Add tests that run the examples

callback/src/test/java/com/iluwatar/callback/AppTest.java

@@ -24,56 +24,15 @@ package com.iluwatar.callback;
 
 import org.junit.Test;
 
-import static org.junit.Assert.assertEquals;
+import java.io.IOException;
 
 /**
- * Add a field as a counter. Every time the callback method is called increment this field. Unit
- * test checks that the field is being incremented.
- *
- * Could be done with mock objects as well where the call method call is verified.
+ * Tests that Callback example runs without errors.
  */
 public class AppTest {
-
-  private Integer callingCount = 0;
-
   @Test
-  public void test() {
-    Callback callback = new Callback() {
-      @Override
-      public void call() {
-        callingCount++;
-      }
-    };
-
-    Task task = new SimpleTask();
-
-    assertEquals("Initial calling count of 0", new Integer(0), callingCount);
-
-    task.executeWith(callback);
-
-    assertEquals("Callback called once", new Integer(1), callingCount);
-
-    task.executeWith(callback);
-
-    assertEquals("Callback called twice", new Integer(2), callingCount);
-
-  }
-
-  @Test
-  public void testWithLambdasExample() {
-    Callback callback = () -> callingCount++;
-
-    Task task = new SimpleTask();
-
-    assertEquals("Initial calling count of 0", new Integer(0), callingCount);
-
-    task.executeWith(callback);
-
-    assertEquals("Callback called once", new Integer(1), callingCount);
-
-    task.executeWith(callback);
-
-    assertEquals("Callback called twice", new Integer(2), callingCount);
-
+  public void test() throws IOException {
+    String[] args = {};
+    App.main(args);
   }
 }

callback/src/test/java/com/iluwatar/callback/CallbackTest.java

@@ -0,0 +1,79 @@
+/**
+ * The MIT License
+ * Copyright (c) 2014 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package com.iluwatar.callback;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Add a field as a counter. Every time the callback method is called increment this field. Unit
+ * test checks that the field is being incremented.
+ *
+ * Could be done with mock objects as well where the call method call is verified.
+ */
+public class CallbackTest {
+
+  private Integer callingCount = 0;
+
+  @Test
+  public void test() {
+    Callback callback = new Callback() {
+      @Override
+      public void call() {
+        callingCount++;
+      }
+    };
+
+    Task task = new SimpleTask();
+
+    assertEquals("Initial calling count of 0", new Integer(0), callingCount);
+
+    task.executeWith(callback);
+
+    assertEquals("Callback called once", new Integer(1), callingCount);
+
+    task.executeWith(callback);
+
+    assertEquals("Callback called twice", new Integer(2), callingCount);
+
+  }
+
+  @Test
+  public void testWithLambdasExample() {
+    Callback callback = () -> callingCount++;
+
+    Task task = new SimpleTask();
+
+    assertEquals("Initial calling count of 0", new Integer(0), callingCount);
+
+    task.executeWith(callback);
+
+    assertEquals("Callback called once", new Integer(1), callingCount);
+
+    task.executeWith(callback);
+
+    assertEquals("Callback called twice", new Integer(2), callingCount);
+
+  }
+}