@pytest.mark.parametrize('input_cell, expected_cell', [(raw_cell, raw_cell), (code_cell, code_cell), (markdown_cell, expected_markdown_cell)])
def test_preprocess_cell(preprocessor, input_cell, expected_cell):
    assert (preprocessor.preprocess_cell(input_cell, None, None) == (expected_cell, None))
@pytest.mark.parametrize('input_cell, expected_cell', [(raw_cell, raw_cell), (code_cell, code_cell), (markdown_cell, expected_markdown_cell)])
def test_preprocess_cell(preprocessor, input_cell, expected_cell):
    assert (preprocessor.preprocess_cell(input_cell, None, None) == (expected_cell, None))