def METHOD_NAME(mock_alembic, mock_database):
    mock_database(current_revision=Constants.unknown_revision)
    alembic_util = mlrun.api.utils.db.alembic.AlembicUtil(pathlib.Path(""))
    alembic_util.init_alembic()
    assert mock_alembic.stamp_calls == []
    assert mock_alembic.upgrade_calls == ["head"]