Method test_decode_warnings

Lib/test/test_codecs.py:2684–2715

(self)

        check(br"\U0001d120", "\U0001d120")

    def test_decode_warnings(self):
        decode = codecs.unicode_escape_decode
        check = coding_checker(self, decode)
        for i in range(97, 123):
            b = bytes([i])
            if b not in b'abfnrtuvx':
                with self.assertWarnsRegex(DeprecationWarning,
                        r'"\\%c" is an invalid escape sequence' % i):
                    check(b"\\" + b, "\\" + chr(i))
            if b.upper() not in b'UN':
                with self.assertWarnsRegex(DeprecationWarning,
                        r'"\\%c" is an invalid escape sequence' % (i-32)):
                    check(b"\\" + b.upper(), "\\" + chr(i-32))
        with self.assertWarnsRegex(DeprecationWarning,
                r'"\\8" is an invalid escape sequence'):
            check(br"\8", "\\8")
        with self.assertWarns(DeprecationWarning):
            check(br"\9", "\\9")
        with self.assertWarnsRegex(DeprecationWarning,
                r'"\\\xfa" is an invalid escape sequence') as cm:
            check(b"\\\xfa", "\\\xfa")
        for i in range(0o400, 0o1000):
            with self.assertWarnsRegex(DeprecationWarning,
                    r'"\\%o" is an invalid octal escape sequence' % i):
                check(rb'\%o' % i, chr(i))

        with self.assertWarnsRegex(DeprecationWarning,
                r'"\\z" is an invalid escape sequence'):
            self.assertEqual(decode(br'\x\z', 'ignore'), ('\\z', 4))
        with self.assertWarnsRegex(DeprecationWarning,
                r'"\\501" is an invalid octal escape sequence'):
            self.assertEqual(decode(br'\x\501', 'ignore'), ('\u0141', 6))

    def test_decode_errors(self):
        decode = codecs.unicode_escape_decode