def METHOD_NAME(data, ensemble, forecast):
    group = "/REAL_0/GEN_DATA"
    bf._migrate_gen_data(ensemble, forecast)
    for key in set(data[group].variables) - set(data[group].dimensions):
        expect = np.array(data[group][key]).flatten()
        actual = ensemble.load_response(key, (0,))["values"].data.flatten()
        assert list(expect) == list(actual), key