Method test_symbolic_refs_errors

Lib/test/test_re.py:343–378

(self)

        self.assertEqual(re.sub(pat, r'\g<200>', 'xc8yzxc8y'), 'c8zc8')

    def test_symbolic_refs_errors(self):
        self.checkTemplateError('(?P<a>x)', r'\g<a', 'xx',
                                'missing >, unterminated name', 3)
        self.checkTemplateError('(?P<a>x)', r'\g<', 'xx',
                                'missing group name', 3)
        self.checkTemplateError('(?P<a>x)', r'\g', 'xx', 'missing <', 2)
        self.checkTemplateError('(?P<a>x)', r'\g<a a>', 'xx',
                                "bad character in group name 'a a'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<>', 'xx',
                                'missing group name', 3)
        self.checkTemplateError('(?P<a>x)', r'\g<1a1>', 'xx',
                                "bad character in group name '1a1'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<2>', 'xx',
                                'invalid group reference 2', 3)
        self.checkTemplateError('(?P<a>x)', r'\2', 'xx',
                                'invalid group reference 2', 1)
        with self.assertRaisesRegex(IndexError, "unknown group name 'ab'"):
            re.sub('(?P<a>x)', r'\g<ab>', 'xx')
        self.checkTemplateError('(?P<a>x)', r'\g<-1>', 'xx',
                                "bad character in group name '-1'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<+1>', 'xx',
                                "bad character in group name '+1'", 3)
        self.checkTemplateError('()'*10, r'\g<1_0>', 'xx',
                                "bad character in group name '1_0'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g< 1 >', 'xx',
                                "bad character in group name ' 1 '", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<©>', 'xx',
                                "bad character in group name '©'", 3)
        self.checkTemplateError(b'(?P<a>x)', b'\\g<\xc2\xb5>', b'xx',
                                r"bad character in group name '\xc2\xb5'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<㊀>', 'xx',
                                "bad character in group name '㊀'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<¹>', 'xx',
                                "bad character in group name '¹'", 3)
        self.checkTemplateError('(?P<a>x)', r'\g<१>', 'xx',
                                "bad character in group name '१'", 3)

    def test_re_subn(self):
        self.assertEqual(re.subn("(?i)b+", "x", "bbbb BBBB"), ('x x', 2))