self = <swh.scheduler.tests.test_scheduler.TestScheduler object at 0x7f065c7759b0> swh_scheduler = <swh.scheduler.backend.SchedulerBackend object at 0x7f065c75feb8> def test_interface(self, swh_scheduler): """Checks all methods of SchedulerInterface are implemented by this backend, and that they have the same signature.""" # Create an instance of the protocol (which cannot be instantiated # directly, so this creates a subclass, then instantiates it) interface = type("_", (SchedulerInterface,), {})() assert "create_task_type" in dir(interface) missing_methods = [] for meth_name in dir(interface): if meth_name.startswith("_"): continue interface_meth = getattr(interface, meth_name) try: concrete_meth = getattr(swh_scheduler, meth_name) except AttributeError: if not getattr(interface_meth, "deprecated_endpoint", False): # The backend is missing a (non-deprecated) endpoint missing_methods.append(meth_name) continue expected_signature = inspect.signature(interface_meth) actual_signature = inspect.signature(concrete_meth) > assert expected_signature == actual_signature, meth_name E AssertionError: grab_ready_priority_tasks E assert <Signature (t...-> List[Dict]> == <Signature (t...Type] = None)> E +<Signature (task_type: str, timestamp: Union[datetime.datetime, NoneType] = None, num_tasks: Union[int, NoneType] = None) -> List[Dict]> E -<Signature (task_type: str, timestamp: Union[datetime.datetime, NoneType] = None, num_tasks: Union[int, NoneType] = None)> .tox/py3/lib/python3.7/site-packages/swh/scheduler/tests/test_scheduler.py:76: AssertionError