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, 17 insertions, 0 deletions

diff --git a/Lib/test/test_generators.py b/Lib/test/test_generators.py
index 25cc628..b92d5ce 100644
--- a/Lib/test/test_generators.py
+++ b/Lib/test/test_generators.py
@@ -1,4 +1,6 @@
+import copy
 import gc
+import pickle
 import sys
 import unittest
 import warnings
@@ -111,6 +113,21 @@ class GeneratorTest(unittest.TestCase):
         self.assertEqual(gen.__qualname__,
                          "GeneratorTest.test_name.<locals>.<genexpr>")
 
+    def test_copy(self):
+        def f():
+            yield 1
+        g = f()
+        with self.assertRaises(TypeError):
+            copy.copy(g)
+
+    def test_pickle(self):
+        def f():
+            yield 1
+        g = f()
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            with self.assertRaises((TypeError, pickle.PicklingError)):
+                pickle.dumps(g, proto)
+
 
 class ExceptionTest(unittest.TestCase):
     # Tests for the issue #23353: check that the currently handled exception