diff --git a/strategy/pom.xml b/strategy/pom.xml index c1668277a..0012775f5 100644 --- a/strategy/pom.xml +++ b/strategy/pom.xml @@ -14,5 +14,10 @@ junit test + + org.mockito + mockito-core + test + diff --git a/strategy/src/test/java/com/iluwatar/strategy/DragonSlayerTest.java b/strategy/src/test/java/com/iluwatar/strategy/DragonSlayerTest.java new file mode 100644 index 000000000..907d65ac4 --- /dev/null +++ b/strategy/src/test/java/com/iluwatar/strategy/DragonSlayerTest.java @@ -0,0 +1,48 @@ +package com.iluwatar.strategy; + +import org.junit.Test; + +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.verify; +import static org.mockito.Mockito.verifyNoMoreInteractions; + +/** + * Date: 12/29/15 - 10:50 PM + * + * @author Jeroen Meulemeester + */ +public class DragonSlayerTest { + + /** + * Verify if the dragon slayer uses the strategy during battle + */ + @Test + public void testGoToBattle() { + final DragonSlayingStrategy strategy = mock(DragonSlayingStrategy.class); + final DragonSlayer dragonSlayer = new DragonSlayer(strategy); + + dragonSlayer.goToBattle(); + verify(strategy).execute(); + verifyNoMoreInteractions(strategy); + } + + /** + * Verify if the dragon slayer uses the new strategy during battle after a change of strategy + */ + @Test + public void testChangeStrategy() throws Exception { + final DragonSlayingStrategy initialStrategy = mock(DragonSlayingStrategy.class); + final DragonSlayer dragonSlayer = new DragonSlayer(initialStrategy); + + dragonSlayer.goToBattle(); + verify(initialStrategy).execute(); + + final DragonSlayingStrategy newStrategy = mock(DragonSlayingStrategy.class); + dragonSlayer.changeStrategy(newStrategy); + + dragonSlayer.goToBattle(); + verify(newStrategy).execute(); + + verifyNoMoreInteractions(initialStrategy, newStrategy); + } +} \ No newline at end of file diff --git a/strategy/src/test/java/com/iluwatar/strategy/DragonSlayingStrategyTest.java b/strategy/src/test/java/com/iluwatar/strategy/DragonSlayingStrategyTest.java new file mode 100644 index 000000000..f9d18e22c --- /dev/null +++ b/strategy/src/test/java/com/iluwatar/strategy/DragonSlayingStrategyTest.java @@ -0,0 +1,104 @@ +package com.iluwatar.strategy; + +import org.junit.After; +import org.junit.Before; +import org.junit.Test; +import org.junit.runner.RunWith; +import org.junit.runners.Parameterized; + +import java.io.PrintStream; +import java.util.Arrays; +import java.util.Collection; + +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.verify; +import static org.mockito.Mockito.verifyNoMoreInteractions; + +/** + * Date: 12/29/15 - 10:58 PM + * + * @author Jeroen Meulemeester + */ +@RunWith(Parameterized.class) +public class DragonSlayingStrategyTest { + + /** + * @return The test parameters for each cycle + */ + @Parameterized.Parameters + public static Collection data() { + return Arrays.asList( + new Object[]{ + new MeleeStrategy(), + "With your Excalibur you severe the dragon's head!" + }, + new Object[]{ + new ProjectileStrategy(), + "You shoot the dragon with the magical crossbow and it falls dead on the ground!" + }, + new Object[]{ + new SpellStrategy(), + "You cast the spell of disintegration and the dragon vaporizes in a pile of dust!" + } + ); + } + + /** + * The tested strategy + */ + private final DragonSlayingStrategy strategy; + + /** + * The expected action on the std-out + */ + private final String expectedResult; + + /** + * The mocked standard out {@link PrintStream}, required since some actions don't have any + * influence on accessible objects, except for writing to std-out using {@link System#out} + */ + private final PrintStream stdOutMock = mock(PrintStream.class); + + /** + * Keep the original std-out so it can be restored after the test + */ + private final PrintStream stdOutOrig = System.out; + + /** + * Create a new test instance for the given strategy + * + * @param strategy The tested strategy + * @param expectedResult The expected result + */ + public DragonSlayingStrategyTest(final DragonSlayingStrategy strategy, final String expectedResult) { + this.strategy = strategy; + this.expectedResult = expectedResult; + } + + /** + * Inject the mocked std-out {@link PrintStream} into the {@link System} class before each test + */ + @Before + public void setUp() { + System.setOut(this.stdOutMock); + } + + /** + * Removed the mocked std-out {@link PrintStream} again from the {@link System} class + */ + @After + public void tearDown() { + System.setOut(this.stdOutOrig); + } + + /** + * Test if executing the strategy gives the correct response + */ + @Test + public void testExecute() { + this.strategy.execute(); + verify(this.stdOutMock).println(this.expectedResult); + verifyNoMoreInteractions(this.stdOutMock); + } + +} \ No newline at end of file