RFR: 8296554: MouseLocationOnScreenTest sometime fails when system is busy

[Andy Goryachev]

On Fri, 11 Apr 2025 09:37:12 GMT, Gopal Pattnaik <duke at openjdk.org> wrote:

> There was a Assertion fail issue in mouse location test case JDK-8296554,
> Reason: We felt the one mili second delay time for the Robot test may be insufficient in few OS.
> Solution: We Changed the delay time to three mili second.
> 
> Verification:
> Tested in Windows 11, and the Assert fail issue is not found.

tests/system/src/test/java/test/robot/javafx/scene/MouseLocationOnScreenTest.java line 46:

> 44:     static CountDownLatch startupLatch = new CountDownLatch(1);
> 45:     static Robot robot;
> 46:     private static int DELAY_TIME = 3;

minor: `Util.sleep()` could be moved to `validate()`

question: even though the value is 3x the original, should it be longer to account for any hiccups?  maybe 10?  what do you think?

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PR Review Comment: https://git.openjdk.org/jfx/pull/1772#discussion_r2039703236