swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7f45345dcc50> def test_snapshot_resolve_alias_dangling_branch(swh_storage): dangling_branch_name = b"dangling_branch" alias_name = b"rev_alias" alias_branch = SnapshotBranch( target=dangling_branch_name, target_type=TargetType.ALIAS ) snapshot = Snapshot( branches={dangling_branch_name: None, alias_name: alias_branch,} ) > swh_storage.snapshot_add([snapshot]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/algos/test_snapshot.py:355: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.storage.in_memory.InMemoryStorage object at 0x7f45345dcc50> snapshots = [Snapshot(branches=ImmutableDict({b'dangling_branch': None, b'rev_alias': SnapshotBranch(target=b'dangling_branch', target_type=<TargetType.ALIAS: 'alias'>)}), id=b'\\\x81\xc2\x7f\x00"gKR.\x80\xc9\xba \xf1)2\x9b&\xbd')] def snapshot_add(self, snapshots: List[Snapshot]) -> Dict: > if not self._allow_overwrite: E AttributeError: 'InMemoryStorage' object has no attribute '_allow_overwrite' .tox/py3/lib/python3.7/site-packages/swh/storage/cassandra/storage.py:668: AttributeError