Tests fail under Py3k

[tseaver]

Tests fail on the trunk which passed with 0.5.0::

$ tox -e py33
======================================================================
ERROR: test_load_str_protocol_1 (zodbpickle.tests.test_pickle_3.PyPicklerBytestrTests)
Test str from protocol=1
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Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 1280, in test_load_str_protocol_1
    b'bytestring \x00\xa0')
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 1265, in unpickleEqual
    loaded = self.loads(data, encoding="bytes")
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 44, in loads
    return u.load()
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/pickle_3.py", line 844, in load
    dispatch[key[0]](self)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/pickle_3.py", line 1033, in load_short_binstring
    value = str(data, self.encoding, self.errors)
LookupError: unknown encoding: bytes

======================================================================
ERROR: test_load_str_protocol_2 (zodbpickle.tests.test_pickle_3.PyPicklerBytestrTests)
Test str from protocol=2
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Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 1287, in test_load_str_protocol_2
    b'bytestring \x00\xa0')
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 1265, in unpickleEqual
    loaded = self.loads(data, encoding="bytes")
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 44, in loads
    return u.load()
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/pickle_3.py", line 844, in load
    dispatch[key[0]](self)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/pickle_3.py", line 1033, in load_short_binstring
    value = str(data, self.encoding, self.errors)
LookupError: unknown encoding: bytes

======================================================================
ERROR: test_pop_empty_stack (zodbpickle.tests.test_pickle_3.CPicklerTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 741, in test_pop_empty_stack
    self.assertRaises((pickle.UnpicklingError, IndexError), self.loads, s)
File "/opt/Python-3.3.1/lib/python3.3/unittest/case.py", line 571, in assertRaises
    return context.handle('assertRaises', callableObj, args, kwargs)
File "/opt/Python-3.3.1/lib/python3.3/unittest/case.py", line 135, in handle
    callable_obj(*args, **kwargs)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 44, in loads
    return u.load()
_pickle.UnpicklingError: unpickling stack underflow

======================================================================
ERROR: test_reduce_bad_iterator (zodbpickle.tests.test_pickle_3.CPicklerTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 1127, in test_reduce_bad_iterator
    self.dumps(C(), proto)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 37, in dumps
    p.dump(arg)
_pickle.PicklingError: fourth element of the tuple returned by __reduce__ must be an iterator, not list

======================================================================
ERROR: test_reduce_bad_iterator (zodbpickle.tests.test_pickle_3.CDumpPickle_LoadPickle)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 1127, in test_reduce_bad_iterator
    self.dumps(C(), proto)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 37, in dumps
    p.dump(arg)
_pickle.PicklingError: fourth element of the tuple returned by __reduce__ must be an iterator, not list

======================================================================
ERROR: test_pop_empty_stack (zodbpickle.tests.test_pickle_3.DumpPickle_CLoadPickle)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 741, in test_pop_empty_stack
    self.assertRaises((pickle.UnpicklingError, IndexError), self.loads, s)
File "/opt/Python-3.3.1/lib/python3.3/unittest/case.py", line 571, in assertRaises
    return context.handle('assertRaises', callableObj, args, kwargs)
File "/opt/Python-3.3.1/lib/python3.3/unittest/case.py", line 135, in handle
    callable_obj(*args, **kwargs)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 44, in loads
    return u.load()
_pickle.UnpicklingError: unpickling stack underflow

======================================================================
ERROR: test_insecure_strings (zodbpickle.tests.test_pickle_3.InMemoryPickleTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/pickletester_3.py", line 645, in test_insecure_strings
    self.assertRaises(ValueError, self.loads, buf)
File "/opt/Python-3.3.1/lib/python3.3/unittest/case.py", line 571, in assertRaises
    return context.handle('assertRaises', callableObj, args, kwargs)
File "/opt/Python-3.3.1/lib/python3.3/unittest/case.py", line 135, in handle
    callable_obj(*args, **kwargs)
File "/home/tseaver/projects/Zope/ZODB/zodbpickle/src/zodbpickle/tests/test_pickle_3.py", line 64, in loads
    return pickle.loads(buf, **kwds)
_pickle.UnpicklingError: pickle data was truncated

----------------------------------------------------------------------
Ran 393 tests in 1.835s

FAILED (errors=7, skipped=20)