itemName` will now push updates to all clients but the one which added an item.\n"
},
{
"path": "chapter7/server/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter7/server/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter7/server/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .update({ updatedAt: new Date().toISOString() })\n .where({\n userId: itemEntry.userId,\n itemName\n });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1,\n updatedAt: new Date().toISOString()\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nconst hoursInMs = n => 1000 * 60 * 60 * n;\n\nconst removeStaleItems = async () => {\n const fourHoursAgo = new Date(Date.now() - hoursInMs(4)).toISOString();\n\n const staleItems = await db\n .select()\n .from(\"carts_items\")\n .where(\"updatedAt\", \"<\", fourHoursAgo);\n\n if (staleItems.length === 0) return;\n\n // Put stale items back in the inventory\n const inventoryUpdates = staleItems.map(staleItem =>\n db(\"inventory\")\n .increment(\"quantity\", staleItem.quantity)\n .where({ itemName: staleItem.itemName })\n );\n await Promise.all(inventoryUpdates);\n\n // Delete stale items from cart\n const staleItemTuples = staleItems.map(i => [i.itemName, i.userId]);\n await db(\"carts_items\")\n .del()\n .whereIn([\"itemName\", \"userId\"], staleItemTuples);\n};\n\nconst monitorStaleItems = () => setInterval(removeStaleItems, hoursInMs(2));\n\nmodule.exports = { addItemToCart, monitorStaleItems };\n"
},
{
"path": "chapter7/server/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart, monitorStaleItems } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst FakeTimers = require(\"@sinonjs/fake-timers\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n\nconst withRetries = async fn => {\n // Capture the assertion error since Jest does not export it\n const JestAssertionError = (() => {\n try {\n expect(false).toBe(true);\n } catch (e) {\n return e.constructor;\n }\n })();\n\n try {\n await fn();\n } catch (e) {\n if (e.constructor === JestAssertionError) {\n // Wait 100ms before retrying\n await new Promise(resolve => setTimeout(resolve, 100));\n await withRetries(fn);\n } else {\n throw e;\n }\n }\n};\n\ndescribe(\"timers\", () => {\n const hoursInMs = n => 1000 * 60 * 60 * n;\n\n let clock;\n beforeEach(() => {\n clock = FakeTimers.install({ toFake: [\"Date\", \"setInterval\"] });\n });\n\n afterEach(() => {\n clock = clock.uninstall();\n });\n\n test(\"removing stale items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n clock.tick(hoursInMs(4));\n timer = monitorStaleItems();\n clock.tick(hoursInMs(2));\n\n await withRetries(async () => {\n const finalCartContent = await db\n .select()\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n });\n\n await withRetries(async () => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\");\n\n expect(inventoryContent).toEqual([\n { itemName: \"cheesecake\", quantity: 1 }\n ]);\n });\n });\n});\n"
},
{
"path": "chapter7/server/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst db = require(\"knex\")(require(\"./knexfile\")[environmentName]);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter7/server/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter7/server/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter7/server/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter7/server/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter7/server/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter7/server/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter7/server/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter7/server/migrations/20200331210311_updatedAt_field.js",
"content": "exports.up = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.timestamp(\"updatedAt\");\n });\n};\n\nexports.down = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.dropColumn(\"updatedAt\");\n });\n};\n"
},
{
"path": "chapter7/server/package.json",
"content": "{\n \"name\": \"chapter5_server\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\",\n \"start\": \"cross-env NODE_ENV=development node server.js\",\n \"migrate:dev\": \"knex migrate:latest --env development\",\n \"seed:dev\": \"knex seed:run\"\n },\n \"devDependencies\": {\n \"@sinonjs/fake-timers\": \"github:sinonjs/fake-timers\",\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"@koa/cors\": \"^3.0.0\",\n \"cross-env\": \"^7.0.2\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"koa-socket-2\": \"^1.2.0\",\n \"nock\": \"^12.0.3\",\n \"socket.io\": \"^2.3.0\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"main\": \"alertController.spec.js\",\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"description\": \"\"\n}\n"
},
{
"path": "chapter7/server/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter7/server/seeds/initial_inventory.js",
"content": "exports.seed = async knex => {\n await knex(\"inventory\").del();\n return knex(\"inventory\").insert([\n { itemName: \"cheesecake\", quantity: 8 },\n { itemName: \"apple pie\", quantity: 2 },\n { itemName: \"carrot cake\", quantity: 5 }\n ]);\n};\n"
},
{
"path": "chapter7/server/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst http = require(\"http\");\nconst IO = require(\"koa-socket-2\");\nconst cors = require(\"@koa/cors\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst PORT = process.env.NODE_ENV === \"test\" ? 5000 : 3000;\n\nconst app = new Koa();\nconst io = new IO();\nio.attach(app);\n\nconst router = new Router();\n\napp.use(cors());\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.post(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n const clientId = ctx.request.headers[\"x-socket-client-id\"];\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const itemExists = current && current.quantity > 0;\n const newRecord = {\n itemName,\n quantity: (itemExists ? current.quantity : 0) + quantity\n };\n\n if (current) {\n await db(\"inventory\")\n .increment(\"quantity\", quantity)\n .where({ itemName });\n } else {\n await db(\"inventory\").insert(newRecord);\n }\n\n Object.entries(io.socket.sockets.connected).forEach(([id, socket]) => {\n if (id === clientId) return;\n socket.emit(\"add_item\", { itemName, quantity });\n });\n\n ctx.body = newRecord;\n});\n\nrouter.delete(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const canDelete = current && current.quantity > quantity;\n\n if (canDelete) {\n await db(\"inventory\")\n .decrement(\"quantity\", quantity)\n .where({ itemName });\n ctx.body = { message: `Removed ${quantity} units of ${itemName}` };\n } else {\n ctx.status = 404;\n ctx.body = {\n message: `There aren't ${quantity} units of ${itemName} available.`\n };\n }\n});\n\nrouter.get(\"/inventory\", async ctx => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"quantity\", \">\", 0)\n .orderBy(\"quantity\", \"desc\");\n\n ctx.body = inventoryContent.reduce((acc, { itemName, quantity }) => {\n return { ...acc, [itemName]: quantity };\n }, {});\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(PORT, \"127.0.0.1\") };\n"
},
{
"path": "chapter7/server/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"list inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n const carrotCake = { itemName: \"carrot cake\", quantity: 0 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie, carrotCake]);\n });\n\n test(\"fetching all available items\", async () => {\n const { body } = await request(app)\n .get(\"/inventory\")\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ eggs: 3, \"apple pie\": 1 });\n });\n});\n\ndescribe(\"add inventory items\", () => {\n test(\"adding a new item\", async () => {\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 3 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"adding an existing item\", async () => {\n const eggs = { itemName: \"eggs\", quantity: 2 };\n await db(\"inventory\").insert(eggs);\n\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 5 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 5 });\n });\n});\n\ndescribe(\"remove inventory items\", () => {\n beforeEach(async () => {\n await db(\"inventory\").insert({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"removing an item\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 2 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"Removed 2 units of eggs\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 1 });\n });\n\n test(\"removing more than the inventory quantity\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 4 })\n .expect(404)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"There aren't 4 units of eggs available.\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"fetching an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter7/server/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter7/server/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter8/1_testing_component_interaction/1_component_integration_tests/App.jsx",
"content": "import React, { useEffect, useState, useRef } from \"react\";\nimport { API_ADDR } from \"./constants\";\nimport { ItemForm } from \"./ItemForm.jsx\";\nimport { ItemList } from \"./ItemList.jsx\";\n\nexport const App = () => {\n const [items, setItems] = useState({});\n const isMounted = useRef(null);\n\n useEffect(() => {\n isMounted.current = true;\n const loadItems = async () => {\n const response = await fetch(`${API_ADDR}/inventory`);\n const responseBody = await response.json();\n if (isMounted.current) setItems(responseBody);\n };\n loadItems();\n return () => (isMounted.current = false);\n }, []);\n\n const updateItems = (itemAdded, addedQuantity) => {\n const currentQuantity = items[itemAdded] || 0;\n setItems({ ...items, [itemAdded]: currentQuantity + addedQuantity });\n };\n\n return (\n \n
Inventory Contents \n \n {Object.entries(itemList).map(([itemName, quantity]) => {\n return {generateItemText(itemName, quantity)} ;\n })}\n \n );\n};\n"
},
{
"path": "chapter8/1_testing_component_interaction/1_component_integration_tests/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter8/1_testing_component_interaction/1_component_integration_tests/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/1_testing_component_interaction/1_component_integration_tests/package.json",
"content": "{\n \"name\": \"1_component_integration_tests\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/1_testing_component_interaction/1_component_integration_tests/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/1_testing_component_interaction/1_component_integration_tests/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/1_testing_component_interaction/2_stubbing_components/App.jsx",
"content": "import React, { useEffect, useState, useRef } from \"react\";\nimport { API_ADDR } from \"./constants\";\nimport { ItemForm } from \"./ItemForm.jsx\";\nimport { ItemList } from \"./ItemList.jsx\";\n\nexport const App = () => {\n const [items, setItems] = useState({});\n const isMounted = useRef(null);\n\n useEffect(() => {\n isMounted.current = true;\n const loadItems = async () => {\n const response = await fetch(`${API_ADDR}/inventory`);\n const responseBody = await response.json();\n if (isMounted.current) setItems(responseBody);\n };\n loadItems();\n return () => (isMounted.current = false);\n }, []);\n\n const updateItems = (itemAdded, addedQuantity) => {\n const currentQuantity = items[itemAdded] || 0;\n setItems({ ...items, [itemAdded]: currentQuantity + addedQuantity });\n };\n\n return (\n \n
Inventory Contents \n \n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/1_testing_component_interaction/2_stubbing_components/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\njest.mock(\"react-spring/renderprops\");\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter8/1_testing_component_interaction/2_stubbing_components/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/1_testing_component_interaction/2_stubbing_components/package.json",
"content": "{\n \"name\": \"2_stubbing_components\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/1_testing_component_interaction/2_stubbing_components/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/1_testing_component_interaction/2_stubbing_components/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/ActionLog.jsx",
"content": "import React from \"react\";\n\nexport const ActionLog = ({ actions }) => {\n return (\n \n
Action Log \n
\n {actions.map(({ time, message, data }, i) => {\n const date = new Date(time).toUTCString();\n return (\n \n Date: {date} - Message: {message} - Data: {JSON.stringify(data)}\n \n );\n })}\n \n
\n
Inventory Contents \n
\n
\n
\n
\n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n leave={{ fontSize: 0, opacity: 0 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\njest.mock(\"react-spring/renderprops\");\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(\n
\n \n Action Log\n \n \n \n Date: \n Fri, 02 Jan 1970 00:00:00 GMT\n - Message: \n Loaded item list\n - Data: \n {\"cheesecake\":2,\"macaroon\":5}\n \n \n Date: \n Sat, 03 Jan 1970 00:00:00 GMT\n - Message: \n Item added\n - Data: \n {\"cheesecake\":2}\n \n \n Date: \n Sun, 04 Jan 1970 00:00:00 GMT\n - Message: \n Item removed\n - Data: \n {\"cheesecake\":1}\n \n \n Date: \n Mon, 05 Jan 1970 00:00:00 GMT\n - Message: \n Something weird happened\n - Data: \n {\"error\":\"The cheesecake is a lie\"}\n \n \n \n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n Date: \n Sun, 21 Jun 2020 13:37:00 GMT\n - Message: \n Item added\n - Data: \n {\"itemAdded\":\"cheesecake\",\"addedQuantity\":6}\n \n \n\n`;\n\nexports[`updating the action log when loading items 1`] = `\n\n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n\n`;\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/constants.js",
"content": "export const API_ADDR = \"http://localhost:3000\";\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/index.html",
"content": "\n\n \n Inventory \n \n \n
\n \n \n\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/package.json",
"content": "{\n \"name\": \"1_component_snapshots\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/2_snapshot_testing/1_component_snapshots/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/2_snapshot_testing/2_snapshots_beyond_components/__snapshots__/generate_report.test.js.snap",
"content": "// Jest Snapshot v1, https://goo.gl/fbAQLP\n\nexports[`generating a .txt report 1`] = `\n\"cheesecake - Quantity: 8 - Value: 176\ncarrot cake - Quantity: 3 - Value: 54\nmacaroon - Quantity: 40 - Value: 240\nchocolate cake - Quantity: 12 - Value: 204\nTotal value: 63\"\n`;\n"
},
{
"path": "chapter8/2_snapshot_testing/2_snapshots_beyond_components/generate_report.js",
"content": "const fs = require(\"fs\");\n\nconst inventory = [\n { item: \"cheesecake\", quantity: 8, price: 22 },\n { item: \"carrot cake\", quantity: 3, price: 18 },\n { item: \"macaroon\", quantity: 40, price: 6 },\n { item: \"chocolate cake\", quantity: 12, price: 17 }\n];\n\nmodule.exports.generateReport = items => {\n const lines = items.map(({ item, quantity, price }) => {\n return `${item} - Quantity: ${quantity} - Value: ${price * quantity}`;\n });\n const totalValue = items.reduce((sum, { price }) => {\n return sum + price;\n }, 0);\n\n const content = lines.concat(`Total value: ${totalValue}`).join(\"\\n\");\n fs.writeFileSync(\"/tmp/report.txt\", content);\n};\n\nmodule.exports.generateReport(inventory);\n"
},
{
"path": "chapter8/2_snapshot_testing/2_snapshots_beyond_components/generate_report.test.js",
"content": "const fs = require(\"fs\");\nconst { generateReport } = require(\"./generate_report\");\n\ntest(\"generating a .txt report\", () => {\n const inventory = [\n { item: \"cheesecake\", quantity: 8, price: 22 },\n { item: \"carrot cake\", quantity: 3, price: 18 },\n { item: \"macaroon\", quantity: 40, price: 6 },\n { item: \"chocolate cake\", quantity: 12, price: 17 }\n ];\n\n generateReport(inventory);\n const report = fs.readFileSync(\"/tmp/report.txt\", \"utf-8\");\n expect(report).toMatchSnapshot();\n});\n"
},
{
"path": "chapter8/2_snapshot_testing/2_snapshots_beyond_components/package.json",
"content": "{\n \"name\": \"2_snapshots_beyond_components\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^25.5\"\n },\n \"dependencies\": {}\n}\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/ActionLog.jsx",
"content": "import React from \"react\";\n\nexport const ActionLog = ({ actions }) => {\n return (\n \n
Action Log \n
\n {actions.map(({ time, message, data }, i) => {\n const date = new Date(time).toUTCString();\n return (\n \n Date: {date} - Message: {message} - Data: {JSON.stringify(data)}\n \n );\n })}\n \n
\n
Inventory Contents \n
\n
\n
\n
\n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n leave={{ fontSize: 0, opacity: 0 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\njest.mock(\"react-spring/renderprops\");\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(\n
\n \n Action Log\n \n \n \n Date: \n Fri, 02 Jan 1970 00:00:00 GMT\n - Message: \n Loaded item list\n - Data: \n {\"cheesecake\":2,\"macaroon\":5}\n \n \n Date: \n Sat, 03 Jan 1970 00:00:00 GMT\n - Message: \n Item added\n - Data: \n {\"cheesecake\":2}\n \n \n Date: \n Sun, 04 Jan 1970 00:00:00 GMT\n - Message: \n Item removed\n - Data: \n {\"cheesecake\":1}\n \n \n Date: \n Mon, 05 Jan 1970 00:00:00 GMT\n - Message: \n Something weird happened\n - Data: \n {\"error\":\"The cheesecake is a lie\"}\n \n \n \n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n Date: \n Sun, 21 Jun 2020 13:37:00 GMT\n - Message: \n Item added\n - Data: \n {\"itemAdded\":\"cheesecake\",\"addedQuantity\":6}\n \n \n\n`;\n\nexports[`updating the action log when loading items 1`] = `\n\n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n\n`;\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/constants.js",
"content": "export const API_ADDR = \"http://localhost:3000\";\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/index.html",
"content": "\n\n \n Inventory \n
\n \n \n\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/package.json",
"content": "{\n \"name\": \"1_testing_styles\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/3_testing_styles/1_css_classes/styles.css",
"content": ".almost-out-of-stock {\n font-weight: bold;\n color: red;\n}\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/ActionLog.jsx",
"content": "import React from \"react\";\n\nexport const ActionLog = ({ actions }) => {\n return (\n \n
Action Log \n
\n {actions.map(({ time, message, data }, i) => {\n const date = new Date(time).toUTCString();\n return (\n \n Date: {date} - Message: {message} - Data: {JSON.stringify(data)}\n \n );\n })}\n \n
\n
Inventory Contents \n
\n
\n
\n
\n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n leave={{ fontSize: 0, opacity: 0 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\njest.mock(\"react-spring/renderprops\");\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(\n
\n \n Action Log\n \n \n \n Date: \n Fri, 02 Jan 1970 00:00:00 GMT\n - Message: \n Loaded item list\n - Data: \n {\"cheesecake\":2,\"macaroon\":5}\n \n \n Date: \n Sat, 03 Jan 1970 00:00:00 GMT\n - Message: \n Item added\n - Data: \n {\"cheesecake\":2}\n \n \n Date: \n Sun, 04 Jan 1970 00:00:00 GMT\n - Message: \n Item removed\n - Data: \n {\"cheesecake\":1}\n \n \n Date: \n Mon, 05 Jan 1970 00:00:00 GMT\n - Message: \n Something weird happened\n - Data: \n {\"error\":\"The cheesecake is a lie\"}\n \n \n \n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n Date: \n Sun, 21 Jun 2020 13:37:00 GMT\n - Message: \n Item added\n - Data: \n {\"itemAdded\":\"cheesecake\",\"addedQuantity\":6}\n \n \n\n`;\n\nexports[`updating the action log when loading items 1`] = `\n\n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n\n`;\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/constants.js",
"content": "export const API_ADDR = \"http://localhost:3000\";\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/index.html",
"content": "\n\n \n Inventory \n
\n \n \n\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/package.json",
"content": "{\n \"name\": \"1_testing_styles\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/3_testing_styles/2_style_props/styles.css",
"content": ".almost-out-of-stock {\n font-weight: bold;\n color: red;\n}\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/ActionLog.jsx",
"content": "import React from \"react\";\n\nexport const ActionLog = ({ actions }) => {\n return (\n \n
Action Log \n
\n {actions.map(({ time, message, data }, i) => {\n const date = new Date(time).toUTCString();\n return (\n \n Date: {date} - Message: {message} - Data: {JSON.stringify(data)}\n \n );\n })}\n \n
\n
Inventory Contents \n
\n
\n
\n
\n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n leave={{ fontSize: 0, opacity: 0 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\njest.mock(\"react-spring/renderprops\");\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(\n
\n \n Action Log\n \n \n \n Date: \n Fri, 02 Jan 1970 00:00:00 GMT\n - Message: \n Loaded item list\n - Data: \n {\"cheesecake\":2,\"macaroon\":5}\n \n \n Date: \n Sat, 03 Jan 1970 00:00:00 GMT\n - Message: \n Item added\n - Data: \n {\"cheesecake\":2}\n \n \n Date: \n Sun, 04 Jan 1970 00:00:00 GMT\n - Message: \n Item removed\n - Data: \n {\"cheesecake\":1}\n \n \n Date: \n Mon, 05 Jan 1970 00:00:00 GMT\n - Message: \n Something weird happened\n - Data: \n {\"error\":\"The cheesecake is a lie\"}\n \n \n \n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n Date: \n Sun, 21 Jun 2020 13:37:00 GMT\n - Message: \n Item added\n - Data: \n {\"itemAdded\":\"cheesecake\",\"addedQuantity\":6}\n \n \n\n`;\n\nexports[`updating the action log when loading items 1`] = `\n\n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n\n`;\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/__snapshots__/ItemList.test.jsx.snap",
"content": "// Jest Snapshot v1, https://goo.gl/fbAQLP\n\nexports[`ItemList Component highlighting items that are almost out of stock 1`] = `\n@keyframes animation-0 {\n 0% {\n opacity: .3;\n }\n\n 50% {\n opacity: 1;\n }\n\n 100% {\n opacity: .3;\n }\n}\n\n.emotion-0 {\n font-weight: bold;\n color: red;\n -webkit-animation: animation-0 2s infinite;\n animation: animation-0 2s infinite;\n}\n\n\n Cheesecake - Quantity: 2\n\n`;\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/constants.js",
"content": "export const API_ADDR = \"http://localhost:3000\";\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/index.html",
"content": "\n\n \n Inventory \n
\n \n \n\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupJestEmotion.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/package.json",
"content": "{\n \"name\": \"1_testing_styles\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"jest-emotion\": \"^10.0.32\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"@emotion/core\": \"^10.0.28\",\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/setupJestEmotion.js",
"content": "const { matchers } = require(\"jest-emotion\");\n\nexpect.extend(matchers);\n"
},
{
"path": "chapter8/3_testing_styles/3_css_in_js_snapshots/styles.css",
"content": ".almost-out-of-stock {\n font-weight: bold;\n color: red;\n}\n"
},
{
"path": "chapter8/4_component_stories/1_stories/.storybook/main.js",
"content": "module.exports = {\n stories: [\"../**/*.stories.jsx\"],\n addons: [\n \"@storybook/addon-actions/register\",\n \"@storybook/addon-knobs/register\"\n ],\n webpackFinal: async config => {\n return {\n ...config,\n resolve: {\n ...config.resolve,\n alias: {\n \"core-js/modules\": \"@storybook/core/node_modules/core-js/modules\",\n \"core-js/features\": \"@storybook/core/node_modules/core-js/features\"\n }\n }\n };\n }\n};\n"
},
{
"path": "chapter8/4_component_stories/1_stories/ActionLog.jsx",
"content": "import React from \"react\";\n\nexport const ActionLog = ({ actions }) => {\n return (\n \n
Action Log \n
\n {actions.map(({ time, message, data }, i) => {\n const date = new Date(time).toUTCString();\n return (\n \n Date: {date} - Message: {message} - Data: {JSON.stringify(data)}\n \n );\n })}\n \n
\n
Inventory Contents \n
\n
\n
\n
\n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n leave={{ fontSize: 0, opacity: 0 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/4_component_stories/1_stories/ItemList.stories.jsx",
"content": "import React from \"react\";\nimport { withKnobs, object } from \"@storybook/addon-knobs\";\nimport { ItemList } from \"./ItemList\";\n\nexport default {\n title: \"ItemList\",\n component: ItemList,\n includeStories: [\"staticItemList\", \"animatedItems\"],\n decorators: [withKnobs]\n};\n\nexport const staticItemList = () => (\n \n
\n \n Action Log\n \n \n \n Date: \n Fri, 02 Jan 1970 00:00:00 GMT\n - Message: \n Loaded item list\n - Data: \n {\"cheesecake\":2,\"macaroon\":5}\n \n \n Date: \n Sat, 03 Jan 1970 00:00:00 GMT\n - Message: \n Item added\n - Data: \n {\"cheesecake\":2}\n \n \n Date: \n Sun, 04 Jan 1970 00:00:00 GMT\n - Message: \n Item removed\n - Data: \n {\"cheesecake\":1}\n \n \n Date: \n Mon, 05 Jan 1970 00:00:00 GMT\n - Message: \n Something weird happened\n - Data: \n {\"error\":\"The cheesecake is a lie\"}\n \n \n \n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n Date: \n Sun, 21 Jun 2020 13:37:00 GMT\n - Message: \n Item added\n - Data: \n {\"itemAdded\":\"cheesecake\",\"addedQuantity\":6}\n \n \n\n`;\n\nexports[`updating the action log when loading items 1`] = `\n\n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n\n`;\n"
},
{
"path": "chapter8/4_component_stories/1_stories/__snapshots__/ItemList.test.jsx.snap",
"content": "// Jest Snapshot v1, https://goo.gl/fbAQLP\n\nexports[`ItemList Component highlighting items that are almost out of stock 1`] = `\n@keyframes animation-0 {\n 0% {\n opacity: .3;\n }\n\n 50% {\n opacity: 1;\n }\n\n 100% {\n opacity: .3;\n }\n}\n\n.emotion-0 {\n font-weight: bold;\n color: red;\n -webkit-animation: animation-0 2s infinite;\n animation: animation-0 2s infinite;\n}\n\n\n Cheesecake - Quantity: 2\n\n`;\n"
},
{
"path": "chapter8/4_component_stories/1_stories/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter8/4_component_stories/1_stories/constants.js",
"content": "export const API_ADDR = \"http://localhost:3000\";\n"
},
{
"path": "chapter8/4_component_stories/1_stories/index.html",
"content": "\n\n \n Inventory \n
\n \n \n\n"
},
{
"path": "chapter8/4_component_stories/1_stories/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupJestEmotion.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/4_component_stories/1_stories/package.json",
"content": "{\n \"name\": \"1_component_stories\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"storybook\": \"start-storybook\",\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@storybook/addon-actions\": \"^6.0.28\",\n \"@storybook/addon-knobs\": \"^6.0.28\",\n \"@storybook/react\": \"^6.0.28\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babel-loader\": \"^8.1.0\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"fetch-mock\": \"^9.10.3\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"jest-emotion\": \"^10.0.32\",\n \"nock\": \"^12.0.3\"\n },\n \"dependencies\": {\n \"@emotion/core\": \"^10.0.28\",\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/4_component_stories/1_stories/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/4_component_stories/1_stories/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/4_component_stories/1_stories/setupJestEmotion.js",
"content": "const { matchers } = require(\"jest-emotion\");\n\nexpect.extend(matchers);\n"
},
{
"path": "chapter8/4_component_stories/1_stories/styles.css",
"content": ".almost-out-of-stock {\n font-weight: bold;\n color: red;\n}\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/.storybook/main.js",
"content": "module.exports = {\n stories: [\"../**/*.stories.@(jsx|mdx)\"],\n addons: [\n \"@storybook/addon-knobs/register\",\n \"@storybook/addon-actions/register\",\n {\n name: \"@storybook/addon-docs\",\n options: { configureJSX: true }\n }\n ],\n webpackFinal: async config => {\n return {\n ...config,\n resolve: {\n ...config.resolve,\n alias: {\n \"core-js/modules\": \"@storybook/core/node_modules/core-js/modules\",\n \"core-js/features\": \"@storybook/core/node_modules/core-js/features\"\n }\n }\n };\n }\n};\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/ActionLog.jsx",
"content": "import React from \"react\";\n\nexport const ActionLog = ({ actions }) => {\n return (\n \n
Action Log \n
\n {actions.map(({ time, message, data }, i) => {\n const date = new Date(time).toUTCString();\n return (\n \n Date: {date} - Message: {message} - Data: {JSON.stringify(data)}\n \n );\n })}\n \n
\n
Inventory Contents \n
\n
\n
\n
\n itemName}\n from={{ fontSize: 0, opacity: 0 }}\n enter={{ fontSize: 18, opacity: 1 }}\n leave={{ fontSize: 0, opacity: 0 }}\n >\n {([itemName, quantity]) => styleProps => (\n \n {generateItemText(itemName, quantity)}\n \n )}\n \n \n );\n};\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/ItemList.stories.jsx",
"content": "import React from \"react\";\nimport { withKnobs, object } from \"@storybook/addon-knobs\";\nimport { ItemList } from \"./ItemList\";\n\nexport default {\n title: \"ItemList\",\n component: ItemList,\n includeStories: [\"staticItemList\", \"animatedItems\"],\n decorators: [withKnobs]\n};\n\nexport const staticItemList = () => (\n \n \n \n \n"
},
{
"path": "chapter8/4_component_stories/2_documentation/ItemList.test.jsx",
"content": "import React from \"react\";\nimport { ItemList, generateItemText } from \"./ItemList.jsx\";\nimport { render } from \"@testing-library/react\";\n\njest.mock(\"react-spring/renderprops\");\n\ndescribe(\"generateItemText\", () => {\n test(\"generating an item's text\", () => {\n expect(generateItemText(\"cheesecake\", 3)).toBe(\"Cheesecake - Quantity: 3\");\n expect(generateItemText(\"apple pie\", 22)).toBe(\"Apple pie - Quantity: 22\");\n });\n});\n\ndescribe(\"ItemList Component\", () => {\n test(\"list items\", () => {\n const itemList = { cheesecake: 2, croissant: 5, macaroon: 96 };\n const { getByText } = render(\n
\n \n Action Log\n \n \n \n Date: \n Fri, 02 Jan 1970 00:00:00 GMT\n - Message: \n Loaded item list\n - Data: \n {\"cheesecake\":2,\"macaroon\":5}\n \n \n Date: \n Sat, 03 Jan 1970 00:00:00 GMT\n - Message: \n Item added\n - Data: \n {\"cheesecake\":2}\n \n \n Date: \n Sun, 04 Jan 1970 00:00:00 GMT\n - Message: \n Item removed\n - Data: \n {\"cheesecake\":1}\n \n \n Date: \n Mon, 05 Jan 1970 00:00:00 GMT\n - Message: \n Something weird happened\n - Data: \n {\"error\":\"The cheesecake is a lie\"}\n \n \n \n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n Date: \n Sun, 21 Jun 2020 13:37:00 GMT\n - Message: \n Item added\n - Data: \n {\"itemAdded\":\"cheesecake\",\"addedQuantity\":6}\n \n \n\n`;\n\nexports[`updating the action log when loading items 1`] = `\n\n \n Action Log\n \n \n \n Date: \n Sat, 20 Jun 2020 13:37:00 GMT\n - Message: \n Loaded items from the server\n - Data: \n {\"status\":200,\"body\":{\"cheesecake\":2,\"croissant\":5,\"macaroon\":96}}\n \n \n\n`;\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/__snapshots__/ItemList.test.jsx.snap",
"content": "// Jest Snapshot v1, https://goo.gl/fbAQLP\n\nexports[`ItemList Component highlighting items that are almost out of stock 1`] = `\n@keyframes animation-0 {\n 0% {\n opacity: .3;\n }\n\n 50% {\n opacity: 1;\n }\n\n 100% {\n opacity: .3;\n }\n}\n\n.emotion-0 {\n font-weight: bold;\n color: red;\n -webkit-animation: animation-0 2s infinite;\n animation: animation-0 2s infinite;\n}\n\n\n Cheesecake - Quantity: 2\n\n`;\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/babel.config.js",
"content": "module.exports = {\n presets: [\n [\n \"@babel/preset-env\",\n {\n targets: {\n node: \"current\"\n }\n }\n ],\n \"@babel/preset-react\"\n ]\n};\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/constants.js",
"content": "export const API_ADDR = \"http://localhost:3000\";\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/index.html",
"content": "\n\n \n Inventory \n
\n \n \n\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/index.jsx",
"content": "import ReactDOM from \"react-dom\";\nimport React from \"react\";\nimport { App } from \"./App.jsx\";\n\nReactDOM.render(/setupJestDom.js\",\n \"/setupJestEmotion.js\",\n \"/setupGlobalFetch.js\"\n ]\n};\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/package.json",
"content": "{\n \"name\": \"1_component_stories\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"storybook\": \"start-storybook\",\n \"build\": \"browserify index.jsx -p esmify -o bundle.js\",\n \"start\": \"http-server ./\",\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"@babel/core\": \"^7.9.6\",\n \"@babel/preset-env\": \"^7.9.6\",\n \"@babel/preset-react\": \"^7.9.4\",\n \"@storybook/addon-actions\": \"^6.0.28\",\n \"@storybook/addon-docs\": \"^5.3.19\",\n \"@storybook/addon-knobs\": \"^6.0.28\",\n \"@storybook/react\": \"^6.0.28\",\n \"@testing-library/dom\": \"^7.10.1\",\n \"@testing-library/jest-dom\": \"^5.9.0\",\n \"@testing-library/react\": \"^10.2.1\",\n \"babel-loader\": \"^8.1.0\",\n \"babelify\": \"^10.0.0\",\n \"browserify\": \"^16.5.1\",\n \"core-js\": \"^2.6.11\",\n \"esmify\": \"^2.1.1\",\n \"fetch-mock\": \"^9.10.3\",\n \"http-server\": \"^0.12.3\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"jest\": \"^25.5\",\n \"jest-emotion\": \"^10.0.32\",\n \"nock\": \"^12.0.3\",\n \"react-is\": \"^16.13.1\"\n },\n \"dependencies\": {\n \"@emotion/core\": \"^10.0.28\",\n \"prop-types\": \"^15.7.2\",\n \"react\": \"^16.13.1\",\n \"react-dom\": \"^16.13.1\",\n \"react-spring\": \"^8.0.27\"\n },\n \"browserify\": {\n \"transform\": [\n [\n \"babelify\",\n {\n \"presets\": [\n [\n \"@babel/preset-env\",\n {\n \"useBuiltIns\": \"usage\",\n \"corejs\": 2\n }\n ],\n \"@babel/preset-react\"\n ]\n }\n ]\n ]\n }\n}\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/setupGlobalFetch.js",
"content": "const fetch = require(\"isomorphic-fetch\");\n\nglobal.window.fetch = fetch;\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/setupJestDom.js",
"content": "const jestDom = require(\"@testing-library/jest-dom\");\n\nexpect.extend(jestDom);\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/setupJestEmotion.js",
"content": "const { matchers } = require(\"jest-emotion\");\n\nexpect.extend(matchers);\n"
},
{
"path": "chapter8/4_component_stories/2_documentation/styles.css",
"content": ".almost-out-of-stock {\n font-weight: bold;\n color: red;\n}\n"
},
{
"path": "chapter8/server/README.md",
"content": "# Chapter 5 Server\n\nTo better support the client-side application we'll build on Chapter 5, I've had to do a few updates to the server from Chapter 4.\n\nIn case you want to update the back-end from Chapter 4 yourself, here's the list of changes I've done:\n\n- For the server to accept the requests coming from the client, you'll need to use [`@koa/cors`](https://github.com/koajs/cors)\n- To enable running tests while the server is running, I bind it to different ports depending on whether I am in a test or development environment.\n- At `POST /inventory/:itemName` I have added a route which adds an item to the inventory. It takes a `body` containing the `quantity` to add.\n- At `GET /inventory` I have added a route which lists all items in the inventory.\n- At `DELETE /inventory/:itemName` I have added a route which let's you delete inventory items so that you can use to fix the `undo` functionality\n- I've used `koa-socket-2` to add support for `socket.io`\n- The `POST /inventory/:itemName` will now push updates to all clients but the one which added an item.\n"
},
{
"path": "chapter8/server/authenticationController.js",
"content": "const crypto = require(\"crypto\");\nconst { db } = require(\"./dbConnection\");\n\nconst hashPassword = password => {\n const hash = crypto.createHash(\"sha256\");\n hash.update(password);\n return hash.digest(\"hex\");\n};\n\nconst credentialsAreValid = async (username, password) => {\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) return false;\n return hashPassword(password) === user.passwordHash;\n};\n\nconst authenticationMiddleware = async (ctx, next) => {\n try {\n const authHeader = ctx.request.headers.authorization;\n const credentials = Buffer.from(\n authHeader.slice(\"basic\".length + 1),\n \"base64\"\n ).toString();\n const [username, password] = credentials.split(\":\");\n\n const validCredentialsSent = await credentialsAreValid(username, password);\n if (!validCredentialsSent) throw new Error(\"invalid credentials\");\n } catch (e) {\n ctx.status = 401;\n ctx.body = { message: \"please provide valid credentials\" };\n return;\n }\n\n await next();\n};\n\nmodule.exports = {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n};\n"
},
{
"path": "chapter8/server/authenticationController.test.js",
"content": "const crypto = require(\"crypto\");\nconst {\n hashPassword,\n credentialsAreValid,\n authenticationMiddleware\n} = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\n\ndescribe(\"hashPassword\", () => {\n test(\"hashing passwords\", () => {\n const plainTextPassword = \"password_example\";\n const hash = crypto.createHash(\"sha256\");\n hash.update(plainTextPassword);\n const expectedHash = hash.digest(\"hex\");\n expect(hashPassword(plainTextPassword)).toBe(expectedHash);\n });\n});\n\ndescribe(\"credentialsAreValid\", () => {\n test(\"validating credentials\", async () => {\n expect(await credentialsAreValid(globalUser.username, \"a_password\")).toBe(\n true\n );\n });\n});\n\ndescribe(\"authenticationMiddleware\", () => {\n test(\"returning an error if the credentials are not valid\", async () => {\n const fakeAuth = Buffer.from(\"invalid:credentials\").toString(\"base64\");\n const ctx = {\n request: {\n headers: { authorization: `Basic ${fakeAuth}` }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(0);\n expect(ctx).toEqual({\n ...ctx,\n status: 401,\n body: { message: \"please provide valid credentials\" }\n });\n });\n\n test(\"authenticating properly\", async () => {\n const ctx = {\n request: {\n headers: { authorization: globalUser.authHeader }\n }\n };\n\n const next = jest.fn();\n await authenticationMiddleware(ctx, next);\n expect(next.mock.calls).toHaveLength(1);\n });\n});\n"
},
{
"path": "chapter8/server/cartController.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { removeFromInventory } = require(\"./inventoryController\");\nconst logger = require(\"./logger\");\n\nconst addItemToCart = async (username, itemName) => {\n await removeFromInventory(itemName);\n\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n if (!user) {\n const userNotFound = new Error(\"user not found\");\n userNotFound.code = 404;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName })\n .first();\n\n if (itemEntry && itemEntry.quantity + 1 > 3) {\n const limitError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n limitError.code = 400;\n throw limitError;\n }\n\n if (itemEntry) {\n await db(\"carts_items\")\n .increment(\"quantity\")\n .update({ updatedAt: new Date().toISOString() })\n .where({\n userId: itemEntry.userId,\n itemName\n });\n } else {\n await db(\"carts_items\").insert({\n userId: user.id,\n itemName,\n quantity: 1,\n updatedAt: new Date().toISOString()\n });\n }\n\n logger.log(`${itemName} added to ${username}'s cart`);\n return db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n};\n\nconst hoursInMs = n => 1000 * 60 * 60 * n;\n\nconst removeStaleItems = async () => {\n const fourHoursAgo = new Date(Date.now() - hoursInMs(4)).toISOString();\n\n const staleItems = await db\n .select()\n .from(\"carts_items\")\n .where(\"updatedAt\", \"<\", fourHoursAgo);\n\n if (staleItems.length === 0) return;\n\n // Put stale items back in the inventory\n const inventoryUpdates = staleItems.map(staleItem =>\n db(\"inventory\")\n .increment(\"quantity\", staleItem.quantity)\n .where({ itemName: staleItem.itemName })\n );\n await Promise.all(inventoryUpdates);\n\n // Delete stale items from cart\n const staleItemTuples = staleItems.map(i => [i.itemName, i.userId]);\n await db(\"carts_items\")\n .del()\n .whereIn([\"itemName\", \"userId\"], staleItemTuples);\n};\n\nconst monitorStaleItems = () => setInterval(removeStaleItems, hoursInMs(2));\n\nmodule.exports = { addItemToCart, monitorStaleItems };\n"
},
{
"path": "chapter8/server/cartController.test.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { addItemToCart, monitorStaleItems } = require(\"./cartController\");\nconst { hashPassword } = require(\"./authenticationController\");\nconst { user: globalUser } = require(\"./userTestUtils\");\nconst FakeTimers = require(\"@sinonjs/fake-timers\");\n\nconst fs = require(\"fs\");\n\ndescribe(\"addItemToCart\", () => {\n beforeEach(() => {\n fs.writeFileSync(\"/tmp/logs.out\", \"\");\n });\n\n test(\"adding unavailable items to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 0 });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\"cheesecake is unavailable\");\n expectedError.code = 400;\n\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.*\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n expect.assertions(2);\n });\n\n test(\"adding items above limit to cart\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 3\n });\n\n try {\n await addItemToCart(globalUser.username, \"cheesecake\");\n } catch (e) {\n const expectedError = new Error(\n \"You can't have more than three units of an item in your cart\"\n );\n expectedError.code = 400;\n expect(e).toEqual(expectedError);\n }\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([{ itemName: \"cheesecake\", quantity: 3 }]);\n expect.assertions(2);\n });\n\n test(\"logging added items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n const logs = fs.readFileSync(\"/tmp/logs.out\", \"utf-8\");\n expect(logs).toContain(\n `cheesecake added to ${globalUser.username}'s cart\\n`\n );\n });\n});\n\nconst withRetries = async fn => {\n // Capture the assertion error since Jest does not export it\n const JestAssertionError = (() => {\n try {\n expect(false).toBe(true);\n } catch (e) {\n return e.constructor;\n }\n })();\n\n try {\n await fn();\n } catch (e) {\n if (e.constructor === JestAssertionError) {\n // Wait 100ms before retrying\n await new Promise(resolve => setTimeout(resolve, 100));\n await withRetries(fn);\n } else {\n throw e;\n }\n }\n};\n\ndescribe(\"timers\", () => {\n const hoursInMs = n => 1000 * 60 * 60 * n;\n\n let clock;\n beforeEach(() => {\n clock = FakeTimers.install({ toFake: [\"Date\", \"setInterval\"] });\n });\n\n afterEach(() => {\n clock = clock.uninstall();\n });\n\n test(\"removing stale items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 1 });\n await addItemToCart(globalUser.username, \"cheesecake\");\n\n clock.tick(hoursInMs(4));\n timer = monitorStaleItems();\n clock.tick(hoursInMs(2));\n\n await withRetries(async () => {\n const finalCartContent = await db\n .select()\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual([]);\n });\n\n await withRetries(async () => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\");\n\n expect(inventoryContent).toEqual([\n { itemName: \"cheesecake\", quantity: 1 }\n ]);\n });\n });\n});\n"
},
{
"path": "chapter8/server/dbConnection.js",
"content": "const environmentName = process.env.NODE_ENV;\nconst db = require(\"knex\")(require(\"./knexfile\")[environmentName]);\n\nconst closeConnection = () => db.destroy();\n\nmodule.exports = {\n db,\n closeConnection\n};\n"
},
{
"path": "chapter8/server/disconnectFromDb.js",
"content": "const { db } = require(\"./dbConnection\");\n\nafterAll(() => db.destroy());\n"
},
{
"path": "chapter8/server/inventoryController.js",
"content": "const { db } = require(\"./dbConnection\");\n\nconst removeFromInventory = async itemName => {\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n if (!inventoryEntry || inventoryEntry.quantity === 0) {\n const err = new Error(`${itemName} is unavailable`);\n err.code = 400;\n throw err;\n }\n\n await db(\"inventory\")\n .decrement(\"quantity\")\n .where({ itemName });\n};\n\nmodule.exports = { removeFromInventory };\n"
},
{
"path": "chapter8/server/jest.config.js",
"content": "module.exports = {\n testEnvironment: \"node\",\n globalSetup: \"./migrateDatabases.js\",\n setupFilesAfterEnv: [\n \"/truncateTables.js\",\n \"/seedUser.js\",\n \"/disconnectFromDb.js\"\n ]\n};\n"
},
{
"path": "chapter8/server/knexfile.js",
"content": "module.exports = {\n test: {\n client: \"sqlite3\",\n connection: { filename: \"./test.sqlite\" },\n useNullAsDefault: true\n },\n development: {\n client: \"sqlite3\",\n connection: { filename: \"./dev.sqlite\" },\n useNullAsDefault: true\n }\n};\n"
},
{
"path": "chapter8/server/logger.js",
"content": "const fs = require(\"fs\");\n\nconst logger = {\n log: msg => fs.appendFileSync(\"/tmp/logs.out\", msg + \"\\n\")\n};\n\nmodule.exports = logger;\n"
},
{
"path": "chapter8/server/migrateDatabases.js",
"content": "const environmentName = process.env.NODE_ENV || \"test\";\nconst environmentConfig = require(\"./knexfile\")[environmentName];\nconst db = require(\"knex\")(environmentConfig);\n\nmodule.exports = async () => {\n // Migrate the database to the latest state\n await db.migrate.latest();\n\n // Close the connection to the database so that tests won't hang\n await db.destroy();\n};\n"
},
{
"path": "chapter8/server/migrations/20200325082401_initial_schema.js",
"content": "exports.up = async knex => {\n await knex.schema.createTable(\"users\", table => {\n table.increments(\"id\");\n table.string(\"username\");\n table.unique(\"username\");\n table.string(\"email\");\n table.string(\"passwordHash\");\n });\n\n await knex.schema.createTable(\"carts_items\", table => {\n table.integer(\"userId\").references(\"users.id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n\n await knex.schema.createTable(\"inventory\", table => {\n table.increments(\"id\");\n table.string(\"itemName\");\n table.unique(\"itemName\");\n table.integer(\"quantity\");\n });\n};\n\nexports.down = async knex => {\n await knex.schema.dropTable(\"users\");\n await knex.schema.dropTable(\"carts_items\");\n await knex.schema.dropTable(\"inventory\");\n};\n"
},
{
"path": "chapter8/server/migrations/20200331210311_updatedAt_field.js",
"content": "exports.up = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.timestamp(\"updatedAt\");\n });\n};\n\nexports.down = knex => {\n return knex.schema.alterTable(\"carts_items\", table => {\n table.dropColumn(\"updatedAt\");\n });\n};\n"
},
{
"path": "chapter8/server/package.json",
"content": "{\n \"name\": \"chapter5_server\",\n \"version\": \"1.0.0\",\n \"scripts\": {\n \"test\": \"jest --runInBand\",\n \"start\": \"cross-env NODE_ENV=development node server.js\",\n \"migrate:dev\": \"knex migrate:latest --env development\",\n \"seed:dev\": \"knex seed:run\"\n },\n \"devDependencies\": {\n \"@sinonjs/fake-timers\": \"github:sinonjs/fake-timers\",\n \"jest\": \"^24.9.0\",\n \"supertest\": \"^4.0.2\"\n },\n \"dependencies\": {\n \"@koa/cors\": \"^3.0.0\",\n \"cross-env\": \"^7.0.2\",\n \"isomorphic-fetch\": \"^2.2.1\",\n \"knex\": \"^0.20.13\",\n \"koa\": \"^2.11.0\",\n \"koa-body-parser\": \"^1.1.2\",\n \"koa-router\": \"^7.4.0\",\n \"koa-socket-2\": \"^1.2.0\",\n \"nock\": \"^12.0.3\",\n \"socket.io\": \"^2.3.0\",\n \"sqlite3\": \"^4.1.1\"\n },\n \"main\": \"alertController.spec.js\",\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"description\": \"\"\n}\n"
},
{
"path": "chapter8/server/seedUser.js",
"content": "const { createUser } = require(\"./userTestUtils\");\n\nbeforeEach(createUser);\n"
},
{
"path": "chapter8/server/seeds/initial_inventory.js",
"content": "exports.seed = async knex => {\n await knex(\"inventory\").del();\n return knex(\"inventory\").insert([\n { itemName: \"cheesecake\", quantity: 8 },\n { itemName: \"apple pie\", quantity: 2 },\n { itemName: \"carrot cake\", quantity: 5 }\n ]);\n};\n"
},
{
"path": "chapter8/server/server.js",
"content": "const fetch = require(\"isomorphic-fetch\");\nconst Koa = require(\"koa\");\nconst http = require(\"http\");\nconst IO = require(\"koa-socket-2\");\nconst cors = require(\"@koa/cors\");\nconst Router = require(\"koa-router\");\nconst bodyParser = require(\"koa-body-parser\");\n\nconst { db } = require(\"./dbConnection\");\n\nconst { addItemToCart } = require(\"./cartController\");\nconst {\n hashPassword,\n authenticationMiddleware\n} = require(\"./authenticationController\");\n\nconst PORT = process.env.NODE_ENV === \"test\" ? 5000 : 3000;\n\nconst app = new Koa();\nconst io = new IO();\nio.attach(app);\n\nconst router = new Router();\n\napp.use(cors());\n\napp.use(bodyParser());\n\napp.use(async (ctx, next) => {\n if (ctx.url.startsWith(\"/carts\")) {\n return await authenticationMiddleware(ctx, next);\n }\n\n await next();\n});\n\nrouter.put(\"/users/:username\", async ctx => {\n const { username } = ctx.params;\n const { email, password } = ctx.request.body;\n\n const userAlreadyExists = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (userAlreadyExists) {\n ctx.body = { message: `${username} already exists` };\n ctx.status = 409;\n return;\n }\n\n await db(\"users\").insert({\n username,\n email,\n passwordHash: hashPassword(password)\n });\n\n return (ctx.body = { message: `${username} created successfully` });\n});\n\nrouter.post(\"/carts/:username/items\", async ctx => {\n const { username } = ctx.params;\n const { item, quantity } = ctx.request.body;\n\n for (let i = 0; i < quantity; i++) {\n try {\n const newItems = await addItemToCart(username, item);\n ctx.body = newItems;\n } catch (e) {\n ctx.body = { message: e.message };\n ctx.status = e.code;\n return;\n }\n }\n});\n\nrouter.delete(\"/carts/:username/items/:item\", async ctx => {\n const { username, item } = ctx.params;\n const user = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n\n if (!user) {\n ctx.body = { message: \"user not found\" };\n ctx.status = 404;\n return;\n }\n\n const itemEntry = await db\n .select()\n .from(\"carts_items\")\n .where({ userId: user.id, itemName: item })\n .first();\n\n if (!itemEntry || itemEntry.quantity === 0) {\n ctx.body = { message: `${item} is not in the cart` };\n ctx.status = 400;\n return;\n }\n\n await db(\"carts_items\")\n .decrement(\"quantity\")\n .where({ userId: user.id, itemName: item });\n\n const inventoryEntry = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: item })\n .first();\n if (inventoryEntry) {\n await db(\"inventory\")\n .increment(\"quantity\")\n .where({ userId: itemEntry.userId, itemName: item });\n } else {\n await db(\"inventory\").insert({ itemName: item, quantity: 1 });\n }\n\n ctx.body = await db\n .select(\"itemName\", \"quantity\")\n .from(\"carts_items\")\n .where({ userId: user.id });\n});\n\nrouter.post(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n const clientId = ctx.request.headers[\"x-socket-client-id\"];\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const itemExists = current && current.quantity > 0;\n const newRecord = {\n itemName,\n quantity: (itemExists ? current.quantity : 0) + quantity\n };\n\n if (current) {\n await db(\"inventory\")\n .increment(\"quantity\", quantity)\n .where({ itemName });\n } else {\n await db(\"inventory\").insert(newRecord);\n }\n\n Object.entries(io.socket.sockets.connected).forEach(([id, socket]) => {\n if (id === clientId) return;\n socket.emit(\"add_item\", { itemName, quantity });\n });\n\n ctx.body = newRecord;\n});\n\nrouter.delete(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n const { quantity } = ctx.request.body;\n\n const current = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n const canDelete = current && current.quantity > quantity;\n\n if (canDelete) {\n await db(\"inventory\")\n .decrement(\"quantity\", quantity)\n .where({ itemName });\n ctx.body = { message: `Removed ${quantity} units of ${itemName}` };\n } else {\n ctx.status = 404;\n ctx.body = {\n message: `There aren't ${quantity} units of ${itemName} available.`\n };\n }\n});\n\nrouter.get(\"/inventory\", async ctx => {\n const inventoryContent = await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"quantity\", \">\", 0)\n .orderBy(\"quantity\", \"desc\");\n\n ctx.body = inventoryContent.reduce((acc, { itemName, quantity }) => {\n return { ...acc, [itemName]: quantity };\n }, {});\n});\n\nrouter.get(\"/inventory/:itemName\", async ctx => {\n const { itemName } = ctx.params;\n\n const response = await fetch(`http://recipepuppy.com/api?i=${itemName}`);\n const { title, href, results: recipes } = await response.json();\n const inventoryItem = await db\n .select()\n .from(\"inventory\")\n .where({ itemName })\n .first();\n\n ctx.body = {\n ...inventoryItem,\n info: `Data obtained from ${title} - ${href}`,\n recipes\n };\n});\n\napp.use(router.routes());\n\nmodule.exports = { app: app.listen(PORT, \"127.0.0.1\") };\n"
},
{
"path": "chapter8/server/server.test.js",
"content": "const { user: globalUser } = require(\"./userTestUtils\");\nconst { db } = require(\"./dbConnection\");\nconst request = require(\"supertest\");\nconst { app } = require(\"./server.js\");\nconst { hashPassword } = require(\"./authenticationController.js\");\nconst nock = require(\"nock\");\n\nafterAll(() => app.close());\n\ndescribe(\"add items to a cart\", () => {\n test(\"adding available items\", async () => {\n await db(\"inventory\").insert({ itemName: \"cheesecake\", quantity: 3 });\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const newItems = [{ itemName: \"cheesecake\", quantity: 3 }];\n expect(response.body).toEqual(newItems);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n\n expect(finalCartContent).toEqual(newItems);\n });\n\n test(\"adding unavailable items\", async () => {\n const response = await request(app)\n .post(`/carts/${globalUser.username}/items`)\n .set(\"authorization\", globalUser.authHeader)\n .send({ item: \"cheesecake\", quantity: 1 })\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is unavailable\"\n });\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual([]);\n });\n});\n\ndescribe(\"removing items from a cart\", () => {\n test(\"removing existing items\", async () => {\n await db(\"carts_items\").insert({\n userId: globalUser.id,\n itemName: \"cheesecake\",\n quantity: 1\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n const expectedFinalContent = [{ itemName: \"cheesecake\", quantity: 0 }];\n\n expect(response.body).toEqual(expectedFinalContent);\n\n const finalCartContent = await db\n .select(\"carts_items.itemName\", \"carts_items.quantity\")\n .from(\"carts_items\")\n .join(\"users\", \"users.id\", \"carts_items.userId\")\n .where(\"users.username\", globalUser.username);\n expect(finalCartContent).toEqual(expectedFinalContent);\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(1);\n });\n\n test(\"removing non-existing items\", async () => {\n await db(\"inventory\").insert({\n itemName: \"cheesecake\",\n quantity: 0\n });\n\n const response = await request(app)\n .del(`/carts/${globalUser.username}/items/cheesecake`)\n .set(\"authorization\", globalUser.authHeader)\n .expect(400)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"cheesecake is not in the cart\"\n });\n\n const { quantity: inventoryCheesecakes } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"cheesecake\" })\n .first();\n expect(inventoryCheesecakes).toEqual(0);\n });\n});\n\ndescribe(\"create accounts\", () => {\n test(\"creating a new account\", async () => {\n const response = await request(app)\n .put(\"/users/another_user\")\n .send({ email: \"another_user@example.org\", password: \"a_password\" })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: \"another_user created successfully\"\n });\n\n const savedUser = await db\n .select(\"email\", \"passwordHash\")\n .from(\"users\")\n .where({ username: \"another_user\" })\n .first();\n\n expect(savedUser).toEqual({\n email: \"another_user@example.org\",\n passwordHash: hashPassword(\"a_password\")\n });\n });\n\n test(\"creating a duplicate account\", async () => {\n const response = await request(app)\n .put(`/users/${globalUser.username}`)\n .send({ email: globalUser.email, password: \"a_password\" })\n .expect(409)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n message: `${globalUser.username} already exists`\n });\n });\n});\n\ndescribe(\"list inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n const carrotCake = { itemName: \"carrot cake\", quantity: 0 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie, carrotCake]);\n });\n\n test(\"fetching all available items\", async () => {\n const { body } = await request(app)\n .get(\"/inventory\")\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ eggs: 3, \"apple pie\": 1 });\n });\n});\n\ndescribe(\"add inventory items\", () => {\n test(\"adding a new item\", async () => {\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 3 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"adding an existing item\", async () => {\n const eggs = { itemName: \"eggs\", quantity: 2 };\n await db(\"inventory\").insert(eggs);\n\n const { body } = await request(app)\n .post(\"/inventory/eggs\")\n .send({ quantity: 3 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({ itemName: \"eggs\", quantity: 5 });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 5 });\n });\n});\n\ndescribe(\"remove inventory items\", () => {\n beforeEach(async () => {\n await db(\"inventory\").insert({ itemName: \"eggs\", quantity: 3 });\n });\n\n test(\"removing an item\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 2 })\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"Removed 2 units of eggs\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 1 });\n });\n\n test(\"removing more than the inventory quantity\", async () => {\n const { body } = await request(app)\n .del(\"/inventory/eggs\")\n .send({ quantity: 4 })\n .expect(404)\n .expect(\"Content-Type\", /json/);\n\n expect(body).toEqual({\n message: \"There aren't 4 units of eggs available.\"\n });\n\n expect(\n await db\n .select(\"itemName\", \"quantity\")\n .from(\"inventory\")\n .where(\"itemName\", \"eggs\")\n .first()\n ).toEqual({ itemName: \"eggs\", quantity: 3 });\n });\n});\n\ndescribe(\"fetch inventory items\", () => {\n const eggs = { itemName: \"eggs\", quantity: 3 };\n const applePie = { itemName: \"apple pie\", quantity: 1 };\n\n beforeEach(async () => {\n await db(\"inventory\").insert([eggs, applePie]);\n const { id: eggsId } = await db\n .select()\n .from(\"inventory\")\n .where({ itemName: \"eggs\" })\n .first();\n eggs.id = eggsId;\n });\n\n test(\"fetching an item from the inventory\", async () => {\n const eggsResponse = {\n title: \"FakeAPI\",\n href: \"example.org\",\n results: [{ name: \"Omelette du Fromage\" }]\n };\n\n nock(\"http://recipepuppy.com\")\n .get(\"/api\")\n .query({ i: \"eggs\" })\n .reply(200, eggsResponse);\n\n const response = await request(app)\n .get(`/inventory/eggs`)\n .expect(200)\n .expect(\"Content-Type\", /json/);\n\n expect(response.body).toEqual({\n ...eggs,\n info: `Data obtained from ${eggsResponse.title} - ${eggsResponse.href}`,\n recipes: eggsResponse.results\n });\n });\n});\n"
},
{
"path": "chapter8/server/truncateTables.js",
"content": "const { db } = require(\"./dbConnection\");\nconst tablesToTruncate = [\"users\", \"inventory\", \"carts_items\"];\n\nbeforeEach(() => {\n return Promise.all(tablesToTruncate.map(t => db(t).truncate()));\n});\n"
},
{
"path": "chapter8/server/userTestUtils.js",
"content": "const { db } = require(\"./dbConnection\");\nconst { hashPassword } = require(\"./authenticationController\");\n\nconst username = \"test_user\";\nconst password = \"a_password\";\nconst passwordHash = hashPassword(password);\nconst email = \"test_user@example.org\";\nconst validAuth = Buffer.from(`${username}:${password}`).toString(\"base64\");\nconst authHeader = `Basic ${validAuth}`;\n\nconst user = {\n username,\n password,\n email,\n authHeader\n};\n\nconst createUser = async () => {\n await db(\"users\").insert({ username, email, passwordHash });\n const { id } = await db\n .select()\n .from(\"users\")\n .where({ username })\n .first();\n user.id = id;\n};\n\nmodule.exports = { user, createUser };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/1_small_test/calculateCartPrice.js",
"content": "const calculateCartPrice = () => 7;\n\nmodule.exports = { calculateCartPrice };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/1_small_test/calculateCartPrice.test.js",
"content": "const { calculateCartPrice } = require(\"./calculateCartPrice\");\n\ntest(\"calculating total values\", () => {\n expect(calculateCartPrice([1, 1, 2, 3])).toBe(7);\n});\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/1_small_test/package.json",
"content": "{\n \"name\": \"1_small_test\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/2_partial_test/calculateCartPrice.js",
"content": "const calculateCartPrice = prices => {\n return prices.reduce((sum, price) => {\n return sum + price;\n }, 0);\n};\n\nmodule.exports = { calculateCartPrice };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/2_partial_test/calculateCartPrice.test.js",
"content": "const { calculateCartPrice } = require(\"./calculateCartPrice\");\n\ntest(\"calculating total values\", () => {\n expect(calculateCartPrice([1, 1, 2, 3])).toBe(7);\n expect(calculateCartPrice([3, 5, 8])).toBe(16);\n expect(calculateCartPrice([13, 21])).toBe(34);\n expect(calculateCartPrice([55])).toBe(55);\n});\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/2_partial_test/package.json",
"content": "{\n \"name\": \"2_partial_test\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/3_extra_test/calculateCartPrice.js",
"content": "const calculateCartPrice = (prices, discountPercentage) => {\n const total = prices.reduce((sum, price) => {\n return sum + price;\n }, 0);\n\n return discountPercentage\n ? ((100 - discountPercentage) / 100) * total\n : total;\n};\n\nmodule.exports = { calculateCartPrice };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/3_extra_test/calculateCartPrice.test.js",
"content": "const { calculateCartPrice } = require(\"./calculateCartPrice\");\n\ntest(\"calculating total values\", () => {\n expect(calculateCartPrice([1, 1, 2, 3])).toBe(7);\n expect(calculateCartPrice([3, 5, 8])).toBe(16);\n expect(calculateCartPrice([13, 21])).toBe(34);\n expect(calculateCartPrice([55])).toBe(55);\n});\n\ntest(\"applying a discount\", () => {\n expect(calculateCartPrice([1, 2, 3], 50)).toBe(3);\n expect(calculateCartPrice([2, 5, 5], 25)).toBe(9);\n expect(calculateCartPrice([9, 21], 10)).toBe(27);\n expect(calculateCartPrice([50, 50], 100)).toBe(0);\n});\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/3_extra_test/package.json",
"content": "{\n \"name\": \"3_extra_test\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/4_handling_edge_cases/calculateCartPrice.js",
"content": "const calculateCartPrice = (prices, discountPercentage) => {\n const total = prices.reduce((sum, price) => {\n return sum + price;\n }, 0);\n\n return typeof discountPercentage === \"number\" && !isNaN(discountPercentage)\n ? ((100 - discountPercentage) / 100) * total\n : total;\n};\n\nmodule.exports = { calculateCartPrice };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/4_handling_edge_cases/calculateCartPrice.test.js",
"content": "const { calculateCartPrice } = require(\"./calculateCartPrice\");\n\ntest(\"calculating total values\", () => {\n expect(calculateCartPrice([1, 1, 2, 3])).toBe(7);\n expect(calculateCartPrice([3, 5, 8])).toBe(16);\n expect(calculateCartPrice([13, 21])).toBe(34);\n expect(calculateCartPrice([55])).toBe(55);\n});\n\ntest(\"applying a discount\", () => {\n expect(calculateCartPrice([1, 2, 3], 50)).toBe(3);\n expect(calculateCartPrice([2, 5, 5], 25)).toBe(9);\n expect(calculateCartPrice([9, 21], 10)).toBe(27);\n expect(calculateCartPrice([50, 50], 100)).toBe(0);\n});\n\ntest(\"handling strings\", () => {\n expect(calculateCartPrice([1, 2, 3], \"string\")).toBe(6);\n});\n\ntest(\"handling NaN\", () => {\n expect(calculateCartPrice([1, 2, 3], NaN)).toBe(6);\n});\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/1_what_tdd_is/4_handling_edge_cases/package.json",
"content": "{\n \"name\": \"4_handling_edge_cases\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/2_adjusting_iteration_size/1_bigger_steps/calculateCartPrice.js",
"content": "const calculateCartPrice = (prices, discountPercentage) => {\n const total = prices.reduce((sum, price) => {\n return sum + price;\n }, 0);\n\n return discountPercentage\n ? ((100 - discountPercentage) / 100) * total\n : total;\n};\n\nmodule.exports = { calculateCartPrice };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/2_adjusting_iteration_size/1_bigger_steps/calculateCartPrice.test.js",
"content": "const { calculateCartPrice } = require(\"./calculateCartPrice\");\n\ntest(\"calculating total values\", () => {\n expect(calculateCartPrice([1, 1, 2, 3])).toBe(7);\n expect(calculateCartPrice([3, 5, 8])).toBe(16);\n expect(calculateCartPrice([13, 21])).toBe(34);\n expect(calculateCartPrice([55])).toBe(55);\n});\n\ntest(\"applying a discount\", () => {\n expect(calculateCartPrice([1, 2, 3], 50)).toBe(3);\n expect(calculateCartPrice([2, 5, 5], 25)).toBe(9);\n expect(calculateCartPrice([9, 21], 10)).toBe(27);\n expect(calculateCartPrice([50, 50], 100)).toBe(0);\n});\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/2_adjusting_iteration_size/1_bigger_steps/package.json",
"content": "{\n \"name\": \"2_adjusting_iteration_size\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/2_adjusting_iteration_size/1_bigger_steps/pickMostExpensive.js",
"content": "const { calculateCartPrice } = require(\"./calculateCartPrice\");\n\nconst pickMostExpensive = carts => {\n let mostExpensivePrice = 0;\n let mostExpensiveCart = null;\n\n for (let i = 0; i < carts.length; i++) {\n const currentCart = carts[i];\n const currentCartPrice = calculateCartPrice(currentCart);\n if (currentCartPrice >= mostExpensivePrice) {\n mostExpensivePrice = currentCartPrice;\n mostExpensiveCart = currentCart;\n }\n }\n\n return mostExpensiveCart;\n};\n\nmodule.exports = { pickMostExpensive };\n"
},
{
"path": "chapter9/1_the_philosophy_behind_tdd/2_adjusting_iteration_size/1_bigger_steps/pickMostExpensive.test.js",
"content": "const { pickMostExpensive } = require(\"./pickMostExpensive\");\n\ntest(\"picking the most expensive cart\", () => {\n expect(pickMostExpensive([[3, 2, 1, 4], [5], [50]])).toEqual([50]);\n expect(pickMostExpensive([[2, 8, 9], [0], [20]])).toEqual([20]);\n expect(pickMostExpensive([[0], [0], [0]])).toEqual([0]);\n expect(pickMostExpensive([[], [5], []])).toEqual([5]);\n});\n\ntest(\"null for an empty cart array\", () => {\n expect(pickMostExpensive([])).toEqual(null);\n});\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/1_generating_item_rows/inventoryReport.js",
"content": "const generateItemRow = ({ name, quantity, price }) => {\n if (quantity === 0 || price === 0) return null;\n return `${name},${quantity},${price},${price * quantity}`;\n};\n\nmodule.exports = { generateItemRow };\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/1_generating_item_rows/inventoryReport.test.js",
"content": "const { generateItemRow } = require(\"./inventoryReport\");\n\ntest(\"generating an item's row\", () => {\n expect(generateItemRow({ name: \"macaroon\", quantity: 12, price: 3 })).toBe(\n \"macaroon,12,3,36\"\n );\n expect(generateItemRow({ name: \"cheesecake\", quantity: 6, price: 12 })).toBe(\n \"cheesecake,6,12,72\"\n );\n expect(generateItemRow({ name: \"apple pie\", quantity: 5, price: 15 })).toBe(\n \"apple pie,5,15,75\"\n );\n});\n\ntest(\"ommitting soldout items\", () => {\n expect(generateItemRow({ name: \"macaroon\", quantity: 0, price: 3 })).toBe(\n null\n );\n expect(generateItemRow({ name: \"cheesecake\", quantity: 0, price: 12 })).toBe(\n null\n );\n});\n\ntest(\"ommitting free items\", () => {\n expect(\n generateItemRow({ name: \"plastic cups\", quantity: 99, price: 0 })\n ).toBe(null);\n expect(generateItemRow({ name: \"napkins\", quantity: 200, price: 0 })).toBe(\n null\n );\n});\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/1_generating_item_rows/package.json",
"content": "{\n \"name\": \"1_generating_item_rows\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/2_generating_total_row/inventoryReport.js",
"content": "const generateItemRow = ({ name, quantity, price }) => {\n if (quantity === 0 || price === 0) return null;\n return `${name},${quantity},${price},${price * quantity}`;\n};\n\nconst generateTotalRow = items => {\n const total = items.reduce(\n (t, { price, quantity }) => t + price * quantity,\n 0\n );\n return `Total,,,${total}`;\n};\n\nmodule.exports = { generateItemRow, generateTotalRow };\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/2_generating_total_row/inventoryReport.test.js",
"content": "const { generateItemRow, generateTotalRow } = require(\"./inventoryReport\");\n\ndescribe(\"generateItemRow\", () => {\n test(\"generating an item's row\", () => {\n expect(generateItemRow({ name: \"macaroon\", quantity: 12, price: 3 })).toBe(\n \"macaroon,12,3,36\"\n );\n expect(\n generateItemRow({ name: \"cheesecake\", quantity: 6, price: 12 })\n ).toBe(\"cheesecake,6,12,72\");\n expect(generateItemRow({ name: \"apple pie\", quantity: 5, price: 15 })).toBe(\n \"apple pie,5,15,75\"\n );\n });\n\n test(\"ommitting soldout items\", () => {\n expect(generateItemRow({ name: \"macaroon\", quantity: 0, price: 3 })).toBe(\n null\n );\n expect(\n generateItemRow({ name: \"cheesecake\", quantity: 0, price: 12 })\n ).toBe(null);\n });\n\n test(\"ommitting free items\", () => {\n expect(\n generateItemRow({ name: \"plastic cups\", quantity: 99, price: 0 })\n ).toBe(null);\n expect(generateItemRow({ name: \"napkins\", quantity: 200, price: 0 })).toBe(\n null\n );\n });\n});\n\ndescribe(\"generateTotalRow\", () => {\n test(\"generating a total row\", () => {\n const items = [\n { name: \"apple pie\", quantity: 3, price: 15 },\n { name: \"plastic cups\", quantity: 0, price: 55 },\n { name: \"macaroon\", quantity: 12, price: 3 },\n { name: \"cheesecake\", quantity: 0, price: 12 }\n ];\n\n expect(generateTotalRow(items)).toBe(\"Total,,,81\");\n expect(generateTotalRow(items.slice(1))).toBe(\"Total,,,36\");\n expect(generateTotalRow(items.slice(3))).toBe(\"Total,,,0\");\n });\n});\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/2_generating_total_row/package.json",
"content": "{\n \"name\": \"2_generating_total_row\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/3_creating_report/inventoryReport.js",
"content": "const fs = require(\"fs\");\n\nconst generateItemRow = ({ name, quantity, price }) => {\n if (quantity === 0 || price === 0) return null;\n return `${name},${quantity},${price},${price * quantity}`;\n};\n\nconst generateTotalRow = items => {\n const total = items.reduce(\n (t, { price, quantity }) => t + price * quantity,\n 0\n );\n return `Total,,,${total}`;\n};\n\nconst createInventoryValuesReport = items => {\n const itemRows = items.map(generateItemRow).join(\"\\n\");\n const totalRow = generateTotalRow(items);\n const reportContents = itemRows + \"\\n\" + totalRow;\n fs.writeFileSync(\"/tmp/inventoryValues.csv\", reportContents);\n};\n\nmodule.exports = {\n generateItemRow,\n generateTotalRow,\n createInventoryValuesReport\n};\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/3_creating_report/inventoryReport.test.js",
"content": "const fs = require(\"fs\");\nconst {\n generateItemRow,\n generateTotalRow,\n createInventoryValuesReport\n} = require(\"./inventoryReport\");\n\ndescribe(\"generateItemRow\", () => {\n test(\"generating an item's row\", () => {\n expect(generateItemRow({ name: \"macaroon\", quantity: 12, price: 3 })).toBe(\n \"macaroon,12,3,36\"\n );\n expect(\n generateItemRow({ name: \"cheesecake\", quantity: 6, price: 12 })\n ).toBe(\"cheesecake,6,12,72\");\n expect(generateItemRow({ name: \"apple pie\", quantity: 5, price: 15 })).toBe(\n \"apple pie,5,15,75\"\n );\n });\n\n test(\"ommitting soldout items\", () => {\n expect(generateItemRow({ name: \"macaroon\", quantity: 0, price: 3 })).toBe(\n null\n );\n expect(\n generateItemRow({ name: \"cheesecake\", quantity: 0, price: 12 })\n ).toBe(null);\n });\n\n test(\"ommitting free items\", () => {\n expect(\n generateItemRow({ name: \"plastic cups\", quantity: 99, price: 0 })\n ).toBe(null);\n expect(generateItemRow({ name: \"napkins\", quantity: 200, price: 0 })).toBe(\n null\n );\n });\n});\n\ndescribe(\"generateTotalRow\", () => {\n test(\"generating a total row\", () => {\n const items = [\n { name: \"apple pie\", quantity: 3, price: 15 },\n { name: \"plastic cups\", quantity: 0, price: 55 },\n { name: \"macaroon\", quantity: 12, price: 3 },\n { name: \"cheesecake\", quantity: 0, price: 12 }\n ];\n\n expect(generateTotalRow(items)).toBe(\"Total,,,81\");\n expect(generateTotalRow(items.slice(1))).toBe(\"Total,,,36\");\n expect(generateTotalRow(items.slice(3))).toBe(\"Total,,,0\");\n });\n});\n\ndescribe(\"createInventoryValuesReport\", () => {\n test(\"creating reports\", () => {\n const items = [\n { name: \"apple pie\", quantity: 3, price: 15 },\n { name: \"cheesecake\", quantity: 2, price: 12 },\n { name: \"macaroon\", quantity: 20, price: 3 }\n ];\n\n createInventoryValuesReport(items);\n expect(fs.readFileSync(\"/tmp/inventoryValues.csv\", \"utf8\")).toBe(\n \"apple pie,3,15,45\\ncheesecake,2,12,24\\nmacaroon,20,3,60\\nTotal,,,129\"\n );\n\n createInventoryValuesReport(items.slice(1));\n expect(fs.readFileSync(\"/tmp/inventoryValues.csv\", \"utf8\")).toBe(\n \"cheesecake,2,12,24\\nmacaroon,20,3,60\\nTotal,,,84\"\n );\n\n createInventoryValuesReport(items.slice(2));\n expect(fs.readFileSync(\"/tmp/inventoryValues.csv\", \"utf8\")).toBe(\n \"macaroon,20,3,60\\nTotal,,,60\"\n );\n });\n});\n"
},
{
"path": "chapter9/2_writing_a_js_module_using_tdd/3_creating_report/package.json",
"content": "{\n \"name\": \"3_creating_report\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"test\": \"jest\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"devDependencies\": {\n \"jest\": \"^26.1.0\"\n }\n}\n"
},
{
"path": "package.json",
"content": "{\n \"name\": \"testing-javascript-applications\",\n \"version\": \"1.0.0\",\n \"description\": \"\",\n \"main\": \"index.js\",\n \"scripts\": {\n \"lint:fix\": \"prettier --write .\",\n \"test\": \"echo \\\"Error: no test specified\\\" && exit 1\"\n },\n \"repository\": {\n \"type\": \"git\",\n \"url\": \"git+https://github.com/lucasfcosta/testing-javascript-applications.git\"\n },\n \"keywords\": [],\n \"author\": \"\",\n \"license\": \"ISC\",\n \"bugs\": {\n \"url\": \"https://github.com/lucasfcosta/testing-javascript-applications/issues\"\n },\n \"homepage\": \"https://github.com/lucasfcosta/testing-javascript-applications#readme\",\n \"devDependencies\": {\n \"husky\": \"^3.1.0\",\n \"prettier\": \"^1.19.1\",\n \"pretty-quick\": \"^2.0.1\"\n },\n \"husky\": {\n \"hooks\": {\n \"pre-commit\": \"pretty-quick --staged\"\n }\n }\n}\n"
}
]