RFR: 8282270: java/awt/Robot Screen Capture tests fail after 8280861 [v3]

[Alexey Ivanov]

On Thu, 10 Mar 2022 11:22:15 GMT, Maxim Kartashev <duke at openjdk.java.net> wrote:

>> Maxim Kartashev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   HiDPIRobotScreenCaptureTest.java: smaller frame size such that it fits on a 1200x600 screen.
>>   
>>   ScreenCaptureGtkTest.java: smaller frame size; added code to save
>>   the image on failure.
>
> The initial reason for `ScreenCaptureGtkTest` failure was that on Linux the window was *sometimes* positioned such that some of the pixels targeted by `Robot` couldn't be pointed to by the underlying GTK API. So these failures were intermittent and out of control of the test itself; change of the windows' size could've simply changed the window manager's logic for position calculation and thus accidentally made the test pass.

@mkartashev The test results are good.

> The initial reason for ScreenCaptureGtkTest failure was that on Linux the window was sometimes positioned such that some of the pixels targeted by Robot couldn't be pointed to by the underlying GTK API. So these failures were intermittent and out of control of the test itself; change of the windows' size could've simply changed the window manager's logic for position calculation and thus accidentally made the test pass.

I see, thank you for clarification.

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PR: https://git.openjdk.java.net/jdk/pull/7613