def test_str_split_box_df(self):
        def test_impl(df):
            return pd.DataFrame({'B': df.A.str.split(',')})

        df = pd.DataFrame({'A': ['AB,CC', 'C,ABB,D']})
        hpat_func = self.jit(test_impl)
        pd.testing.assert_series_equal(
            hpat_func(df).B, test_impl(df).B, check_names=False)