Function test_grow_policy_fails

catboost/python-package/ut/medium/test.py:7681–7708

(task_type, grow_policy)

@pytest.mark.parametrize('grow_policy', NONSYMMETRIC)
def test_grow_policy_fails(task_type, grow_policy):
    train_pool = Pool(TRAIN_FILE, column_description=CD_FILE)
    test_pool = Pool(TEST_FILE, column_description=CD_FILE)
    args = {
        'iterations': 30,
        'loss_function': 'Logloss',
        'use_best_model': False,
        'learning_rate': 0.3,
        'grow_policy': grow_policy,
        'boosting_type': 'Plain',
        'task_type': task_type,
        'gpu_ram_part': TEST_GPU_RAM_PART,
        'devices': '0'
    }
    model = CatBoostClassifier(**args)

    model.fit(train_pool)

    with pytest.raises(CatBoostError):
        model.shrink(9)
    with pytest.raises(CatBoostError):
        model.get_object_importance(test_pool, train_pool)

    model_output = test_output_path('model')
    for format in ['AppleCoreML', 'cpp', 'python', 'onnx']:
        with pytest.raises(CatBoostError):
            model.save_model(model_output, format=format)
    _ = sum_models([model, model.copy()])


@pytest.mark.parametrize('grow_policy', NONSYMMETRIC)