self = <swh.storage.tests.test_cassandra.TestCassandraStorage object at 0x7f7710144eb8> swh_storage_backend_config = {'cls': 'cassandra', 'hosts': ['127.0.0.1'], 'journal_writer': {'cls': 'memory'}, 'keyspace': 'db77e4b04ab0f0136d49', ...} def test_types(self, swh_storage_backend_config): """Checks all methods of StorageInterface 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("_", (StorageInterface,), {})() storage = get_storage(**swh_storage_backend_config) assert "content_add" 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(storage, 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: origin_get_by_sha1 E assert <Signature (s...], NoneType]]> == <Signature (sha1s)> E +<Signature (sha1s: List[bytes]) -> Iterable[Union[Dict[str, Any], NoneType]]> E -<Signature (sha1s)> .tox/py3/lib/python3.7/site-packages/swh/storage/tests/test_storage.py:169: AssertionError