Method getfixturevalue

src/_pytest/fixtures.py:580–593

Dynamically run a named fixture function. Declaring fixtures via function argument is recommended where possible. But if you can only decide whether to use another fixture at test setup time, you may use this function to retrieve it inside a fixture or test function

(self, argname: str)

                item.funcargs[argname] = self.getfixturevalue(argname)

    def getfixturevalue(self, argname: str) -> Any:
        """Dynamically run a named fixture function.

        Declaring fixtures via function argument is recommended where possible.
        But if you can only decide whether to use another fixture at test
        setup time, you may use this function to retrieve it inside a fixture
        or test function body.

        :raises pytest.FixtureLookupError:
            If the given fixture could not be found.
        """
        fixturedef = self._get_active_fixturedef(argname)
        assert fixturedef.cached_result is not None
        return fixturedef.cached_result[0]

    def _get_active_fixturedef(
        self, argname: str