def test_str_split(self):
        def test_impl(df):
            return df.A.str.split(',')

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