import pytest


class noop:
    def __await__(self):
        yield


async def agen(raised):
    try:
        yield 1
    finally:
        try:
            await noop()
        except Exception as exc:
            raised.append(exc)


def test_bug():
    raised = []
    g = agen(raised)

    # Run g.__anext__
    coro = g.__anext__()
    with pytest.raises(StopIteration) as record:
        coro.send(None)
    assert record.value.value == 1

    # Run g.__aclose__ up to noop()
    coro = g.aclose()
    assert coro.send(None) is None

    # Thow a runtime error into agen
    exc = RuntimeError()
    with pytest.raises(StopIteration) as record:
        coro.throw(exc)
    assert record.value.value is None
    assert raised[0] is exc