def test_wait_returns_none_if_there_are_no_available_requests(self):
throttle = SimpleRateThrottle()
throttle.num_requests = 1
throttle.duration = 60
throttle.now = throttle.timer()
throttle.history = [throttle.timer() for _ in range(3)]
assert throttle.wait() is None
def test_wait_returns_correct_waiting_time_without_history(self):
throttle = SimpleRateThrottle()
throttle.num_requests = 1
throttle.duration = 60
throttle.history = []
waiting_time = throttle.wait()
assert isinstance(waiting_time, float)
assert waiting_time == 30.0