Concurrent async fixture setup / teardown

[dimaqq]

This is more an idea / question how hard it would be.

While pytest ensures stable fixture order, it's made with synchronous fixtures in mind.

pytest-asyncio on the other hand allows for async fixtures and typically async test cases imply async code under test which implies async dependencies which imply async fixtures.

Thus, how about running setup and teardown asynchronously too, for example:

@pytest.fixture
async def A():
    ...
    yield
    ...

@pytest.fixture
async def B(A):
    ...
    yield
    ...

@pytest.fixture
async def C(A):
    ...
    yield
    ...

@pytest.fixture
async def D(B, C):
    ...
    yield
    ...

Would run as:

• A setup
• asyncio.gather(B setup, C setup)
• D setup
• test case
• D teardown
• asyncio.gather(B teardown, C teardown)
• A teardown

[seifertm]

@dimaqq I know this issue is specifically about the fixture setup. #69 is about running tests asynchronously.

Would it be acceptable for you to close this issue in favour of #69?

[dimaqq]

I think you can decide that @seifertm