Incompatible with pytest-randomly when using doctest tests

[icemac]

When using gocept.pytestlayer together with pytest-randomly an INTERNALERROR occurs because: 'DocFileCase' object has no attribute '__qualname__'.

================================================ test session starts =================================================
platform linux -- Python 3.9.14, pytest-7.1.3, pluggy-1.0.0
Using --randomly-seed=2349767981
rootdir: /.../my-project, configfile: pytest.ini
plugins: gocept.pytestlayer-8.1, cov-4.0.0, instafail-0.4.2, randomly-3.12.0, rerunfailures-10.2, remove-stale-bytecode-5.0.1, requests-mock-1.10.0
collected 1 item                                                                                                     
INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/.../pytest-7.1.3-py3.9.egg/_pytest/main.py", line 268, in wrap_session
INTERNALERROR>     session.exitstatus = doit(config, session) or 0
INTERNALERROR>   File "/.../pytest-7.1.3-py3.9.egg/_pytest/main.py", line 321, in _main
INTERNALERROR>     config.hook.pytest_collection(session=session)
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_hooks.py", line 265, in __call__
INTERNALERROR>     return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_manager.py", line 80, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_callers.py", line 60, in _multicall
INTERNALERROR>     return outcome.get_result()
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_result.py", line 60, in get_result
INTERNALERROR>     raise ex[1].with_traceback(ex[2])
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_callers.py", line 39, in _multicall
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/.../pytest-7.1.3-py3.9.egg/_pytest/main.py", line 332, in pytest_collection
INTERNALERROR>     session.perform_collect()
INTERNALERROR>   File "/.../pytest-7.1.3-py3.9.egg/_pytest/main.py", line 660, in perform_collect
INTERNALERROR>     hook.pytest_collection_modifyitems(
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_hooks.py", line 265, in __call__
INTERNALERROR>     return self._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_manager.py", line 80, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_callers.py", line 60, in _multicall
INTERNALERROR>     return outcome.get_result()
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_result.py", line 60, in get_result
INTERNALERROR>     raise ex[1].with_traceback(ex[2])
INTERNALERROR>   File "/.../pluggy-1.0.0-py3.9.egg/pluggy/_callers.py", line 39, in _multicall
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/.../pytest_randomly-3.12.0-py3.9.egg/pytest_randomly/__init__.py", line 219, in pytest_collection_modifyitems
INTERNALERROR>     _shuffle_by_class(list(group), seed),
INTERNALERROR>   File "/.../pytest_randomly-3.12.0-py3.9.egg/pytest_randomly/__init__.py", line 258, in _shuffle_by_class
INTERNALERROR>     klasses_items.sort(key=_cls_key)
INTERNALERROR>   File "/.../pytest_randomly-3.12.0-py3.9.egg/pytest_randomly/__init__.py", line 256, in _cls_key
INTERNALERROR>     return _md5(f"{seed}::{klass.__module__}.{klass.__qualname__}")
INTERNALERROR> AttributeError: 'DocFileCase' object has no attribute '__qualname__'

Versions:

• gocept.pytestlayer 8.1
• pytest-randomly 3.12
• pytest 7.1.3
• Python 3.9.14