RFR: 7001973: java/awt/Graphics2D/CopyAreaOOB.java fails

[Masanori Yano]

On Tue, 12 Oct 2021 06:27:14 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Could you please review the 7001973 fixes?
>> 
>> On Windows, CopyAreaOOB.java fails with a blank window. The cause of this problem is that paint() works one time only. Painting area is not guaranteed when showing a window.
>> 
>> I think this behavior should be removed for purpose of this test (`@summary: Verifies that copyArea() works properly`). Also, this program uses a Robot, but implements waiting logic by itself. This logic should be replaced to Robot API.
>> 
>> This fix works fine in Windows, so this test can be removed from ProblemList.txt. I don't have a Mac environment, so can someone please confirm that this fix will work on Mac?
>
> You will not be able to write the test which will check that only one paint event is posted, it is not guaranteed.
> You can only check that each rendering caused by the paint event will work fine. This test case check that the first event works fine, it can be improved to check all paint events.
> 
> So for the test update, you can add a big delay after the rendering, and wait for what will occur on the screen, any ideas why it may not work? You also can create a separate bug to investigate how we can validate the surface before showing the window so we did not post more events than necessary.

@mrserb Could you please reply to the above comments and fix of test?

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PR: https://git.openjdk.java.net/jdk/pull/5491