Method test_nested_argument_group

Lib/test/test_argparse.py:3119–3124

(self)

        self.assertEqual(cm.filename, __file__)

    def test_nested_argument_group(self):
        parser = argparse.ArgumentParser()
        g = parser.add_argument_group()
        self.assertRaisesRegex(ValueError,
                                 'argument groups cannot be nested',
                                 g.add_argument_group)

# ===================
# Parent parser tests