1 files changed, 28 insertions, 0 deletions
diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index 0375601c518..c549ac4cc42 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -131,6 +131,16 @@ class TestPartial:
         join = self.partial(''.join)
         self.assertEqual(join(data), '0123456789')
 
+    def test_nested_optimization(self):
+        partial = self.partial
+        # Only "true" partial is optimized
+        if partial.__name__ != 'partial':
+            return
+        inner = partial(signature, 'asdf')
+        nested = partial(inner, bar=True)
+        flat = partial(signature, 'asdf', bar=True)
+        self.assertEqual(signature(nested), signature(flat))
+
 
 @unittest.skipUnless(c_functools, 'requires the C _functools module')
 class TestPartialC(TestPartial, unittest.TestCase):
@@ -882,6 +892,24 @@ class TestTotalOrdering(unittest.TestCase):
             with self.assertRaises(TypeError):
                 a <= b
 
+    def test_pickle(self):
+        for proto in range(4, pickle.HIGHEST_PROTOCOL + 1):
+            for name in '__lt__', '__gt__', '__le__', '__ge__':
+                with self.subTest(method=name, proto=proto):
+                    method = getattr(Orderable_LT, name)
+                    method_copy = pickle.loads(pickle.dumps(method, proto))
+                    self.assertIs(method_copy, method)
+
+@functools.total_ordering
+class Orderable_LT:
+    def __init__(self, value):
+        self.value = value
+    def __lt__(self, other):
+        return self.value < other.value
+    def __eq__(self, other):
+        return self.value == other.value
+
+
 class TestLRU(unittest.TestCase):
 
     def test_lru(self):