diff options
Diffstat (limited to 'Lib/test/pickletester.py')
| -rw-r--r-- | Lib/test/pickletester.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py index 86869e18e1..86d668ef6f 100644 --- a/Lib/test/pickletester.py +++ b/Lib/test/pickletester.py @@ -768,6 +768,15 @@ class AbstractPickleTests(unittest.TestCase): u = self.loads(s) self.assertEqual(NotImplemented, u) + def test_singleton_types(self): + # Issue #6477: Test that types of built-in singletons can be pickled. + singletons = [None, ..., NotImplemented] + for singleton in singletons: + for proto in protocols: + s = self.dumps(type(singleton), proto) + u = self.loads(s) + self.assertIs(type(singleton), u) + # Tests for protocol 2 def test_proto(self): |