Merge pull request #17 from zopefoundation/fix-pypy3

fix test___setstate___interns_dict_keys failure on pypy3

.travis.yml

@@ -5,7 +5,9 @@ python:
     - 2.7
     - 3.2
     - 3.3
+    - 3.4
     - pypy
+    - pypy3
 install:
     - pip install . --use-mirrors
 script:

persistent/tests/test_persistence.py

@@ -14,6 +14,12 @@
 import os
 import unittest
 
+import platform
+import sys
+py_impl = getattr(platform, 'python_implementation', lambda: None)
+_is_pypy3 = py_impl() == 'PyPy' and sys.version_info[0] > 2
+
+
 class _Persistent_Base(object):
 
     def _makeOne(self, *args, **kw):
@@ -863,6 +869,7 @@ class _Persistent_Base(object):
         self.assertEqual(inst.baz, 'bam')
         self.assertEqual(inst.qux, 'spam')
 
+    if not _is_pypy3:
         def test___setstate___interns_dict_keys(self):
             class Derived(self._getTargetClass()):
                 pass