[ { "path": ".classpath", "content": "\r\n\r\n\t\r\n\t\r\n\t\r\n\t\r\n\t\r\n\t\r\n\t\r\n\t\r\n\r\n" }, { "path": ".idea/copyright/Apache.xml", "content": "\n \n \n" }, { "path": ".idea/copyright/profiles_settings.xml", "content": "\n \n \n \n \n \n" }, { "path": ".idea/libraries/lib.xml", "content": "\n \n \n \n \n \n \n \n \n \n \n \n" }, { "path": ".idea/misc.xml", "content": "\n\n \n \n \n \n\n\n" }, { "path": ".idea/modules.xml", "content": "\n\n \n \n \n \n \n\n\n" }, { "path": ".idea/runConfigurations/All_in_GSCollectionsKata.xml", "content": "\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n" }, { "path": ".project", "content": "\r\n\r\n\tGS Collections Kata\r\n\t\r\n\t\r\n\t\r\n\t\r\n\t\t\r\n\t\t\torg.eclipse.jdt.core.javabuilder\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n\t\r\n\t\torg.eclipse.jdt.core.javanature\r\n\t\r\n\r\n" }, { "path": ".settings/org.eclipse.jdt.core.prefs", "content": "#Fri Dec 23 13:01:22 EST 2011\r\neclipse.preferences.version=1\r\norg.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled\r\norg.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6\r\norg.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve\r\norg.eclipse.jdt.core.compiler.compliance=1.6\r\norg.eclipse.jdt.core.compiler.debug.lineNumber=generate\r\norg.eclipse.jdt.core.compiler.debug.localVariable=generate\r\norg.eclipse.jdt.core.compiler.debug.sourceFile=generate\r\norg.eclipse.jdt.core.compiler.problem.assertIdentifier=error\r\norg.eclipse.jdt.core.compiler.problem.enumIdentifier=error\r\norg.eclipse.jdt.core.compiler.source=1.6\r\n" }, { "path": "GSCollectionsKata.iml", "content": "\n\n \n \n \n \n \n \n \n \n \n \n \n \n\n\n" }, { "path": "LICENSE-2.0.txt", "content": "\n Apache License\n Version 2.0, January 2004\n http://www.apache.org/licenses/\n\n TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n 1. 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We also recommend that a\n file or class name and description of purpose be included on the\n same \"printed page\" as the copyright notice for easier\n identification within third-party archives.\n\n Copyright [yyyy] [name of copyright owner]\n\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n" }, { "path": "NOTICE", "content": "GS Collections Kata\nCopyright 2011 Goldman Sachs\n\nThis product includes software (JUnit) developed by\nJUnit.org (http://www.junit.org/).\n" }, { "path": "README.md", "content": "# GS Collections Kata\r\n\r\n## What is a Code Kata?\r\nA _kata_ is an exercise in martial arts. A code kata is an exercise in programming which helps hone your skills through practice and repetition. You can find out more about code Katas in general [here](http://codekata.pragprog.com).\r\n\r\n## What is the GS Collections Code Kata?\r\nThe GS Collections Kata is a fun way to help you learn idiomatic GS Collections usage. This particular kata is set up as a series of unit tests which fail. Your task is to make them pass, using GS Collections. The Kata is meant to take approximately one eight-hour day.\r\n\r\nNew concepts are introduced in the [slides](http://www.goldmansachs.com/gs-collections/documents/GS Collections Training Session and Kata 5.0.0.pdf), with coding exercises at the end of each section. As you complete each exercise, you can check your answers against the [solutions branch](https://github.com/goldmansachs/gs-collections-kata/tree/solutions).\r\n\r\nMake sure you read the instructor notes in the slides. In addition, you can refer to the [GS Collections Reference Guide](http://www.goldmansachs.com/gs-collections/documents/GS Collections Reference Guide 5.0.0.pdf) for further detail and examples of the API.\r\n" }, { "path": "src/main/java/com/gs/collections/kata/Company.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.block.predicate.Predicate;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport org.junit.Assert;\n\n/**\n * A company has a {@link MutableList} of {@link Customer}s. It has an array of {@link Supplier}s, and a name.\n */\npublic class Company\n{\n private final String name;\n private final MutableList customers = FastList.newList();\n\n // suppliers are array based.\n private Supplier[] suppliers = new Supplier[0];\n\n public Company(String name)\n {\n this.name = name;\n }\n\n public String getName()\n {\n return this.name;\n }\n\n public void addCustomer(Customer aCustomer)\n {\n this.customers.add(aCustomer);\n }\n\n public MutableList getCustomers()\n {\n return this.customers;\n }\n\n public MutableList getOrders()\n {\n Assert.fail(\"Refactor this code to use GS Collections as part of Exercise 3\");\n MutableList orders = FastList.newList();\n for (Customer customer : this.customers)\n {\n orders.addAll(customer.getOrders());\n }\n return orders;\n }\n\n public Customer getMostRecentCustomer()\n {\n return this.customers.getLast();\n }\n\n public void addSupplier(Supplier supplier)\n {\n // need to replace the current array of suppliers with another, larger array\n // Of course, normally one would not use an array.\n\n final Supplier[] currentSuppliers = this.suppliers;\n this.suppliers = new Supplier[currentSuppliers.length + 1];\n System.arraycopy(currentSuppliers, 0, this.suppliers, 0, currentSuppliers.length);\n this.suppliers[this.suppliers.length - 1] = supplier;\n }\n\n public Supplier[] getSuppliers()\n {\n return this.suppliers;\n }\n\n public Customer getCustomerNamed(String name)\n {\n /**\n * Use a {@link Predicate} to find a {@link Customer} with the name given.\n */\n Assert.fail(\"Implement this method as part of Exercise 2\");\n return null;\n }\n}\n" }, { "path": "src/main/java/com/gs/collections/kata/Customer.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport java.util.ArrayList;\nimport java.util.List;\n\nimport com.gs.collections.api.block.function.Function;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.block.function.AddFunction;\nimport com.gs.collections.impl.utility.ListIterate;\nimport org.junit.Assert;\n\n/**\n * Customers have a name, city and a list of {@link Order}s\n */\npublic class Customer\n{\n public static final Function TO_NAME = customer -> {\n Assert.fail(\"Replace with the implementation of the Function.\");\n return null;\n };\n\n public static final Function TO_CITY = null;\n\n public static final Function TO_TOTAL_ORDER_VALUE = Customer::getTotalOrderValue;\n\n private final String name;\n private final String city;\n\n private final List orders = new ArrayList<>();\n\n public Customer(String name, String city)\n {\n this.name = name;\n this.city = city;\n }\n\n public String getCity()\n {\n return this.city;\n }\n\n public String getName()\n {\n return this.name;\n }\n\n public List getOrders()\n {\n return this.orders;\n }\n\n public void addOrder(Order anOrder)\n {\n this.orders.add(anOrder);\n }\n\n public double getTotalOrderValue()\n {\n MutableList orderValues = ListIterate.collect(this.orders, Order::getValue);\n return orderValues.injectInto(0.0, AddFunction.DOUBLE_TO_DOUBLE);\n }\n}\n" }, { "path": "src/main/java/com/gs/collections/kata/LineItem.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.block.function.Function;\n\n/**\n * An Item has a name and a value.\n */\npublic class LineItem\n{\n public static final Function TO_NAME = LineItem::getName;\n\n private String name;\n private final double value;\n\n public String getName()\n {\n return this.name;\n }\n\n public void setName(String name)\n {\n this.name = name;\n }\n\n public double getValue()\n {\n return this.value;\n }\n\n public LineItem(String name, double value)\n {\n this.name = name;\n this.value = value;\n }\n\n @Override\n public String toString()\n {\n return this.name + \" $ \" + this.getValue();\n }\n}\n" }, { "path": "src/main/java/com/gs/collections/kata/Order.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport java.util.ArrayList;\nimport java.util.Collection;\nimport java.util.List;\n\nimport com.gs.collections.api.block.function.Function;\nimport com.gs.collections.impl.block.function.AddFunction;\nimport com.gs.collections.impl.collection.mutable.CollectionAdapter;\nimport com.gs.collections.impl.utility.Iterate;\n\n/**\n * Has a number, a {@link Customer}, a {@link List} of {@link LineItem}s, and a boolean that states whether or not the order\n * has been delivered. There is a class variable that contains the next order number.\n */\npublic class Order\n{\n public static final Function TO_VALUE = Order::getValue;\n\n public static final Function> TO_LINE_ITEMS = Order::getLineItems;\n\n private static int nextOrderNumber = 1;\n\n private final int orderNumber;\n private final List lineItems = new ArrayList<>();\n private boolean isDelivered;\n\n public Order()\n {\n this.orderNumber = nextOrderNumber;\n nextOrderNumber += 1;\n }\n\n public static void resetNextOrderNumber()\n {\n nextOrderNumber = 1;\n }\n\n public void deliver()\n {\n this.isDelivered = true;\n }\n\n public boolean isDelivered()\n {\n return this.isDelivered;\n }\n\n public void addLineItem(LineItem aLineItem)\n {\n this.lineItems.add(aLineItem);\n }\n\n public List getLineItems()\n {\n return this.lineItems;\n }\n\n @Override\n public String toString()\n {\n return \"order \" + this.orderNumber + \" items: \" + this.lineItems.size();\n }\n\n public double getValue()\n {\n Collection itemValues = Iterate.collect(this.lineItems, LineItem::getValue);\n\n return CollectionAdapter.adapt(itemValues).injectInto(0.0, AddFunction.DOUBLE_TO_DOUBLE);\n }\n}\n" }, { "path": "src/main/java/com/gs/collections/kata/Supplier.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.block.function.Function;\n\n/**\n * Suppliers have a name and an array of itemNames. Suppliers don't like lists - they prefer arrays....\n */\npublic class Supplier\n{\n public static final Function TO_NAME = Supplier::getName;\n\n public static final Function TO_NUMBER_OF_ITEMS = supplier -> supplier.getItemNames().length;\n\n private final String name;\n private final String[] itemNames;\n\n public Supplier(String name, String[] itemNames)\n {\n this.name = name;\n this.itemNames = itemNames;\n }\n\n public String getName()\n {\n return this.name;\n }\n\n public String[] getItemNames()\n {\n return this.itemNames;\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/CompanyDomainForKata.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport org.junit.Before;\n\npublic abstract class CompanyDomainForKata\n{\n protected final Company company = new Company(\"Bloggs Shed Supplies\");\n\n @Before\n public void setUp()\n {\n Order.resetNextOrderNumber();\n this.setUpCustomersAndOrders();\n this.setUpSuppliers();\n }\n\n private void setUpSuppliers()\n {\n this.company.addSupplier(new Supplier(\"Shedtastic\", new String[]{\"shed\", \"big shed\", \"huge shed\"}));\n this.company.addSupplier(new Supplier(\"Splendid Crocks\", new String[]{\"cup\", \"saucer\", \"bowl\"}));\n this.company.addSupplier(new Supplier(\"Annoying Pets\", new String[]{\"dog\", \"cat\", \"goldfish\"}));\n this.company.addSupplier(new Supplier(\"Gnomes 'R' Us\", new String[]{\"gnome\"}));\n this.company.addSupplier(new Supplier(\"Furniture Hamlet\", new String[]{\"table\", \"sofa\", \"chair\"}));\n this.company.addSupplier(new Supplier(\"SFD\", new String[]{\"sofa\", \"chair\"}));\n this.company.addSupplier(new Supplier(\"Doxins\", new String[]{\"kettle\", \"plasma screen\", \"sandwich toaster\"}));\n }\n\n private void setUpCustomersAndOrders()\n {\n Order fredOrder = new Order();\n fredOrder.addLineItem(new LineItem(\"shed\", 50.0));\n\n /**\n * TODO 7: Refactor Order and its API so this repetition is not necessary.\n */\n // TODO 7: Add 3 cups at 1.5 each to the order\n fredOrder.addLineItem(new LineItem(\"cup\", 1.5));\n fredOrder.addLineItem(new LineItem(\"cup\", 1.5));\n fredOrder.addLineItem(new LineItem(\"cup\", 1.5));\n\n // TODO 7: Add 3 saucers at 1.0 each to the order\n fredOrder.addLineItem(new LineItem(\"saucer\", 1.0));\n fredOrder.addLineItem(new LineItem(\"saucer\", 1.0));\n fredOrder.addLineItem(new LineItem(\"saucer\", 1.0));\n\n fredOrder.addLineItem(new LineItem(\"chair\", 12.50));\n fredOrder.addLineItem(new LineItem(\"table\", 1.0));\n\n Customer fred = new Customer(\"Fred\", \"London\");\n fred.addOrder(fredOrder);\n this.company.addCustomer(fred);\n\n Order maryOrder = new Order();\n maryOrder.addLineItem(new LineItem(\"cat\", 150.0));\n maryOrder.addLineItem(new LineItem(\"big shed\", 500.0));\n\n // TODO 7: Add 4 cups at 1.50 each to the order\n maryOrder.addLineItem(new LineItem(\"cup\", 1.5));\n maryOrder.addLineItem(new LineItem(\"cup\", 1.5));\n maryOrder.addLineItem(new LineItem(\"cup\", 1.5));\n maryOrder.addLineItem(new LineItem(\"cup\", 1.5));\n\n // TODO 7: Add 4 saucers at 1.50 each to the order\n maryOrder.addLineItem(new LineItem(\"saucer\", 1.5));\n maryOrder.addLineItem(new LineItem(\"saucer\", 1.5));\n maryOrder.addLineItem(new LineItem(\"saucer\", 1.5));\n maryOrder.addLineItem(new LineItem(\"saucer\", 1.5));\n\n maryOrder.addLineItem(new LineItem(\"sofa\", 120.0));\n maryOrder.addLineItem(new LineItem(\"dog\", 75.0));\n\n Customer mary = new Customer(\"Mary\", \"Liphook\");\n mary.addOrder(maryOrder);\n this.company.addCustomer(mary);\n\n Order billOrder1 = new Order();\n billOrder1.addLineItem(new LineItem(\"shed\", 50.0));\n\n // TODO 7: Add 43 gnomes at 7.50 each to the order\n for (int i = 0; i < 43; i++)\n {\n billOrder1.addLineItem(new LineItem(\"gnome\", 7.50));\n }\n\n Order billOrder2 = new Order();\n billOrder2.addLineItem(new LineItem(\"bowl\", 1.25));\n billOrder2.addLineItem(new LineItem(\"goldfish\", 0.50));\n\n Order billOrder3 = new Order();\n billOrder3.addLineItem(new LineItem(\"table\", 1.0));\n\n Customer bill = new Customer(\"Bill\", \"London\");\n bill.addOrder(billOrder1);\n bill.addOrder(billOrder2);\n bill.addOrder(billOrder3);\n\n this.company.addCustomer(bill);\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise1Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.block.function.Function;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport com.gs.collections.impl.test.Verify;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise1Test extends CompanyDomainForKata\n{\n @Test\n public void getCustomerNames()\n {\n Function nameFunction = Customer::getName;\n\n /**\n * Get the name of each of the company's customers.\n */\n MutableList customers = this.company.getCustomers();\n MutableList customerNames = null;\n\n MutableList expectedNames = FastList.newListWith(\"Fred\", \"Mary\", \"Bill\");\n Assert.assertEquals(expectedNames, customerNames);\n }\n\n @Test\n public void getCustomerCities()\n {\n /**\n * Get the city for each of the company's customers.\n */\n MutableList customers = this.company.getCustomers();\n MutableList customerCities = null;\n\n MutableList expectedCities = FastList.newListWith(\"London\", \"Liphook\", \"London\");\n Assert.assertEquals(expectedCities, customerCities);\n }\n\n @Test\n public void getLondonCustomers()\n {\n /**\n * Which customers come from London? Get a collection of those which do.\n */\n MutableList customers = this.company.getCustomers();\n MutableList customersFromLondon = null;\n Verify.assertSize(\"Should be 2 London customers\", 2, customersFromLondon);\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise2Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.block.predicate.Predicate;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.test.Verify;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise2Test extends CompanyDomainForKata\n{\n /**\n * Set up a {@link Predicate} that tests to see if a {@link Customer}'s city is \"London\"\n */\n private static final Predicate CUSTOMER_FROM_LONDON = null;\n\n @Test\n public void customerFromLondonPredicate()\n {\n String predicateClass = CUSTOMER_FROM_LONDON.getClass().getSimpleName();\n Assert.assertTrue(\n \"Solution should use Predicates.attributeEquals() or a lambda but used \" + predicateClass,\n \"AttributePredicate\".equals(predicateClass) || predicateClass.startsWith(\"Exercise2Test$$Lambda\"));\n\n Customer customerFromLondon = new Customer(\"test customer\", \"London\");\n\n Assert.assertEquals(\n \"Implement Customer.TO_CITY\",\n \"London\",\n Customer.TO_CITY.valueOf(customerFromLondon));\n\n Assert.assertTrue(\n \"CUSTOMER_FROM_LONDON should accept Customers where city is London\",\n CUSTOMER_FROM_LONDON.accept(customerFromLondon));\n }\n\n /**\n * Do any customers come from London? Use the Predicate {@link #CUSTOMER_FROM_LONDON}.\n */\n @Test\n public void doAnyCustomersLiveInLondon()\n {\n boolean anyCustomersFromLondon = false;\n Assert.assertTrue(anyCustomersFromLondon);\n }\n\n /**\n * Do all customers come from London? Use the Predicate {@link #CUSTOMER_FROM_LONDON}.\n */\n @Test\n public void doAllCustomersLiveInLondon()\n {\n boolean allCustomersFromLondon = true;\n Assert.assertFalse(allCustomersFromLondon);\n }\n\n /**\n * How many customers come from London? Use the Predicate {@link #CUSTOMER_FROM_LONDON}.\n */\n @Test\n public void howManyCustomersLiveInLondon()\n {\n int numberOfCustomerFromLondon = 0;\n Assert.assertEquals(\"Should be 2 London customers\", 2, numberOfCustomerFromLondon);\n }\n\n /**\n * Which customers come from London? Get a collection of those which do. Use the Predicate {@link\n * #CUSTOMER_FROM_LONDON}.\n */\n @Test\n public void getLondonCustomers()\n {\n MutableList customersFromLondon = null;\n Verify.assertSize(\"Should be 2 London customers\", 2, customersFromLondon);\n }\n\n /**\n * Which customers do not come from London? Get a collection of those which don't. Use the Predicate {@link\n * #CUSTOMER_FROM_LONDON}.\n */\n @Test\n public void getCustomersWhoDontLiveInLondon()\n {\n MutableList customersNotFromLondon = null;\n Verify.assertSize(\"customers not from London\", 1, customersNotFromLondon);\n }\n\n /**\n * Which customers come from London? Which customers do not come from London? Get a collection of each in a single pass.\n * Use the Predicate {@link #CUSTOMER_FROM_LONDON}.\n */\n @Test\n public void getCustomersWhoDoAndDoNotLiveInLondon()\n {\n MutableList customersFromLondon = null;\n MutableList customersNotFromLondon = null;\n Verify.assertSize(\"Should be 2 London customers\", 2, customersFromLondon);\n Verify.assertSize(\"customers not from London\", 1, customersNotFromLondon);\n }\n\n /**\n * Implement {@link Company#getCustomerNamed(String)} and get this test to pass.\n */\n @Test\n public void findMary()\n {\n Customer mary = this.company.getCustomerNamed(\"Mary\");\n Assert.assertEquals(\"customer's name should be Mary\", \"Mary\", mary.getName());\n }\n\n /**\n * Implement {@link Company#getCustomerNamed(String)} and get this test to pass.\n */\n @Test\n public void findPete()\n {\n Customer pete = this.company.getCustomerNamed(\"Pete\");\n Assert.assertNull(\n \"Should be null as there is no customer called Pete\",\n pete);\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise3Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.api.set.MutableSet;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport com.gs.collections.impl.set.mutable.UnifiedSet;\nimport com.gs.collections.impl.test.Verify;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise3Test extends CompanyDomainForKata\n{\n /**\n * Improve {@link Company#getOrders()} without breaking this test.\n */\n @Test\n public void improveGetOrders()\n {\n // Delete this line - it's a reminder\n Assert.fail(\"Improve getOrders() without breaking this test\");\n Verify.assertSize(5, this.company.getOrders());\n }\n\n /**\n * Get all items that have been ordered by anybody.\n */\n @Test\n public void findItemNames()\n {\n MutableList allOrderedLineItems = null;\n MutableSet actualItemNames = null;\n\n Verify.assertInstanceOf(MutableSet.class, actualItemNames);\n Verify.assertInstanceOf(String.class, actualItemNames.getFirst());\n\n MutableSet expectedItemNames = UnifiedSet.newSetWith(\n \"shed\", \"big shed\", \"bowl\", \"cat\", \"cup\", \"chair\", \"dog\",\n \"goldfish\", \"gnome\", \"saucer\", \"sofa\", \"table\");\n Assert.assertEquals(expectedItemNames, actualItemNames);\n }\n\n @Test\n public void findCustomerNames()\n {\n MutableList names = null;\n\n MutableList expectedNames = FastList.newListWith(\"Fred\", \"Mary\", \"Bill\");\n Assert.assertEquals(expectedNames, names);\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise4Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport java.util.List;\n\nimport com.gs.collections.api.block.predicate.Predicate;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport com.gs.collections.impl.utility.ArrayIterate;\nimport com.gs.collections.impl.utility.Iterate;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise4Test extends CompanyDomainForKata\n{\n /**\n * Solve this without changing the return type of {@link Company#getSuppliers()}. Find the appropriate method on\n * {@link ArrayIterate}.\n */\n @Test\n public void findSupplierNames()\n {\n MutableList supplierNames = null;\n\n MutableList expectedSupplierNames = FastList.newListWith(\n \"Shedtastic\",\n \"Splendid Crocks\",\n \"Annoying Pets\",\n \"Gnomes 'R' Us\",\n \"Furniture Hamlet\",\n \"SFD\",\n \"Doxins\");\n Assert.assertEquals(expectedSupplierNames, supplierNames);\n }\n\n /**\n * Create a {@link Predicate} for Suppliers that supply more than 2 items. Find the number of suppliers that\n * satisfy that Predicate.\n */\n @Test\n public void countSuppliersWithMoreThanTwoItems()\n {\n Predicate moreThanTwoItems = null;\n int suppliersWithMoreThanTwoItems = 0;\n Assert.assertEquals(\"suppliers with more than 2 items\", 5, suppliersWithMoreThanTwoItems);\n }\n\n /**\n * Try to solve this without changing the return type of {@link Supplier#getItemNames()}.\n */\n @Test\n public void whoSuppliesSandwichToaster()\n {\n // Create a Predicate that will check to see if a Supplier supplies a \"sandwich toaster\".\n Predicate suppliesToaster = null;\n\n // Find one supplier that supplies toasters.\n Supplier toasterSupplier = null;\n Assert.assertNotNull(\"toaster supplier\", toasterSupplier);\n Assert.assertEquals(\"Doxins\", toasterSupplier.getName());\n }\n\n @Test\n public void filterOrderValues()\n {\n List orders = this.company.getMostRecentCustomer().getOrders();\n /**\n * Get the order values that are greater than 1.5.\n */\n MutableList orderValues = null;\n MutableList filtered = null;\n Assert.assertEquals(FastList.newListWith(372.5, 1.75), filtered);\n }\n\n @Test\n public void filterOrders()\n {\n List orders = this.company.getMostRecentCustomer().getOrders();\n /**\n * Get the actual orders (not their double values) where those orders have a value greater than 2.0.\n */\n MutableList filtered = null;\n Assert.assertEquals(FastList.newListWith(Iterate.getFirst(this.company.getMostRecentCustomer().getOrders())), filtered);\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise5Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport java.util.List;\n\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.block.factory.Predicates;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport com.gs.collections.impl.test.Verify;\nimport com.gs.collections.impl.utility.Iterate;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise5Test extends CompanyDomainForKata\n{\n @Test\n public void filterOrderValues()\n {\n List orders = this.company.getMostRecentCustomer().getOrders();\n /**\n * Same exercise but don't use static utility - refactor the type of orders and {@link Customer#getOrders()}\n * instead.\n * Get the order values that are greater than 1.5.\n */\n MutableList orderValues = null;\n MutableList filtered = orderValues.select(Predicates.greaterThan(1.5));\n Assert.assertEquals(FastList.newListWith(372.5, 1.75), filtered);\n Verify.assertInstanceOf(MutableList.class, this.company.getMostRecentCustomer().getOrders());\n this.company.getMostRecentCustomer().getOrders().add(null);\n Verify.assertContains(\"Don't return a copy from Customer.getOrders(). The field should be a MutableList.\", null, this.company.getMostRecentCustomer().getOrders());\n }\n\n @Test\n public void filterOrders()\n {\n List orders = this.company.getMostRecentCustomer().getOrders();\n /**\n * Same exercise but don't use static utility - refactor the type of orders and {@link Customer#getOrders()}\n * instead.\n * Get the actual orders (not their double values) where those orders have a value greater than 2.0.\n */\n MutableList filtered = null;\n Assert.assertEquals(FastList.newListWith(Iterate.getFirst(this.company.getMostRecentCustomer().getOrders())), filtered);\n Verify.assertInstanceOf(MutableList.class, this.company.getMostRecentCustomer().getOrders());\n this.company.getMostRecentCustomer().getOrders().add(null);\n Verify.assertContains(\"Don't return a copy from Customer.getOrders(). The field should be a MutableList.\", null, this.company.getMostRecentCustomer().getOrders());\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise6Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport com.gs.collections.api.RichIterable;\nimport com.gs.collections.api.block.procedure.Procedure;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.impl.block.factory.Procedures;\nimport com.gs.collections.impl.test.Verify;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise6Test extends CompanyDomainForKata\n{\n /**\n * Get a list of the customers' total order values, sorted. Check out the implementation of {@link\n * Customer#getTotalOrderValue()} and {@link Order#getValue()} .\n */\n @Test\n public void sortedTotalOrderValue()\n {\n MutableList sortedTotalValues = null;\n\n // Don't forget the handy utility methods getFirst() and getLast()...\n Assert.assertEquals(\"Highest total order value\", Double.valueOf(857.0), sortedTotalValues.getLast());\n Assert.assertEquals(\"Lowest total order value\", Double.valueOf(71.0), sortedTotalValues.getFirst());\n }\n\n /**\n * Find the max total order value across all customers.\n */\n @Test\n public void maximumTotalOrderValue()\n {\n Double maximumTotalOrderValue = null;\n Assert.assertEquals(\"max value\", Double.valueOf(857.0), maximumTotalOrderValue);\n }\n\n /**\n * Find the customer with the highest total order value.\n */\n @Test\n public void customerWithMaxTotalOrderValue()\n {\n Customer customerWithMaxTotalOrderValue = null;\n Assert.assertEquals(this.company.getCustomerNamed(\"Mary\"), customerWithMaxTotalOrderValue);\n }\n\n /**\n * Create some code to get the company's supplier names as a tilde delimited string.\n */\n @Test\n public void supplierNamesAsTildeDelimitedString()\n {\n String tildeSeparatedNames = null;\n Assert.assertEquals(\n \"tilde separated names\",\n \"Shedtastic~Splendid Crocks~Annoying Pets~Gnomes 'R' Us~Furniture Hamlet~SFD~Doxins\",\n tildeSeparatedNames);\n }\n\n /**\n * Deliver all orders going to customers from London.\n *

\n * Hint: Use {@link RichIterable#forEach(Procedure)}. To solve the ambiguity error, use {@link Procedures#cast(Procedure)}}.\n *\n * @see Order#deliver()\n */\n @Test\n public void deliverOrdersToLondon()\n {\n Verify.assertAllSatisfy(this.company.getCustomerNamed(\"Fred\").getOrders(), Order::isDelivered);\n Verify.assertNoneSatisfy(this.company.getCustomerNamed(\"Mary\").getOrders(), Order::isDelivered);\n Verify.assertAllSatisfy(this.company.getCustomerNamed(\"Bill\").getOrders(), Order::isDelivered);\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise7Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport java.util.List;\n\nimport com.gs.collections.api.map.MutableMap;\nimport com.gs.collections.api.multimap.list.MutableListMultimap;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport com.gs.collections.impl.map.mutable.UnifiedMap;\nimport com.gs.collections.impl.test.Verify;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise7Test extends CompanyDomainForKata\n{\n /**\n * Create a multimap where the keys are the names of cities and the values are the customers from those cities.\n */\n @Test\n public void customersByCity()\n {\n // Notice that the second generic type is Customer, not List\n MutableListMultimap multimap = null;\n\n Assert.assertEquals(FastList.newListWith(this.company.getCustomerNamed(\"Mary\")), multimap.get(\"Liphook\"));\n Assert.assertEquals(\n FastList.newListWith(\n this.company.getCustomerNamed(\"Fred\"),\n this.company.getCustomerNamed(\"Bill\")),\n multimap.get(\"London\"));\n }\n\n @Test\n public void mapOfItemsToSuppliers()\n {\n Assert.fail(\"Refactor this as part of Exercise 7\");\n /**\n * Change itemsToSuppliers to a MutableMultimap\n */\n final MutableMap> itemsToSuppliers = UnifiedMap.newMap();\n\n for (Supplier supplier : this.company.getSuppliers())\n {\n for (String itemName : supplier.getItemNames())\n {\n List suppliersForItem;\n if (itemsToSuppliers.containsKey(itemName))\n {\n suppliersForItem = itemsToSuppliers.get(itemName);\n }\n else\n {\n suppliersForItem = FastList.newList();\n itemsToSuppliers.put(itemName, suppliersForItem);\n }\n\n suppliersForItem.add(supplier);\n }\n }\n Verify.assertIterableSize(\"should be 2 suppliers for sofa\", 2, itemsToSuppliers.get(\"sofa\"));\n }\n\n @Test\n public void reminder()\n {\n Assert.fail(\"Refactor setUpCustomersAndOrders() in the super class to not have so much repetition.\");\n // Delete this whole method when you're done. It's just a reminder.\n }\n}\n" }, { "path": "src/test/java/com/gs/collections/kata/Exercise8Test.java", "content": "/*\n * Copyright 2015 Goldman Sachs.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\npackage com.gs.collections.kata;\n\nimport java.util.Collections;\n\nimport com.gs.collections.api.RichIterable;\nimport com.gs.collections.api.bag.sorted.MutableSortedBag;\nimport com.gs.collections.api.block.function.Function;\nimport com.gs.collections.api.block.function.Function0;\nimport com.gs.collections.api.block.function.Function2;\nimport com.gs.collections.api.list.MutableList;\nimport com.gs.collections.api.map.MutableMap;\nimport com.gs.collections.api.multimap.list.MutableListMultimap;\nimport com.gs.collections.impl.bag.sorted.mutable.TreeBag;\nimport com.gs.collections.impl.list.mutable.FastList;\nimport com.gs.collections.impl.test.Verify;\nimport org.junit.Assert;\nimport org.junit.Test;\n\npublic class Exercise8Test extends CompanyDomainForKata\n{\n /**\n * Extra credit. Aggregate the total order values by city.\n *\n * @see RichIterable#aggregateBy(Function, Function0, Function2)\n */\n @Test\n public void totalOrderValuesByCity()\n {\n Function0 zeroValueFactory = () -> 0.0;\n Function2 aggregator = (result, customer) -> result + customer.getTotalOrderValue();\n\n MutableMap map = null;\n Assert.assertEquals(2, map.size());\n Assert.assertEquals(446.25, map.get(\"London\"), 0.0);\n Assert.assertEquals(857.0, map.get(\"Liphook\"), 0.0);\n }\n\n /**\n * Extra credit. Aggregate the total order values by item.\n * Hint: Look at {@link RichIterable#aggregateBy(Function, Function0, Function2)} and remember\n * how to use {@link RichIterable#flatCollect(Function)} to get an iterable of all items.\n */\n @Test\n public void totalOrderValuesByItem()\n {\n Function0 zeroValueFactory = () -> 0.0;\n Function2 aggregator = (result, lineItem) -> result + lineItem.getValue();\n\n MutableMap map = null;\n Verify.assertSize(12, map);\n Assert.assertEquals(100.0, map.get(\"shed\"), 0.0);\n Assert.assertEquals(10.5, map.get(\"cup\"), 0.0);\n }\n\n /**\n * Extra credit. Find all customers' line item values greater than 7.5 and sort them by highest to lowest price.\n */\n @Test\n public void sortedOrders()\n {\n MutableSortedBag orderedPrices = null;\n\n MutableSortedBag expectedPrices = TreeBag.newBagWith(\n Collections.reverseOrder(), 500.0, 150.0, 120.0, 75.0, 50.0, 50.0, 12.5);\n Verify.assertSortedBagsEqual(expectedPrices, orderedPrices);\n }\n\n /**\n * Extra credit. Figure out which customers ordered saucers (in any of their orders).\n */\n @Test\n public void whoOrderedSaucers()\n {\n MutableList customersWithSaucers = null;\n Verify.assertSize(\"customers with saucers\", 2, customersWithSaucers);\n }\n\n /**\n * Extra credit. Look into the {@link MutableList#toMap(Function, Function)} method.\n */\n @Test\n public void ordersByCustomerUsingAsMap()\n {\n MutableMap> customerNameToOrders =\n this.company.getCustomers().toMap(null, null);\n\n Assert.assertNotNull(\"customer name to orders\", customerNameToOrders);\n Verify.assertSize(\"customer names\", 3, customerNameToOrders);\n MutableList ordersForBill = customerNameToOrders.get(\"Bill\");\n Verify.assertSize(\"Bill orders\", 3, ordersForBill);\n }\n\n /**\n * Extra credit. Create a multimap where the values are customers and the key is the price of\n * the most expensive item that the customer ordered.\n */\n @Test\n public void mostExpensiveItem()\n {\n MutableListMultimap multimap = null;\n Assert.assertEquals(3, multimap.size());\n Assert.assertEquals(2, multimap.keysView().size());\n Assert.assertEquals(\n FastList.newListWith(\n this.company.getCustomerNamed(\"Fred\"),\n this.company.getCustomerNamed(\"Bill\")),\n multimap.get(50.0));\n }\n}\n" } ]