def METHOD_NAME(self, mock_repo, params):
    r = mock_repo(**params)
    r._delete_all()
    for i in range(5):
        m = MockObj(f"uuid-{i}", f"Foo{i}")
        r._save(m)
    _models = r._load_all()
    assert len(_models) == 5
    r._delete_many(["uuid-0", "uuid-1"])
    _models = r._load_all()
    assert len(_models) == 3