def METHOD_NAME(self, eli5_examples, eli5_preprocessor):
    eval_examples, eval_features = eli5_preprocessor.process_eval(eli5_examples)
    assert isinstance(eval_examples, Dataset)
    assert isinstance(eval_features, Dataset)
    assert len(eval_features['input_ids']) == 1
    assert len(eval_features['labels']) == 1
    assert len(eval_features['attention_mask']) == 1
    for example in eval_features:
        assert len(example['input_ids']) == 