@@ -9,15 +9,6 @@
  */
 public class SampleJavaProjectTest extends TestCase {
 
-    /**
-     * JUnit boilerplate.
-     *
-     * @param name the name string
-     */
-    public SampleJavaProjectTest(final String name) {
-        super(name);
-    }
-
     /**
      * Holds an instance of the class we are testing.
      */
@@ -35,5 +26,7 @@ public final void setUp() {
      */
     public final void testAdd() {
         assertEquals(sjp.add(3, 4), 7);
+        assertEquals(sjp.add(5, -5), 0);
+        assertEquals(sjp.add(-3, 4), 1);
     }
 }