Add proper unit tests for dependency-injection pattern

dependency-injection/src/test/java/com/iluwatar/dependency/injection/SimpleWizardTest.java

@@ -0,0 +1,33 @@
+package com.iluwatar.dependency.injection;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.PrintStream;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+
+/**
+ * Date: 12/10/15 - 8:26 PM
+ *
+ * @author Jeroen Meulemeester
+ */
+public class SimpleWizardTest extends StdOutTest {
+
+  /**
+   * Test if the {@link SimpleWizard} does the only thing it can do: Smoke it's {@link
+   * OldTobyTobacco}
+   */
+  @Test
+  public void testSmoke() {
+    final SimpleWizard simpleWizard = new SimpleWizard();
+    simpleWizard.smoke();
+    verify(getStdOutMock(), times(1)).println("SimpleWizard smoking OldTobyTobacco");
+    verifyNoMoreInteractions(getStdOutMock());
+  }
+
+}