Method test_incremental_errors

Lib/test/test_codecs.py:906–921

(self)

            b"abc\xed\xa0z".decode(self.encoding, "surrogatepass")

    def test_incremental_errors(self):
        # Test that the incremental decoder can fail with final=False.
        # See issue #24214
        cases = [b'\x80', b'\xBF', b'\xC0', b'\xC1', b'\xF5', b'\xF6', b'\xFF']
        for prefix in (b'\xC2', b'\xDF', b'\xE0', b'\xE0\xA0', b'\xEF',
                       b'\xEF\xBF', b'\xF0', b'\xF0\x90', b'\xF0\x90\x80',
                       b'\xF4', b'\xF4\x8F', b'\xF4\x8F\xBF'):
            for suffix in b'\x7F', b'\xC0':
                cases.append(prefix + suffix)
        cases.extend((b'\xE0\x80', b'\xE0\x9F', b'\xED\xA0\x80',
                      b'\xED\xBF\xBF', b'\xF0\x80', b'\xF0\x8F', b'\xF4\x90'))

        for data in cases:
            with self.subTest(data=data):
                dec = codecs.getincrementaldecoder(self.encoding)()
                self.assertRaises(UnicodeDecodeError, dec.decode, data)


class UTF7Test(ReadTest, unittest.TestCase):