Add Test_Vtbl to test_comobject.py. (#831)

Author: junkmd

comtypes/hints.pyi

@@ -16,15 +16,15 @@ else:
 if sys.version_info >= (3, 10):
     from typing import Concatenate, ParamSpec, TypeAlias
     from typing import TypeGuard as TypeGuard
-    from typing import Unpack as Unpack
 else:
     from typing_extensions import Concatenate, ParamSpec, TypeAlias
     from typing_extensions import TypeGuard as TypeGuard
-    from typing_extensions import Unpack as Unpack
 if sys.version_info >= (3, 11):
     from typing import Self as Self
+    from typing import Unpack as Unpack
 else:
     from typing_extensions import Self as Self
+    from typing import Unpack as Unpack
 
 import comtypes
 from comtypes import IUnknown as IUnknown, COMObject as COMObject, GUID as GUID

comtypes/test/test_comobject.py

@@ -4,7 +4,7 @@
 from unittest import mock
 
 import comtypes.client
-from comtypes import CLSCTX_SERVER, COMObject, IUnknown, hresult
+from comtypes import CLSCTX_SERVER, COMObject, IPersist, IUnknown, hresult
 from comtypes._post_coinit.misc import _CoCreateInstance
 from comtypes.automation import IDispatch
 from comtypes.typeinfo import GUIDKIND_DEFAULT_SOURCE_DISP_IID
@@ -143,3 +143,17 @@ def test(self):
             uiac.CUIAutomation().IPersist_GetClassID(),
             uiac.CUIAutomation._reg_clsid_,
         )
+
+
+class Test_Vtbl(ut.TestCase):
+    def test_com_pointers(self):
+        stdpic = stdole.StdPicture()
+        cuia = uiac.CUIAutomation()
+        self.assertIs(
+            type(stdpic._com_pointers_[IPersist._iid_]),
+            type(cuia._com_pointers_[IPersist._iid_]),
+        )
+        self.assertIn(IDispatch._iid_, stdpic._com_pointers_)
+        self.assertNotIn(IDispatch._iid_, cuia._com_pointers_)
+        self.assertIn(stdole.IPictureDisp._iid_, stdpic._com_pointers_)
+        self.assertIn(uiac.IUIAutomation._iid_, cuia._com_pointers_)