Method collect

src/_pytest/python.py:757–786

(self)

        return self.obj()

    def collect(self) -> Iterable[nodes.Item | nodes.Collector]:
        if not safe_getattr(self.obj, class="st">"__test__", True):
            return []
        if hasinit(self.obj):
            assert self.parent is not None
            self.warn(
                PytestCollectionWarning(
                    fclass="st">"cannot collect test class {self.obj.__name__!r} because it has a "
                    fclass="st">"__init__ constructor (from: {self.parent.nodeid})"
                )
            )
            return []
        elif hasnew(self.obj):
            assert self.parent is not None
            self.warn(
                PytestCollectionWarning(
                    fclass="st">"cannot collect test class {self.obj.__name__!r} because it has a "
                    fclass="st">"__new__ constructor (from: {self.parent.nodeid})"
                )
            )
            return []

        self._register_setup_class_fixture()
        self._register_setup_method_fixture()

        self.session._fixturemanager.parsefactories(
            holder=self.newinstance(), node=self
        )

        return super().collect()

    def _register_setup_class_fixture(self) -> None:
        class="st">"""Register an autouse, class scoped fixture into the collected class object