public void RemoveListener_CanBeCalledFromUpdate()
{
// Arrange
var updateSource = new AsyncUpdateSource();
var observer = Substitute.For <IAsyncUpdatable>();
observer.When(x => x.Update(Arg.Any <float>())).Do(x => updateSource.RemoveListener(observer));
updateSource.AddListener(observer);
// Act
updateSource.OnNext(0);
updateSource.OnNext(0);
// Assert
observer.Received(1).Update(Arg.Any <float>());
}
public void Dispose()
{
_parent.RemoveListener(_observer);
}