[3.13] improve test_copy_reduce and test_deepcopy_reduce coverage (GH-154182) (#155794)

https://github.com/python/cpython/commit/89d7d3e2b7082e2bee9072feda061539b1a9be76
commit: 89d7d3e2b7082e2bee9072feda061539b1a9be76
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: tomasr8 <[email protected]>
date: 2026-08-14T13:03:50Z
summary:

[3.13] improve test_copy_reduce and test_deepcopy_reduce coverage (GH-154182) (#155794)

improve test_copy_reduce and test_deepcopy_reduce coverage (GH-154182)

* improve test_copy_reduce and test_deepcopy_reduce coverage

* add assert __reduce_ex__ not called

* change reduce params in test copy and deepcopy reduce_ex

* change reduce_ex params in test copy and deepcopy reduce

---------
(cherry picked from commit 4af81d9215a8f267c5caeecf98c789999c108f80)

Co-authored-by: David <[email protected]>
Co-authored-by: Tomas R. <[email protected]>

files:
M Lib/test/test_copy.py

diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
index 69a981cd14ca7b..23f864daa2e60f 100644
--- a/Lib/test/test_copy.py
+++ b/Lib/test/test_copy.py
@@ -60,7 +60,7 @@ class C(object):
             def __reduce_ex__(self, proto):
                 c.append(1)
                 return ""
-            def __reduce__(self):
+            def __reduce__(*args):
                 self.fail("shouldn't call this")
         c = []
         x = C()
@@ -70,9 +70,15 @@ def __reduce__(self):
 
     def test_copy_reduce(self):
         class C(object):
+            def __reduce_ex__(*args):
+                self.fail("shouldn't call this")
             def __reduce__(self):
                 c.append(1)
                 return ""
+            def __getattribute__(self, name):
+                if name == "__reduce_ex__":
+                    raise AttributeError(name)
+                return object.__getattribute__(self, name)
         c = []
         x = C()
         y = copy.copy(x)
@@ -323,7 +329,7 @@ class C(object):
             def __reduce_ex__(self, proto):
                 c.append(1)
                 return ""
-            def __reduce__(self):
+            def __reduce__(*args):
                 self.fail("shouldn't call this")
         c = []
         x = C()
@@ -333,9 +339,15 @@ def __reduce__(self):
 
     def test_deepcopy_reduce(self):
         class C(object):
+            def __reduce_ex__(*args):
+                self.fail("shouldn't call this")
             def __reduce__(self):
                 c.append(1)
                 return ""
+            def __getattribute__(self, name):
+                if name == "__reduce_ex__":
+                    raise AttributeError(name)
+                return object.__getattribute__(self, name)
         c = []
         x = C()
         y = copy.deepcopy(x)

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