Patching getfuncargnames. Adding fixtures to argnames list

I am writing plug-in for the pytest. I want to make a hook that will trigger a fixture that is not passed as an argument in test and is not specified in usefixture. I want to run it after fixture with autouse flag and in front of other fixtures. The condition for launching will be checking for the presence of a custom marker. It should look like this:

this is an abstract example

def open_fixture(autouse=True):
    open_page()

@pytest.fixture
def filling_fixture():
    filling_fields()

@pytest.fixture
def click_fixture():
    click_button()

@pytest.mark.my_marker
def test(clik_fixture):
    pass

#all three fixtures must be started in turn

I decided to change the FixtureDef class attribute and add my fixture to self.argnames. For this i wanted to make a monkey patch and wrap getfuncargnames

    def wrapper(*args, **kwargs):
        if [mark.name for mark in func.own_markers if "my_marker" in mark.name]:
            return func(*args, **kwargs).insert("filling_fixure")
    return wrapper

But I can’t fix this module. I didn’t want to understand what the problem it was, since the monkey patch is not a very good solution. I’m sure pytest has a simpler solution to my problem.

[symonk]

you can probably also load an internal plugin via pytest_plugins=[‘’]

[SalmonMode]

@vkutepov in order for a fixture to be visible to another fixture, it must be defined in the same scope, a parent scope (which considers conftest files), or installed in a plugin. Normally, common fixtures would be placed in conftest files in the appropriate place in the file structure. If you want to go the plugin route, you’ll need to make an actual installable plugin and register it with the appropriate pytest entry point. You can check out pytest-django for an example of how to do this.