public void Clear()
            {
                appEvent.RegisterListener(CreateListener());

                appEvent.Clear();

                Assert.AreEqual(appEvent.ListenerCount, 0);
            }
            public void UnregersterOneListener()
            {
                AppEventListener listener = CreateListener();

                appEvent.RegisterListener(listener);

                Assert.True(appEvent.UnregisterListener(listener));
            }
 public void RegersterOneListener()
 {
     Assert.True(appEvent.RegisterListener(CreateListener()));
 }
            public void RaiseEventWithListener()
            {
                appEvent.RegisterListener(CreateListener());

                Assert.True(appEvent.RaiseEvent());
            }