pickletester.py 文件源码

def test_huge_str_32b(self, size):
        data = "abcd" * (size // 4)
        try:
            for proto in protocols:
                if proto == 0:
                    continue
                with self.subTest(proto=proto):
                    try:
                        pickled = self.dumps(data, protocol=proto)
                        header = (pickle.BINUNICODE +
                                  struct.pack("<I", len(data)))
                        data_start = pickled.index(b'abcd')
                        self.assertEqual(
                            header,
                            pickled[data_start-len(header):data_start])
                        self.assertEqual((pickled.rindex(b"abcd") + len(b"abcd") -
                                          pickled.index(b"abcd")), len(data))
                    finally:
                        pickled = None
        finally:
            data = None

    # BINUNICODE (protocols 1, 2 and 3) cannot carry more than 2**32 - 1 bytes
    # of utf-8 encoded unicode. BINUNICODE8 (protocol 4) supports these huge
    # unicode strings however.