def test_eventloop_schedule_action_periodic(self):
        scheduler = EventLoopScheduler(exit_if_empty=False)
        gate = threading.Semaphore(0)
        period = 0.05
        counter = 3

        def action(state):
            nonlocal counter
            if state:
                counter -= 1
                return state - 1
            if counter == 0:
                gate.release()

        disp = scheduler.schedule_periodic(period, action, counter)

        def dispose(scheduler, state):
            disp.dispose()
            gate.release()

        gate.acquire()
        assert counter == 0
        assert scheduler._has_thread() is True
        scheduler.schedule(dispose)
        gate.acquire()
        assert scheduler._has_thread() is True
        sleep(period)
        scheduler.dispose()
        sleep(period)
        assert scheduler._has_thread() is False
    def test_eventloop_schedule_action_periodic(self):
        scheduler = EventLoopScheduler(exit_if_empty=False)
        gate = threading.Semaphore(0)
        period = 0.05
        counter = 3

        def action(state):
            nonlocal counter
            if state:
                counter -= 1
                return state - 1
            if counter == 0:
                gate.release()

        disp = scheduler.schedule_periodic(period, action, counter)

        def dispose(scheduler, state):
            disp.dispose()
            gate.release()

        gate.acquire()
        assert counter == 0
        assert scheduler._has_thread() is True
        scheduler.schedule(dispose)

        gate.acquire()
        assert scheduler._has_thread() is True
        sleep(period)
        scheduler.dispose()
        sleep(period)
        assert scheduler._has_thread() is False
    def test_eventloop_schedule_periodic_dispose_error(self):
        scheduler = EventLoopScheduler(exit_if_empty=False)

        scheduler.dispose()

        ran = False

        def action(scheduler, state):
            nonlocal ran
            ran = True

        with pytest.raises(DisposedException):
            scheduler.schedule_periodic(0.1, action)

        assert ran is False
        assert scheduler._has_thread() is False
    def test_eventloop_schedule_periodic_dispose_error(self):
        scheduler = EventLoopScheduler(exit_if_empty=False)

        scheduler.dispose()

        ran = False

        def action(scheduler, state):
            nonlocal ran
            ran = True

        with pytest.raises(DisposedException):
            scheduler.schedule_periodic(0.1, action)

        assert ran is False
        assert scheduler._has_thread() is False
    def test_eventloop_schedule_periodic_dispose(self):
        scheduler = EventLoopScheduler(exit_if_empty=False)

        scheduler.dispose()

        ran = False

        def action(scheduler, state):
            nonlocal ran
            ran = True

        exc = None
        try:
            scheduler.schedule_periodic(0.1, scheduler.now, action)
        except Exception as e:
            exc = e
        finally:
            assert isinstance(exc, DisposedException)
            assert ran is False
            assert scheduler._has_thread() is False