Added tests for proxy pattern

proxy/pom.xml

@@ -14,5 +14,10 @@
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 </project>

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

@@ -0,0 +1,53 @@
+package com.iluwatar.proxy;
+
+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 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;
+
+  /**
+   * 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;
+  }
+
+}

proxy/src/test/java/com/iluwatar/proxy/WizardTest.java

@@ -0,0 +1,22 @@
+package com.iluwatar.proxy;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Date: 12/28/15 - 9:02 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class WizardTest {
+
+  @Test
+  public void testToString() throws Exception {
+    final String[] wizardNames = {"Gandalf", "Dumbledore", "Oz", "Merlin"};
+    for (final String name : wizardNames) {
+      assertEquals(name, new Wizard(name).toString());
+    }
+  }
+
+}

proxy/src/test/java/com/iluwatar/proxy/WizardTowerProxyTest.java

@@ -0,0 +1,38 @@
+package com.iluwatar.proxy;
+
+import org.junit.Test;
+import org.mockito.InOrder;
+
+import static org.mockito.Mockito.inOrder;
+
+/**
+ * Date: 12/28/15 - 9:18 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class WizardTowerProxyTest extends StdOutTest {
+
+  @Test
+  public void testEnter() throws Exception {
+    final Wizard[] wizards = new Wizard[]{
+            new Wizard("Gandalf"),
+            new Wizard("Dumbledore"),
+            new Wizard("Oz"),
+            new Wizard("Merlin")
+    };
+
+    final WizardTowerProxy tower = new WizardTowerProxy();
+    for (final Wizard wizard : wizards) {
+      tower.enter(wizard);
+    }
+
+    final InOrder inOrder = inOrder(getStdOutMock());
+    inOrder.verify(getStdOutMock()).println("Gandalf enters the tower.");
+    inOrder.verify(getStdOutMock()).println("Dumbledore enters the tower.");
+    inOrder.verify(getStdOutMock()).println("Oz enters the tower.");
+    inOrder.verify(getStdOutMock()).println("Merlin is not allowed to enter!");
+    inOrder.verifyNoMoreInteractions();
+
+  }
+
+}

proxy/src/test/java/com/iluwatar/proxy/WizardTowerTest.java

@@ -0,0 +1,38 @@
+package com.iluwatar.proxy;
+
+import org.junit.Test;
+import org.mockito.InOrder;
+
+import static org.mockito.Mockito.inOrder;
+
+/**
+ * Date: 12/28/15 - 9:18 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class WizardTowerTest extends StdOutTest {
+
+  @Test
+  public void testEnter() throws Exception {
+    final Wizard[] wizards = new Wizard[]{
+            new Wizard("Gandalf"),
+            new Wizard("Dumbledore"),
+            new Wizard("Oz"),
+            new Wizard("Merlin")
+    };
+
+    final WizardTower tower = new WizardTower();
+    for (final Wizard wizard : wizards) {
+      tower.enter(wizard);
+    }
+
+    final InOrder inOrder = inOrder(getStdOutMock());
+    inOrder.verify(getStdOutMock()).println("Gandalf enters the tower.");
+    inOrder.verify(getStdOutMock()).println("Dumbledore enters the tower.");
+    inOrder.verify(getStdOutMock()).println("Oz enters the tower.");
+    inOrder.verify(getStdOutMock()).println("Merlin enters the tower.");
+    inOrder.verifyNoMoreInteractions();
+
+  }
+
+}