test_timeout.py 文件源码

def test_timeout_remaining(loop):
    with timeout(None, loop=loop) as cm:
        assert cm.remaining is None

    t = timeout(1.0, loop=loop)
    assert t.remaining is None

    with timeout(1.0, loop=loop) as cm:
        yield from asyncio.sleep(0.1, loop=loop)
        assert cm.remaining < 1.0

    with pytest.raises(asyncio.TimeoutError):
        with timeout(0.1, loop=loop) as cm:
            yield from asyncio.sleep(0.5, loop=loop)

    assert cm.remaining == 0.0