Use assertIs to check pointer types in tests

Author: sergey-miryanov

Lib/test/test_ctypes/test_win32.py

@@ -144,8 +144,8 @@ class RECT(Structure):
             self.assertEqual(ret.top, top.value)
             self.assertEqual(ret.bottom, bottom.value)
 
-        self.assertEqual(id(PointInRect.argtypes[0]), id(ReturnRect.argtypes[2]))
-        self.assertEqual(id(PointInRect.argtypes[0]), id(ReturnRect.argtypes[5]))
+        self.assertIs(PointInRect.argtypes[0], ReturnRect.argtypes[2])
+        self.assertIs(PointInRect.argtypes[0], ReturnRect.argtypes[5])
 
 
 if __name__ == '__main__':