#NOTE: maintain 2.6,2.7, 3.1-3.3 compatibility in a single source
import sys
import unittest
from pickle import dumps, loads

try:
    xrange = xrange
except NameError:
    xrange = range  # Py3k


class TestCase(unittest.TestCase):
    def setUp(self):
        self.n = sys.maxsize
        self.r = xrange(self.n)

    def test_len(self):
        self.assertEqual(len(self.r), self.n)

    def test_load(self):
        s = 'c__builtin__\nxrange\np0\n(L0L\nL%dL\nL1L\ntp1\nRp2\n.' % self.n
        self.assertEqual(len(loads(s.encode('ascii'))), len(self.r))

    def test_roundtrip(self):  # fails on 2.6.6, 2.7.3
        self.assertEqual(len(loads(dumps(self.r))), len(self.r))


if __name__ == "__main__":
    unittest.main()