ioloop_test.py 文件源码

def test_overrun(self):
        sleep_durations = [9, 9, 10, 11, 20, 20, 35, 35, 0, 0]
        expected = [
            1010, 1020, 1030,  # first 3 calls on schedule
            1050, 1070,  # next 2 delayed one cycle
            1100, 1130,  # next 2 delayed 2 cycles
            1170, 1210,  # next 2 delayed 3 cycles
            1220, 1230,  # then back on schedule.
        ]
        calls = []

        def cb():
            calls.append(self.io_loop.time())
            if not sleep_durations:
                self.io_loop.stop()
                return
            self.io_loop.sleep(sleep_durations.pop(0))
        pc = PeriodicCallback(cb, 10000)
        pc.start()
        self.io_loop.start()
        self.assertEqual(calls, expected)