Parametrize depending on prior fixture value

[ego-thales]

Hello there,

Let's say I have

A_VALUES = [1, 2]

@pytest.fixture(params=A_VALUES)
def a(request) -> int:
    return request.param

and now I want to define a fixture b that would take all values in range(a) in my tests. Obviously, I cannot do

@pytest.fixture(params=range(a))  # Not allowed
def b(request) -> int:
    return request.param

but is ther something I can do to achieve the desired result?

I tried looking at metafunc and pytest_generate_tests but did not manage to get what I wanted. I also look in these tutorials, but could not find what I wanted (may be there, but I could not understand it if so).

Thanks for your help!
Élie

[RonnyPfannschmidt]

Parameterize happens before fixtures

Currently fixtures cannot be used as input for Parameterize

A workaround would be a pytest plugin which creates the instances and implemets generate tests plus cleanup

[ego-thales]

Okay, I will work without it then, thanks!

Feel free to close the discussion if appropriate.

All the best.