RFR: 8336332: Rework tests to avoid unrelated stderr output [v10]

[Andy Goryachev]

On Thu, 18 Sep 2025 18:38:03 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   review comments
>
> tests/system/src/test/java/test/javafx/scene/Snapshot1Test.java line 244:
> 
>> 242:             } finally {
>> 243:                 OutputRedirect.checkAndRestoreStderr(ClassCastException.class);
>> 244:             }
> 
> This fails for me, which is not surprising since the snapshot is asynchronous. You probably want to move everything (the suppressStderr and the try/finally with the checkAndRestoreStderr) out of the runAndWait, but even that might not be sufficient without a delay after `latch.getCount()`.

you are right, I missed the `runAndWait()`

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PR Review Comment: https://git.openjdk.org/jfx/pull/1897#discussion_r2360696605