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Added proper tests for front-controller pattern
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6 files changed

+263
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‎front-controller/pom.xml‎

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<artifactId>junit</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎front-controller/src/test/java/com/iluwatar/front/controller/ApplicationExceptionTest.java‎

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package com.iluwatar.front.controller;
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import org.junit.Test;
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import static org.junit.Assert.*;
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/**
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* Date: 12/13/15 - 1:35 PM
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*
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* @author Jeroen Meulemeester
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*/
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public class ApplicationExceptionTest {
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@Test
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public void testCause() throws Exception {
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final Exception cause = new Exception();
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assertSame(cause, new ApplicationException(cause).getCause());
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}
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}

‎front-controller/src/test/java/com/iluwatar/front/controller/CommandTest.java‎

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package com.iluwatar.front.controller;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.Parameterized;
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import org.junit.runners.Parameterized.Parameters;
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import java.util.ArrayList;
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import java.util.List;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.verifyNoMoreInteractions;
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import static org.mockito.Mockito.verifyZeroInteractions;
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/**
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* Date: 12/13/15 - 1:39 PM
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*
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* @author Jeroen Meulemeester
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*/
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@RunWith(Parameterized.class)
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public class CommandTest extends StdOutTest {
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@Parameters
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public static List<Object[]> data() {
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final List<Object[]> parameters = new ArrayList<>();
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parameters.add(new Object[]{"Archer", "Displaying archers"});
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parameters.add(new Object[]{"Catapult", "Displaying catapults"});
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parameters.add(new Object[]{"NonExistentCommand", "Error 500"});
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return parameters;
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}
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/**
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* The view that's been tested
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*/
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private final String request;
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/**
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* The expected display message
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*/
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private final String displayMessage;
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/**
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* Create a new instance of the {@link CommandTest} with the given view and expected message
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*
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* @param request The request that's been tested
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* @param displayMessage The expected display message
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*/
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public CommandTest(final String request, final String displayMessage) {
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this.displayMessage = displayMessage;
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this.request = request;
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}
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@Test
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public void testDisplay() {
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final FrontController frontController = new FrontController();
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verifyZeroInteractions(getStdOutMock());
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frontController.handleRequest(request);
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verify(getStdOutMock()).println(displayMessage);
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verifyNoMoreInteractions(getStdOutMock());
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}
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}

‎front-controller/src/test/java/com/iluwatar/front/controller/FrontControllerTest.java‎

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package com.iluwatar.front.controller;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.Parameterized;
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import org.junit.runners.Parameterized.Parameters;
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import java.util.ArrayList;
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import java.util.List;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.verifyNoMoreInteractions;
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import static org.mockito.Mockito.verifyZeroInteractions;
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/**
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* Date: 12/13/15 - 1:39 PM
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*
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* @author Jeroen Meulemeester
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*/
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@RunWith(Parameterized.class)
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public class FrontControllerTest extends StdOutTest {
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@Parameters
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public static List<Object[]> data() {
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final List<Object[]> parameters = new ArrayList<>();
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parameters.add(new Object[]{new ArcherCommand(), "Displaying archers"});
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parameters.add(new Object[]{new CatapultCommand(), "Displaying catapults"});
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parameters.add(new Object[]{new UnknownCommand(), "Error 500"});
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return parameters;
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}
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/**
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* The view that's been tested
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*/
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private final Command command;
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/**
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* The expected display message
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*/
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private final String displayMessage;
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/**
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* Create a new instance of the {@link FrontControllerTest} with the given view and expected message
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*
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* @param command The command that's been tested
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* @param displayMessage The expected display message
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*/
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public FrontControllerTest(final Command command, final String displayMessage) {
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this.displayMessage = displayMessage;
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this.command = command;
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}
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@Test
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public void testDisplay() {
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verifyZeroInteractions(getStdOutMock());
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this.command.process();
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verify(getStdOutMock()).println(displayMessage);
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verifyNoMoreInteractions(getStdOutMock());
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}
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}

‎front-controller/src/test/java/com/iluwatar/front/controller/StdOutTest.java‎

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package com.iluwatar.front.controller;
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import org.junit.After;
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import org.junit.Before;
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import java.io.PrintStream;
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import static org.mockito.Mockito.mock;
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/**
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* Date: 12/10/15 - 8:37 PM
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*
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* @author Jeroen Meulemeester
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*/
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public abstract class StdOutTest {
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/**
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* The mocked standard out {@link PrintStream}, required since the actions of the views don't have
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* any influence on any other accessible objects, except for writing to std-out using {@link
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* System#out}
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*/
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private final PrintStream stdOutMock = mock(PrintStream.class);
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/**
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* Keep the original std-out so it can be restored after the test
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*/
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private final PrintStream stdOutOrig = System.out;
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/**
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* Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test
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*/
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@Before
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public void setUp() {
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System.setOut(this.stdOutMock);
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}
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/**
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* Removed the mocked std-out {@link PrintStream} again from the {@link System} class
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*/
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@After
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public void tearDown() {
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System.setOut(this.stdOutOrig);
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}
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/**
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* Get the mocked stdOut {@link PrintStream}
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*
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* @return The stdOut print stream mock, renewed before each test
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*/
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final PrintStream getStdOutMock() {
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return this.stdOutMock;
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}
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}

‎front-controller/src/test/java/com/iluwatar/front/controller/ViewTest.java‎

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package com.iluwatar.front.controller;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.Parameterized;
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import org.junit.runners.Parameterized.Parameters;
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import java.util.ArrayList;
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import java.util.List;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.verifyNoMoreInteractions;
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import static org.mockito.Mockito.verifyZeroInteractions;
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/**
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* Date: 12/13/15 - 1:39 PM
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*
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* @author Jeroen Meulemeester
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*/
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@RunWith(Parameterized.class)
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public class ViewTest extends StdOutTest {
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@Parameters
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public static List<Object[]> data() {
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final List<Object[]> parameters = new ArrayList<>();
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parameters.add(new Object[]{new ArcherView(), "Displaying archers"});
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parameters.add(new Object[]{new CatapultView(), "Displaying catapults"});
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parameters.add(new Object[]{new ErrorView(), "Error 500"});
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return parameters;
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}
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/**
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* The view that's been tested
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*/
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private final View view;
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/**
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* The expected display message
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*/
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private final String displayMessage;
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/**
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* Create a new instance of the {@link ViewTest} with the given view and expected message
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*
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* @param view The view that's been tested
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* @param displayMessage The expected display message
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*/
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public ViewTest(final View view, final String displayMessage) {
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this.displayMessage = displayMessage;
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this.view = view;
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}
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@Test
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public void testDisplay() {
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verifyZeroInteractions(getStdOutMock());
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this.view.display();
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verify(getStdOutMock()).println(displayMessage);
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verifyNoMoreInteractions(getStdOutMock());
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}
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}

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