test_timeout.py 文件源码

def test_timeout_time(loop):
    foo_running = None

    start = loop.time()
    with pytest.raises(asyncio.TimeoutError):
        with timeout(0.1, loop=loop):
            foo_running = True
            try:
                yield from asyncio.sleep(0.2, loop=loop)
            finally:
                foo_running = False

    dt = loop.time() - start
    if not (0.09 < dt < 0.11) and os.environ.get('APPVEYOR'):
        pytest.xfail('appveyor sometimes is toooo sloooow')
    assert 0.09 < dt < 0.11
    assert not foo_running