def METHOD_NAME(self):
    """Test the output of the ClearMetadataPreprocessor"""
    nb = self.build_notebook()
    res = self.build_resources()
    preprocessor = self.build_preprocessor(
        clear_cell_metadata=False, preserve_nb_metadata_mask=set()
    )
    nb, res = preprocessor(nb, res)
    assert nb.cells[0].metadata
    assert not nb.metadata