Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now

rejects builtin types with not defined __new__.
Added tests for non-pickleable types.

1 files changed, 18 insertions, 0 deletions

diff --git a/Lib/test/test_dictviews.py b/Lib/test/test_dictviews.py
index 7b02ea9eba..c7714cf790 100644
--- a/Lib/test/test_dictviews.py
+++ b/Lib/test/test_dictviews.py
@@ -1,3 +1,5 @@
+import copy
+import pickle
 import unittest
 from test import support
 
@@ -198,6 +200,22 @@ class DictSetTest(unittest.TestCase):
         d[42] = d.values()
         self.assertRaises(RuntimeError, repr, d)
 
+    def test_copy(self):
+        d = {1: 10, "a": "ABC"}
+        self.assertRaises(TypeError, copy.copy, d.keys())
+        self.assertRaises(TypeError, copy.copy, d.values())
+        self.assertRaises(TypeError, copy.copy, d.items())
+
+    def test_pickle(self):
+        d = {1: 10, "a": "ABC"}
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            self.assertRaises((TypeError, pickle.PicklingError),
+                pickle.dumps, d.keys(), proto)
+            self.assertRaises((TypeError, pickle.PicklingError),
+                pickle.dumps, d.values(), proto)
+            self.assertRaises((TypeError, pickle.PicklingError),
+                pickle.dumps, d.items(), proto)
+
 
 def test_main():
     support.run_unittest(DictSetTest)