test_run.py 文件源码

def test_exc_info_after_yield_error():
    child_task = None

    async def child():
        nonlocal child_task
        child_task = _core.current_task()

        try:
            raise KeyError
        except Exception:
            try:
                await sleep_forever()
            except Exception:
                pass
            raise

    with pytest.raises(KeyError):
        async with _core.open_nursery() as nursery:
            nursery.start_soon(child)
            await wait_all_tasks_blocked()
            _core.reschedule(child_task, _core.Error(ValueError()))


# Similar to previous test -- if the ValueError() gets sent in via 'throw',
# then Python's normal implicit chaining stuff is broken.