[3.13] pythongh-65454: avoid triggering call to a PropertyMock in Non…

…CallableMock.__setattr__ (pythonGH-120019) (python#120336) pythongh-65454: avoid triggering call to a PropertyMock in NonCallableMock.__setattr__ (pythonGH-120019) (cherry picked from commit 9e9ee50) Co-authored-by: blhsing <[email protected]>
miss-islington · Jun 11, 2024 · 81eae21 · 81eae21
1 parent aba5f2a
commit 81eae21
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diff --git a/Lib/test/test_unittest/testmock/testhelpers.py b/Lib/test/test_unittest/testmock/testhelpers.py
@@ -1127,6 +1127,14 @@ def test_propertymock_side_effect(self):
         p.assert_called_once_with()
 
 
+    def test_propertymock_attach(self):
+        m = Mock()
+        p = PropertyMock()
+        type(m).foo = p
+        m.attach_mock(p, 'foo')
+        self.assertEqual(m.mock_calls, [])
+
+
 class TestCallablePredicate(unittest.TestCase):
 
     def test_type(self):

diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
@@ -830,6 +830,9 @@ def __setattr__(self, name, value):
             mock_name = f'{self._extract_mock_name()}.{name}'
             raise AttributeError(f'Cannot set {mock_name}')
 
+        if isinstance(value, PropertyMock):
+            self.__dict__[name] = value
+            return
         return object.__setattr__(self, name, value)
 
 

diff --git a/Misc/NEWS.d/next/Library/2024-06-04-08-57-02.gh-issue-65454.o9j4wF.rst b/Misc/NEWS.d/next/Library/2024-06-04-08-57-02.gh-issue-65454.o9j4wF.rst
@@ -0,0 +1 @@
+:func:`unittest.mock.Mock.attach_mock` no longer triggers a call to a ``PropertyMock`` being attached.