Window.IsClosed is False after window has been closed [UIAComWrapper]

[redsolo]

I found this issue when moving from master branch to UIAComWrapper branch. I found this behaviour when trying to close a common MessageBox.

1. Show a message box
2. Close it by pressing Ok button
3. Verify that IsClosed is True

[redsolo]

Seems like the AutomationElement.IsOffScreen returns false when the message box is not showing. Not sure if this is a problem in the UIAComWrapper or not. Is there any other property that could be used?
I noticed that the ProcessId becomes 0 when the window has closed, but that seems like a hack.
ClassName becomes also "" when it is closed, is an empty ClassName an acceptable state?

[ivan-danilov]

Well, UIA does not provide IsClosed, but IsOffscreen really remains false... seems a bug. I see only one other approach right now: you have native HWND, so you can check whether the window still here. But checking ProcessId would be faster probably.

I guess it is also would be nice to add bug report for MS on the issue.

P.S. Add a blank line between added test and the next one, please.

[redsolo]

Seems like the IsOffscreen property does not exist on the Window when I check with Inspect. I would expect that if the property doesnt exist it would thrown an exception, but perhaps it is returning the default value which would be False...