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from __future__ import print_function
import unittest
import pickle
import wrapt
class CustomObjectProxy(wrapt.ObjectProxy):
def __reduce_ex__(self, proto):
return (list, (self.__wrapped__,))
class TestObjectPickle(unittest.TestCase):
def test_pickle(self):
proxy = wrapt.ObjectProxy([1])
with self.assertRaises(NotImplementedError) as context:
data = pickle.dumps(proxy)
self.assertTrue(str(context.exception) ==
'object proxy must define __reduce_ex__()')
def test_pickle_proxy(self):
proxy1 = CustomObjectProxy([1])
pickled = pickle.dumps(proxy1)
restored = pickle.loads(pickled)
self.assertEqual(proxy1.__wrapped__, restored)
if __name__ == '__main__':
unittest.main()
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