Method checkTemplateError

Lib/test/test_re.py:57–64

(self, pattern, repl, string, errmsg, pos=None)

                self.assertEqual(err.pos, pos)

    def checkTemplateError(self, pattern, repl, string, errmsg, pos=None):
        with self.assertRaises(re.PatternError) as cm:
            re.sub(pattern, repl, string)
        with self.subTest(pattern=pattern, repl=repl):
            err = cm.exception
            self.assertEqual(err.msg, errmsg)
            if pos is not None:
                self.assertEqual(err.pos, pos)

    def test_error_is_PatternError_alias(self):
        assert re.error is re.PatternError