Activity activity2 = manager.getActivity("userX", "self", "5", null, "4");
assertNotNull(activity2);
assertEquals("userX", activity2.getUserId());
assertEquals("Adding Gadget", activity2.getTitle());
activity1.setTitle("New Comment added");
manager.updateActivity("userX", activity1);
activity2 = manager.getActivity("userX", "self", "5", null, "4");
assertNotNull(activity2);
assertEquals("userX", activity2.getUserId());
assertEquals("New Comment added", activity2.getTitle());