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improve test_copy_reduce and test_deepcopy_reduce coverage #154182

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improve test_copy_reduce and test_deepcopy_reduce coverage #154182

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f5f296c
improve test_copy_reduce and test_deepcopy_reduce coverage
dslavicek Jul 19, 2026
1413c2e
add assert __reduce_ex__ not called
dslavicek Jul 23, 2026
8d02f69
change reduce params in test copy and deepcopy reduce_ex
dslavicek Jul 23, 2026
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16 changes: 14 additions & 2 deletions Lib/test/test_copy.py
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Original file line number Diff line number Diff line change
Expand Up @@ -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()
Expand All @@ -70,9 +70,15 @@ def __reduce__(self):

def test_copy_reduce(self):
class C(object):
def __reduce_ex__(self, proto):
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)
Expand Down Expand Up @@ -329,7 +335,7 @@ 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()
Expand All @@ -339,9 +345,15 @@ def __reduce__(self):

def test_deepcopy_reduce(self):
class C(object):
def __reduce_ex__(self, proto):
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)
Expand Down
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