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

miss-islington · dslavicek · tomasr8 · web-flow · commit 89d7d3e2b708 · 2026-08-14T13:03:50.000Z
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 4af81d9) Co-authored-by: David <slavicek.david29@gmail.com> Co-authored-by: Tomas R. <tomas.roun8@gmail.com>
diff --git 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)
