public void Test() { var array = new[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; var scheduler = new MainloopScheduler(); array.ToObservable().ObserveOn(scheduler).Subscribe(v => _currval = v); for (int i = 0; i < array.Length * 3; i++) { if (i % 3 == 0) { scheduler.Mainloop(); Assert.Equal(i / 3, _currval); } } }