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-rw-r--r--Lib/test/pickletester.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index 50e9aa4..3d65383 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -293,6 +293,13 @@ class AbstractPickleTests(unittest.TestCase):
y = self.loads(s)
self.assertEqual(x, y, (proto, x, s, y))
+ def test_singletons(self):
+ for proto in 0, 1, 2:
+ for x in None, False, True:
+ s = self.dumps(x, proto)
+ y = self.loads(s)
+ self.assert_(x is y, (proto, x, s, y))
+
class AbstractPickleModuleTests(unittest.TestCase):
def test_dump_closed_file(self):