Add possibility to pass parameter to the fixture from another fixture

See original GitHub issue

Could you please implement possibility to pass parameter from one fixture to the parent one? I have a complex fixture hierarchy in my test framework. I have some cases when i really need to have this feature.

Example:

@pytest.fixture(scope='session')
def fixture_1(request):
    return request.param

@pytest.fixture
def fixture_2(fixture_1): # Need to pass parameter here to fixture_1
    print (fixture_1)

So far I can pass parameter to the fixture from test using:

@pytest.mark.parametrize('fixture_1', ['parameter'], indirect=True)
def test_1(fixture_1):
     print (fixture_1)

Need to have exactly the same thing from fixture.

Thank you!

Issue Analytics

State:
Created 7 years ago
Reactions:8
Comments:12 (7 by maintainers)

Top GitHub Comments

1reaction

nchammascommented, Jul 5, 2018

@sathishaMovvar - You pinged me but I think you meant to ping @nicoddemus instead.

1reaction

Sathisha-Movvar-Bosecommented, Jul 5, 2018

@nchammas thanks for the suggestion, but this still doesn’t solve my problem. the lazy fixture returns an object with only one value for parametrize. I want to use a list of values from the fixture which is used as params in the test.

below code work with lazy fixture but that’s not what I want.


@pytest.fixture(scope="class", params=[2,4,8])
def values(request):
    return request.param

@pytest.mark.parametrize('n_iter', [pytest.lazy_fixture("values")])
class Test_Class1:

instead I want something like below:

@pytest.fixture(scope="class")
def values(request):
    return [2,4,6]

@pytest.mark.parametrize('n_iter', pytest.lazy_fixture("values"))
class Test_Class1:

in which I get error “TypeError: ‘LazyFixture’ object is not iterable”. I found an open question in StackOverflolw similar to my scenario -https://stackoverflow.com/questions/50482416/use-pytest-lazy-fixture-list-values-as-parameters-in-another-fixture