def test_combined_dataset(dataset_1, dataset_2):
"""Verify the length of the CombinedDataset."""
datasets = [dataset_1, dataset_2]
combined_dataset = CombinedDataset(datasets)
assert combined_dataset.max_len == 20
assert combined_dataset.min_len == len(combined_dataset) == 10
def test_combined_dataset_length_mode_error():
dset = CombinedDataset([range(10)])
with pytest.raises(MisconfigurationException, match="Invalid Mode"):
dset._calc_num_data([range(10)], "test")