public void testNotMergeable() {
   ViewStateModel child = new ViewStateModel("child");
   ViewStateModel parent = new ViewStateModel("parent");
   assertFalse(child.isMergeableWith(parent));
 }
 public void testNotMergeableWithNull() {
   ViewStateModel child = new ViewStateModel("child");
   assertFalse(child.isMergeableWith(null));
 }
 public void testMergeable() {
   ViewStateModel child = new ViewStateModel("child");
   assertTrue(child.isMergeableWith(child));
 }