def METHOD_NAME(self):
    chunks = [2500, 240, 200]
    cf_var = self._make(chunks)
    lazy_data = _get_cf_var_data(cf_var, self.filename)
    lazy_data_chunks = [c[0] for c in lazy_data.chunks]
    expected_chunks = _optimum_chunksize(chunks, self.shape)
    self.assertArrayEqual(lazy_data_chunks, expected_chunks)