Issue #19013: add unittest.main() epilogs to unittest.mock's own test modules

Lib/unittest/test/testmock/testcallable.py

@@ -145,3 +145,7 @@ class TestCallable(unittest.TestCase):
         mock.wibble.assert_called_once_with()
 
         self.assertRaises(TypeError, mock.wibble, 'some',  'args')
+
+
+if __name__ == "__main__":
+    unittest.main()

Lib/unittest/test/testmock/testmock.py

@@ -1399,6 +1399,5 @@ class MockTest(unittest.TestCase):
             mock.foo
 
 
-
 if __name__ == '__main__':
     unittest.main()

Lib/unittest/test/testmock/testpatch.py

@@ -1780,6 +1780,5 @@ class PatchTest(unittest.TestCase):
         self.assertIs(os.path, path)
 
 
-
 if __name__ == '__main__':
     unittest.main()