public void should_destroy_and_dispose_system()
{
var observableGroupManager = Substitute.For <IObservableGroupManager>();
var threadHandler = Substitute.For <IThreadHandler>();
var observableScheduler = Substitute.For <IUpdateScheduler>();
var mockSystem = Substitute.For <IBasicEntitySystem>();
var mockDisposable = Substitute.For <IDisposable>();
var systemHandler = new BasicEntitySystemHandler(observableGroupManager, threadHandler, observableScheduler);
systemHandler._systemSubscriptions.Add(mockSystem, mockDisposable);
systemHandler.DestroySystem(mockSystem);
mockDisposable.Received(1).Dispose();
Assert.Equal(0, systemHandler._systemSubscriptions.Count);
}
