Issue #23581: Add matmul support to MagicMock.

Patch by Håkan Lövdahl.

2 files changed, 12 insertions, 1 deletions

diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 3b7c157..d6a766d 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -1668,7 +1668,7 @@ magic_methods = (
 )
 
 numerics = (
-    "add sub mul div floordiv mod lshift rshift and xor or pow truediv"
+    "add sub mul matmul div floordiv mod lshift rshift and xor or pow truediv"
 )
 inplace = ' '.join('i%s' % n for n in numerics.split())
 right = ' '.join('r%s' % n for n in numerics.split())
diff --git a/Lib/unittest/test/testmock/testmagicmethods.py b/Lib/unittest/test/testmock/testmagicmethods.py
index cc0e707..f4a292a 100644
--- a/Lib/unittest/test/testmock/testmagicmethods.py
+++ b/Lib/unittest/test/testmock/testmagicmethods.py
@@ -424,5 +424,16 @@ class TestMockingMagicMethods(unittest.TestCase):
         self.assertEqual(list(m), [])
 
 
+    def test_matmul(self):
+        m = MagicMock()
+        self.assertIsInstance(m @ 1, MagicMock)
+        m.__matmul__.return_value = 42
+        m.__rmatmul__.return_value = 666
+        m.__imatmul__.return_value = 24
+        self.assertEqual(m @ 1, 42)
+        self.assertEqual(1 @ m, 666)
+        m @= 24
+        self.assertEqual(m, 24)
+
 if __name__ == '__main__':
     unittest.main()