Files reproducing a bug in `pytest-asyncio`

README.txt

This Gist contains files reproducing a bug in `pytest-asyncio` that appears
when testing an aiohttp application. The bug is a regression. The last good
version is 0.12.0, the first bad version is 0.14.0 (it looks like there is no
0.13.0).

Without the bug:

```console
$ pip3 install -r requirements-0.12.0.txt
$ pytest > pytest-output-0.12.0.txt

With the bug:

```console
$ pip3 install -r requirements-0.14.0.txt
$ pytest > pytest-output-0.14.0.txt
```

pytest-output-0.12.0.txt

============================= test session starts ==============================
platform darwin -- Python 3.8.5, pytest-6.0.1, py-1.9.0, pluggy-0.13.1
rootdir: /Users/dmajda/tmp/pytest-asyncio-test
plugins: asyncio-0.12.0, aiohttp-0.3.0
collected 1 item

test_app.py .                                                            [100%]

=============================== warnings summary ===============================
test_app.py::test_ping[pyloop]
  /Users/dmajda/tmp/pytest-asyncio-test/.venv/lib/python3.8/site-packages/aiohttp/connector.py:964: DeprecationWarning: The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.
    hosts = await asyncio.shield(self._resolve_host(

-- Docs: https://docs.pytest.org/en/stable/warnings.html
========================= 1 passed, 1 warning in 0.04s =========================

pytest-output-0.14.0.txt

============================= test session starts ==============================
platform darwin -- Python 3.8.5, pytest-6.0.1, py-1.9.0, pluggy-0.13.1
rootdir: /Users/dmajda/tmp/pytest-asyncio-test
plugins: aiohttp-0.3.0, asyncio-0.14.0
collected 1 item

test_app.py F                                                            [100%]

=================================== FAILURES ===================================
______________________________ test_ping[pyloop] _______________________________

aiohttp_client = <function aiohttp_client.<locals>.go at 0x10ddf6af0>

    @pytest.mark.asyncio
    async def test_ping(aiohttp_client):
        async def handle_ping(request):
            return web.Response(text='pong')
    
        app = web.Application()
        app.router.add_get('/ping', handle_ping)
    
        client = await aiohttp_client(app)
>       response = await client.get('/ping')

test_app.py:14: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
.venv/lib/python3.8/site-packages/aiohttp/test_utils.py:291: in _request
    resp = await self._session.request(
.venv/lib/python3.8/site-packages/aiohttp/client.py:426: in _request
    with timer:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <aiohttp.helpers.TimerContext object at 0x10de0fc70>

    def __enter__(self) -> BaseTimerContext:
        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

.venv/lib/python3.8/site-packages/aiohttp/helpers.py:579: RuntimeError
=============================== warnings summary ===============================
test_app.py::test_ping[pyloop]
  /Users/dmajda/tmp/pytest-asyncio-test/.venv/lib/python3.8/site-packages/aiohttp/cookiejar.py:55: DeprecationWarning: The object should be created from async function
    super().__init__(loop=loop)

test_app.py::test_ping[pyloop]
  /Users/dmajda/tmp/pytest-asyncio-test/.venv/lib/python3.8/site-packages/aiohttp/test_utils.py:249: DeprecationWarning: The object should be created from async function
    self._session = ClientSession(loop=loop,

test_app.py::test_ping[pyloop]
  /Users/dmajda/tmp/pytest-asyncio-test/.venv/lib/python3.8/site-packages/aiohttp/connector.py:727: DeprecationWarning: The object should be created from async function
    super().__init__(keepalive_timeout=keepalive_timeout,

test_app.py::test_ping[pyloop]
  /Users/dmajda/tmp/pytest-asyncio-test/.venv/lib/python3.8/site-packages/aiohttp/connector.py:736: DeprecationWarning: The object should be created from async function
    resolver = DefaultResolver(loop=self._loop)

test_app.py::test_ping[pyloop]
  /Users/dmajda/tmp/pytest-asyncio-test/.venv/lib/python3.8/site-packages/aiohttp/web_server.py:53: DeprecationWarning: The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.
    await asyncio.gather(*coros, loop=self._loop)

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
FAILED test_app.py::test_ping[pyloop] - RuntimeError: Timeout context manager...
======================== 1 failed, 5 warnings in 0.18s =========================

requirements-0.12.0.txt

aiohttp==3.6.2
pytest==6.0.1
pytest-aiohttp==0.3.0
pytest-asyncio==0.12.0

requirements-0.14.0.txt

aiohttp==3.6.2
pytest==6.0.1
pytest-aiohttp==0.3.0
pytest-asyncio==0.14.0

test_app.py

import pytest
from aiohttp import web


@pytest.mark.asyncio
async def test_ping(aiohttp_client):
    async def handle_ping(request):
        return web.Response(text='pong')

    app = web.Application()
    app.router.add_get('/ping', handle_ping)

    client = await aiohttp_client(app)
    response = await client.get('/ping')

    assert response.status == 200
    assert await response.text() == 'pong'