TODO: add more tests

CP_UTF8:

        if self.vista_or_later:
            tests.append(('\udc80', 'strict', None))
            tests.append(('\udc80', 'ignore', b''))
            tests.append(('\udc80', 'replace', b'\xef\xbf\xbd'))
        else:
            tests.append(('\udc80', 'strict', b'\xed\xb2\x80'))

cp1252:

            ('\u0141', 'strict', None),
            ('\u0141', 'ignore', b''),
            ('\u0141', 'replace', b'L'),