[Python] Can I parameterize a pytest fixture with other fixtures?

I have a python test that uses a fixture for credentials (a tuple of userid and password)

def test_something(credentials)
(userid, password) = credentials
print("Hello {0}, welcome to my test".format(userid))


and I have pytest fixture for credentials:

@pytest.fixture()
def credentials():
return ("my_userid", "my_password")


It works great

Now I want to extend this for multiple credentials (say staging and production) so that my test will run twice (once each for staging and production).

I thought that parameterization was the answer, but it seems I can't parameterize with fixtures.

I would love to do something like this:

@pytest.fixture(params=[staging_credentials, production_credentials])
def credentials(request):
return request.param


where staging_credentials and production_credentials are all fixtures:

@pytest.fixture()
def staging_credentials():
return ("staging_userid", "staging_password")

@pytest.fixture()
def production_credentials():
return ("prod_userid", "prod_password")


but apparently parameters to the fixture can't be other fixtures.

Any suggestions on how to elegantly handle this? I've looked at https://docs.pytest.org/en/latest/proposals/parametrize_with_fixtures.html but that seems a but too brute force.

Thanks! Steve

Continue reading...