public void listener_mapped_twice_and_removed_once_doesnt_fire()
{
eventMap.MapListener(eventDispatcher, CustomEvent.Type.STARTED, (Action <IEvent>)listenerWithCounter, typeof(CustomEvent));
eventMap.MapListener(eventDispatcher, CustomEvent.Type.STARTED, (Action <IEvent>)listenerWithCounter, typeof(CustomEvent));
eventMap.UnmapListener(eventDispatcher, CustomEvent.Type.STARTED, (Action <IEvent>)listenerWithCounter, typeof(CustomEvent));
eventDispatcher.Dispatch(new CustomEvent(CustomEvent.Type.STARTED));
Assert.That(listenerExecutedCount, Is.EqualTo(0));
}