def METHOD_NAME(poly_case):
    facade = LibresFacade(poly_case)
    args = Namespace(realizations="0-4,7,8")
    ensemble_size = facade.get_ensemble_size()
    active_mask = [False] * ensemble_size
    active_mask[0] = True
    active_mask[1] = True
    active_mask[2] = True
    active_mask[3] = True
    active_mask[4] = True
    active_mask[7] = True
    active_mask[8] = True
    assert model_factory._realizations(args, ensemble_size) == active_mask