Added tests for layers pattern

layers/pom.xml

@@ -32,5 +32,10 @@
 			<artifactId>junit</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>

layers/src/main/java/com/iluwatar/layers/CakeBakingServiceImpl.java

@@ -30,9 +30,9 @@ public class CakeBakingServiceImpl implements CakeBakingService {
 
   @Override
   public void bakeNewCake(CakeInfo cakeInfo) throws CakeBakingException {
-    List<CakeToppingInfo> allToppings = getAvailableToppings();
+    List<CakeTopping> allToppings = getAvailableToppingEntities();
-    List<CakeToppingInfo> matchingToppings =
+    List<CakeTopping> matchingToppings =
-        allToppings.stream().filter((t) -> t.name.equals(cakeInfo.cakeToppingInfo.name))
+        allToppings.stream().filter((t) -> t.getName().equals(cakeInfo.cakeToppingInfo.name))
             .collect(Collectors.toList());
     if (matchingToppings.isEmpty()) {
       throw new CakeBakingException(String.format("Topping %s is not available",
@@ -50,7 +50,7 @@ public class CakeBakingServiceImpl implements CakeBakingService {
       }
     }
     CakeToppingDao toppingBean = context.getBean(CakeToppingDao.class);
-    CakeTopping topping = toppingBean.findOne(matchingToppings.iterator().next().id.get());
+    CakeTopping topping = toppingBean.findOne(matchingToppings.iterator().next().getId());
     CakeDao cakeBean = context.getBean(CakeDao.class);
     Cake cake = new Cake();
     cake.setTopping(topping);

layers/src/main/java/com/iluwatar/layers/CakeInfo.java

@@ -34,7 +34,7 @@ public class CakeInfo {
 
   @Override
   public String toString() {
-    return String.format("CakeInfo id=%d topping=%s layers=%s totalCalories=%d", id.get(),
+    return String.format("CakeInfo id=%d topping=%s layers=%s totalCalories=%d", id.orElse(-1L),
         cakeToppingInfo, cakeLayerInfos, calculateTotalCalories());
   }
 }

layers/src/main/java/com/iluwatar/layers/CakeLayerInfo.java

@@ -27,6 +27,6 @@ public class CakeLayerInfo {
 
   @Override
   public String toString() {
-    return String.format("CakeLayerInfo id=%d name=%s calories=%d", id.get(), name, calories);
+    return String.format("CakeLayerInfo id=%d name=%s calories=%d", id.orElse(-1L), name, calories);
   }
 }

layers/src/main/java/com/iluwatar/layers/CakeTopping.java

@@ -58,7 +58,7 @@ public class CakeTopping {
 
   @Override
   public String toString() {
-    return String.format("id=%s name=%s calories=%d", name, calories);
+    return String.format("id=%s name=%s calories=%d", id, name, calories);
   }
 
   public Cake getCake() {

layers/src/main/java/com/iluwatar/layers/CakeToppingInfo.java

@@ -27,6 +27,6 @@ public class CakeToppingInfo {
 
   @Override
   public String toString() {
-    return String.format("CakeToppingInfo id=%d name=%s calories=%d", id.get(), name, calories);
+    return String.format("CakeToppingInfo id=%d name=%s calories=%d", id.orElse(-1L), name, calories);
   }
 }

layers/src/test/java/com/iluwatar/layers/CakeBakingExceptionTest.java

@@ -0,0 +1,30 @@
+package com.iluwatar.layers;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+/**
+ * Date: 12/15/15 - 7:57 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class CakeBakingExceptionTest {
+
+  @Test
+  public void testConstructor() throws Exception {
+    final CakeBakingException exception = new CakeBakingException();
+    assertNull(exception.getMessage());
+    assertNull(exception.getCause());
+  }
+
+  @Test
+  public void testConstructorWithMessage() throws Exception {
+    final String expectedMessage = "message";
+    final CakeBakingException exception = new CakeBakingException(expectedMessage);
+    assertEquals(expectedMessage, exception.getMessage());
+    assertNull(exception.getCause());
+  }
+
+}

layers/src/test/java/com/iluwatar/layers/CakeBakingServiceImplTest.java

@@ -0,0 +1,159 @@
+package com.iluwatar.layers;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Date: 12/15/15 - 9:55 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class CakeBakingServiceImplTest {
+
+  @Test
+  public void testLayers() throws CakeBakingException {
+    final CakeBakingServiceImpl service = new CakeBakingServiceImpl();
+
+    final List<CakeLayerInfo> initialLayers = service.getAvailableLayers();
+    assertNotNull(initialLayers);
+    assertTrue(initialLayers.isEmpty());
+
+    service.saveNewLayer(new CakeLayerInfo("Layer1", 1000));
+    service.saveNewLayer(new CakeLayerInfo("Layer2", 2000));
+
+    final List<CakeLayerInfo> availableLayers = service.getAvailableLayers();
+    assertNotNull(availableLayers);
+    assertEquals(2, availableLayers.size());
+    for (final CakeLayerInfo layer : availableLayers) {
+      assertNotNull(layer.id);
+      assertNotNull(layer.name);
+      assertNotNull(layer.toString());
+      assertTrue(layer.calories > 0);
+    }
+
+  }
+
+  @Test
+  public void testToppings() throws CakeBakingException {
+    final CakeBakingServiceImpl service = new CakeBakingServiceImpl();
+
+    final List<CakeToppingInfo> initialToppings = service.getAvailableToppings();
+    assertNotNull(initialToppings);
+    assertTrue(initialToppings.isEmpty());
+
+    service.saveNewTopping(new CakeToppingInfo("Topping1", 1000));
+    service.saveNewTopping(new CakeToppingInfo("Topping2", 2000));
+
+    final List<CakeToppingInfo> availableToppings = service.getAvailableToppings();
+    assertNotNull(availableToppings);
+    assertEquals(2, availableToppings.size());
+    for (final CakeToppingInfo topping : availableToppings) {
+      assertNotNull(topping.id);
+      assertNotNull(topping.name);
+      assertNotNull(topping.toString());
+      assertTrue(topping.calories > 0);
+    }
+
+  }
+
+  @Test
+  public void testBakeCakes() throws CakeBakingException {
+    final CakeBakingServiceImpl service = new CakeBakingServiceImpl();
+
+    final List<CakeInfo> initialCakes = service.getAllCakes();
+    assertNotNull(initialCakes);
+    assertTrue(initialCakes.isEmpty());
+
+    final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000);
+    final CakeToppingInfo topping2 = new CakeToppingInfo("Topping2", 2000);
+    service.saveNewTopping(topping1);
+    service.saveNewTopping(topping2);
+
+    final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000);
+    final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000);
+    final CakeLayerInfo layer3 = new CakeLayerInfo("Layer3", 2000);
+    service.saveNewLayer(layer1);
+    service.saveNewLayer(layer2);
+    service.saveNewLayer(layer3);
+
+    service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, layer2)));
+    service.bakeNewCake(new CakeInfo(topping2, Collections.singletonList(layer3)));
+
+    final List<CakeInfo> allCakes = service.getAllCakes();
+    assertNotNull(allCakes);
+    assertEquals(2, allCakes.size());
+    for (final CakeInfo cakeInfo : allCakes) {
+      assertNotNull(cakeInfo.id);
+      assertNotNull(cakeInfo.cakeToppingInfo);
+      assertNotNull(cakeInfo.cakeLayerInfos);
+      assertNotNull(cakeInfo.toString());
+      assertFalse(cakeInfo.cakeLayerInfos.isEmpty());
+      assertTrue(cakeInfo.calculateTotalCalories() > 0);
+    }
+
+  }
+
+  @Test(expected = CakeBakingException.class)
+  public void testBakeCakeMissingTopping() throws CakeBakingException {
+    final CakeBakingServiceImpl service = new CakeBakingServiceImpl();
+
+    final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000);
+    final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000);
+    service.saveNewLayer(layer1);
+    service.saveNewLayer(layer2);
+
+    final CakeToppingInfo missingTopping = new CakeToppingInfo("Topping1", 1000);
+    service.bakeNewCake(new CakeInfo(missingTopping, Arrays.asList(layer1, layer2)));
+  }
+
+  @Test(expected = CakeBakingException.class)
+  public void testBakeCakeMissingLayer() throws CakeBakingException {
+    final CakeBakingServiceImpl service = new CakeBakingServiceImpl();
+
+    final List<CakeInfo> initialCakes = service.getAllCakes();
+    assertNotNull(initialCakes);
+    assertTrue(initialCakes.isEmpty());
+
+    final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000);
+    service.saveNewTopping(topping1);
+
+    final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000);
+    service.saveNewLayer(layer1);
+
+    final CakeLayerInfo missingLayer = new CakeLayerInfo("Layer2", 2000);
+    service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, missingLayer)));
+
+  }
+
+  @Test(expected = CakeBakingException.class)
+  public void testBakeCakesUsedLayer() throws CakeBakingException {
+    final CakeBakingServiceImpl service = new CakeBakingServiceImpl();
+
+    final List<CakeInfo> initialCakes = service.getAllCakes();
+    assertNotNull(initialCakes);
+    assertTrue(initialCakes.isEmpty());
+
+    final CakeToppingInfo topping1 = new CakeToppingInfo("Topping1", 1000);
+    final CakeToppingInfo topping2 = new CakeToppingInfo("Topping2", 2000);
+    service.saveNewTopping(topping1);
+    service.saveNewTopping(topping2);
+
+    final CakeLayerInfo layer1 = new CakeLayerInfo("Layer1", 1000);
+    final CakeLayerInfo layer2 = new CakeLayerInfo("Layer2", 2000);
+    service.saveNewLayer(layer1);
+    service.saveNewLayer(layer2);
+
+    service.bakeNewCake(new CakeInfo(topping1, Arrays.asList(layer1, layer2)));
+    service.bakeNewCake(new CakeInfo(topping2, Collections.singletonList(layer2)));
+
+  }
+
+}

layers/src/test/java/com/iluwatar/layers/CakeTest.java

@@ -0,0 +1,97 @@
+package com.iluwatar.layers;
+
+import org.junit.Test;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Date: 12/15/15 - 8:02 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class CakeTest {
+
+  @Test
+  public void testSetId() {
+    final Cake cake = new Cake();
+    assertNull(cake.getId());
+
+    final Long expectedId = Long.valueOf(1234L);
+    cake.setId(expectedId);
+    assertEquals(expectedId, cake.getId());
+  }
+
+  @Test
+  public void testSetTopping() {
+    final Cake cake = new Cake();
+    assertNull(cake.getTopping());
+
+    final CakeTopping expectedTopping = new CakeTopping("DummyTopping", 1000);
+    cake.setTopping(expectedTopping);
+    assertEquals(expectedTopping, cake.getTopping());
+  }
+
+  @Test
+  public void testSetLayers() {
+    final Cake cake = new Cake();
+    assertNotNull(cake.getLayers());
+    assertTrue(cake.getLayers().isEmpty());
+
+    final Set<CakeLayer> expectedLayers = new HashSet<>();
+    expectedLayers.add(new CakeLayer("layer1", 1000));
+    expectedLayers.add(new CakeLayer("layer2", 2000));
+    expectedLayers.add(new CakeLayer("layer3", 3000));
+
+    cake.setLayers(expectedLayers);
+    assertEquals(expectedLayers, cake.getLayers());
+  }
+
+  @Test
+  public void testAddLayer() {
+    final Cake cake = new Cake();
+    assertNotNull(cake.getLayers());
+    assertTrue(cake.getLayers().isEmpty());
+
+    final Set<CakeLayer> initialLayers = new HashSet<>();
+    initialLayers.add(new CakeLayer("layer1", 1000));
+    initialLayers.add(new CakeLayer("layer2", 2000));
+
+    cake.setLayers(initialLayers);
+    assertEquals(initialLayers, cake.getLayers());
+
+    final CakeLayer newLayer = new CakeLayer("layer3", 3000);
+    cake.addLayer(newLayer);
+
+    final Set<CakeLayer> expectedLayers = new HashSet<>();
+    expectedLayers.addAll(initialLayers);
+    expectedLayers.addAll(initialLayers);
+    expectedLayers.add(newLayer);
+    assertEquals(expectedLayers, cake.getLayers());
+  }
+
+  @Test
+  public void testToString() {
+    final CakeTopping topping = new CakeTopping("topping", 20);
+    topping.setId(2345L);
+
+    final CakeLayer layer = new CakeLayer("layer", 100);
+    layer.setId(3456L);
+
+    final Cake cake = new Cake();
+    cake.setId(1234L);
+    cake.setTopping(topping);
+    cake.addLayer(layer);
+
+    final String expected = "id=1234 topping=id=2345 name=topping calories=20 " +
+            "layers=[id=3456 name=layer calories=100]";
+    assertEquals(expected, cake.toString());
+
+  }
+
+}

layers/src/test/java/com/iluwatar/layers/CakeViewImplTest.java

@@ -0,0 +1,48 @@
+package com.iluwatar.layers;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
+import static org.mockito.Mockito.when;
+
+/**
+ * Date: 12/15/15 - 10:04 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class CakeViewImplTest extends StdOutTest {
+
+  /**
+   * Verify if the cake view renders the expected result
+   */
+  @Test
+  public void testRender() {
+
+    final List<CakeLayerInfo> layers = new ArrayList<>();
+    layers.add(new CakeLayerInfo("layer1", 1000));
+    layers.add(new CakeLayerInfo("layer2", 2000));
+    layers.add(new CakeLayerInfo("layer3", 3000));
+
+    final List<CakeInfo> cakes = new ArrayList<>();
+    final CakeInfo cake = new CakeInfo(new CakeToppingInfo("topping", 1000), layers);
+    cakes.add(cake);
+
+    final CakeBakingService bakingService = mock(CakeBakingService.class);
+    when(bakingService.getAllCakes()).thenReturn(cakes);
+
+    final CakeViewImpl cakeView = new CakeViewImpl(bakingService);
+
+    verifyZeroInteractions(getStdOutMock());
+
+    cakeView.render();
+    verify(getStdOutMock(), times(1)).println(cake);
+
+  }
+
+}

layers/src/test/java/com/iluwatar/layers/StdOutTest.java

@@ -0,0 +1,54 @@
+package com.iluwatar.layers;
+
+import org.junit.After;
+import org.junit.Before;
+
+import java.io.PrintStream;
+
+import static org.mockito.Mockito.mock;
+
+/**
+ * Date: 12/10/15 - 8:37 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public abstract class StdOutTest {
+
+  /**
+   * The mocked standard out {@link PrintStream}, required since the actions of the views don't have
+   * any influence on any other 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;
+
+  /**
+   * 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);
+  }
+
+  /**
+   * Get the mocked stdOut {@link PrintStream}
+   *
+   * @return The stdOut print stream mock, renewed before each test
+   */
+  final PrintStream getStdOutMock() {
+    return this.stdOutMock;
+  }
+
+}