How do I define async fixtures and use them in async tests?
The following code, all in the same file, fails miserably. Is the fixture called plainly by the test runner and not awaited?
@pytest.fixture
async def create_x(api_client):
x_id = await add_x(api_client)
return api_client, x_id
async def test_app(create_x, auth):
api_client, x_id = create_x
resp = await api_client.get(f'my_res/{x_id}', headers=auth)
assert resp.status == web.HTTPOk.status_code
producing
==================================== ERRORS ====================================
_____________ ERROR at setup of test_app[pyloop] ______________
api_client = <aiohttp.test_utils.TestClient object at 0x7f27ec954f60>
@pytest.fixture
async def create_x(api_client):
> x_id = await add_x(api_client)
...
... cannot show the full trace and pathnames sorry
...
in __await__
ret = yield from self._coro /home/mbb/.pyenv/versions/3.6.3/envs/mr/lib/python3.6/site-packages/aiohttp/test_utils.py:245: in request
method, self.make_url(path), *args, **kwargs /home/mbb/.pyenv/versions/mr/lib/python3.6/site-packages/aiohttp/helpers.py:104: in __iter__
ret = yield from self._coro /home/mbb/.pyenv/versions/mr/lib/python3.6/site-packages/aiohttp/client.py:221: in _request
with timer:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <aiohttp.helpers.TimerContext object at 0x7f27ec9875c0>
def __enter__(self):
task = current_task(loop=self._loop)
if task is None:
> raise RuntimeError('Timeout context manager should be used '
'inside a task') E RuntimeError: Timeout context manager should be used inside a task
/home/mbb/.pyenv/versions/mr/lib/python3.6/site-packages/aiohttp/helpers.py:717: RuntimeError
=========================== 1 error in 1.74 seconds ============================ Process finished with exit code 0
I know I could probably do
@pytest.fixture
def create_x(loop, api_client):
x_id = loop.run_until_complete(add_x(api_client))
return api_client, x_id
but I'd like to know if an easier/most elegant way exists. I cannot find a clear and simple example/explanation in the project pages of either pytest, pytest-asyncio, pytest-aiohttp.
I use Python 3.6.3, pytest 3.4.2, pytest-asyncio 0.8.0 and pytest-aiohttp 0.3.0
Many thanks for your kind help
You only need to mark your tests as async
@pytest.mark.asyncio
async def test_app(create_x, auth):
api_client, x_id = create_x
resp = await api_client.get(f'my_res/{x_id}', headers=auth)
assert resp.status == web.HTTPOk.status_code
This tells pytest to run the test inside an event loop rather than calling it directly.
The fixtures can be marked as normal
@pytest.fixture
async def create_x(api_client):
x_id = await add_x(api_client)
return api_client, x_id