Issue #23568: Add rdivmod support to MagicMock() objects.

Patch by Håkan Lövdahl.

Lib/unittest/mock.py

@@ -1661,7 +1661,9 @@ magic_methods = (
     "len contains iter "
     "hash str sizeof "
     "enter exit "
-    "divmod neg pos abs invert "
+    # we added divmod and rdivmod here instead of numerics
+    # because there is no idivmod
+    "divmod rdivmod neg pos abs invert "
     "complex int float index "
     "trunc floor ceil "
     "bool next "

Lib/unittest/test/testmock/testmagicmethods.py

@@ -435,5 +435,20 @@ class TestMockingMagicMethods(unittest.TestCase):
         m @= 24
         self.assertEqual(m, 24)
 
+    def test_divmod_and_rdivmod(self):
+        m = MagicMock()
+        self.assertIsInstance(divmod(5, m), MagicMock)
+        m.__divmod__.return_value = (2, 1)
+        self.assertEqual(divmod(m, 2), (2, 1))
+        m = MagicMock()
+        foo = divmod(2, m)
+        self.assertIsInstance(foo, MagicMock)
+        foo_direct = m.__divmod__(2)
+        self.assertIsInstance(foo_direct, MagicMock)
+        bar = divmod(m, 2)
+        self.assertIsInstance(bar, MagicMock)
+        bar_direct = m.__rdivmod__(2)
+        self.assertIsInstance(bar_direct, MagicMock)
+
 if __name__ == '__main__':
     unittest.main()

Misc/NEWS

@@ -18,6 +18,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #23568: Add rdivmod support to MagicMock() objects.
+  Patch by Håkan Lövdahl.
+
 - Issue #2052: Add charset parameter to HtmlDiff.make_file().
 
 - Issue #23138: Fixed parsing cookies with absent keys or values in cookiejar.