Method test_invalid_start_byte

Lib/test/test_str.py:2045–2056

Test that an 'invalid start byte' error is raised when the first byte is not in the ASCII range or is not a valid start byte of a 2-, 3-, or 4-bytes sequence. The invalid start byte is replaced with a single U+FFFD when errors='replace'. E.g. <80> is a contin

(self)

                          'aaaa' + res + 'bbbb')

    def test_invalid_start_byte(self):
        """
        Test that an 'invalid start byte' error is raised when the first byte
        is not in the ASCII range or is not a valid start byte of a 2-, 3-, or
        4-bytes sequence. The invalid start byte is replaced with a single
        U+FFFD when errors='replace'.
        E.g. <80> is a continuation byte and can appear only after a start byte.
        """
        FFFD = '\ufffd'
        for byte in b'\x80\xA0\x9F\xBF\xC0\xC1\xF5\xFF':
            self.assertCorrectUTF8Decoding(bytes([byte]), '\ufffd',
                                           'invalid start byte')

    def test_unexpected_end_of_data(self):
        """