async fixtures yield async_generator instead of the object yielded

[vaharoni]

Here's a python test file that I'd expect to pass:

import pytest
from collections.abc import AsyncGenerator

@pytest.fixture()
async def fixture() -> AsyncGenerator[str, None]:
    yield "a"

@pytest.mark.asyncio
async def test(fixture: str):
    assert fixture == "a"

However, it does not pass due to the error: AssertionError: assert <async_generator object fixture at 0x104723740> == 'a'

I'm using:

pytest==8.2.1
pytest-asyncio==0.23.7

Repo to reproduce can be found here.

Full output of pytest -v test.py:

============================================================================== test session starts ==============================================================================
platform darwin -- Python 3.11.2, pytest-8.0.0, pluggy-1.4.0 -- /Users/REDACTED/.pyenv/versions/3.11.2/bin/python3.11
cachedir: .pytest_cache
rootdir: /Users/REDACTED/workspace/pytest-asyncio-issue
plugins: asyncio-0.23.5, xdist-3.5.0, anyio-3.6.2
asyncio: mode=Mode.STRICT
collected 1 item                                                                                                                                                                

test.py::test FAILED                                                                                                                                                      [100%]

=================================================================================== FAILURES ====================================================================================
_____________________________________________________________________________________ test ______________________________________________________________________________________

fixture = <async_generator object fixture at 0x104723740>

    @pytest.mark.asyncio
    async def test(fixture: str):
>       assert fixture == "a"
E       AssertionError: assert <async_generator object fixture at 0x104723740> == 'a'

test.py:10: AssertionError
============================================================================ short test summary info ============================================================================
FAILED test.py::test - AssertionError: assert <async_generator object fixture at 0x104723740> == 'a'
=============================================================================== 1 failed in 0.07s ===============================================================================

[vaharoni]

Ah, my bad. The correct code should use @pytest_asyncio.fixture rather than @pytest.fixture:

import pytest
import pytest_asyncio
from collections.abc import AsyncGenerator

@pytest_asyncio.fixture()
async def fixture() -> AsyncGenerator[str, None]:
    yield "a"

@pytest.mark.asyncio
async def test(fixture: str):
    assert fixture == "a"