Method _inject_setup_method_fixture

src/_pytest/python.py:853–890

Inject a hidden autouse, function scoped fixture into the collected class object that invokes setup_method/teardown_method if either or both are available. Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with other fixtures (#517).

(self)

        self.obj.__pytest_setup_class = xunit_setup_class_fixture

    def _inject_setup_method_fixture(self) -> None:
        """Inject a hidden autouse, function scoped fixture into the collected class object
        that invokes setup_method/teardown_method if either or both are available.

        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
        other fixtures (#517).
        """
        has_nose = self.config.pluginmanager.has_plugin("nose")
        setup_name = "setup_method"
        setup_method = _get_first_non_fixture_func(self.obj, (setup_name,))
        if setup_method is None and has_nose:
            setup_name = "setup"
            setup_method = _get_first_non_fixture_func(self.obj, (setup_name,))
        teardown_name = "teardown_method"
        teardown_method = getattr(self.obj, teardown_name, None)
        if teardown_method is None and has_nose:
            teardown_name = "teardown"
            teardown_method = getattr(self.obj, teardown_name, None)
        if setup_method is None and teardown_method is None:
            return

        @fixtures.fixture(
            autouse=True,
            scope="function",
            # Use a unique name to speed up lookup.
            name=f"_xunit_setup_method_fixture_{self.obj.__qualname__}",
        )
        def xunit_setup_method_fixture(self, request) -> Generator[None, None, None]:
            method = request.function
            if setup_method is not None:
                func = getattr(self, setup_name)
                _call_with_optional_argument(func, method)
            yield
            if teardown_method is not None:
                func = getattr(self, teardown_name)
                _call_with_optional_argument(func, method)

        self.obj.__pytest_setup_method = xunit_setup_method_fixture


class InstanceDummy: