RFR: 8356145: ListEnterExitTest.java fails on macos

[Abhishek Kumar]

On Mon, 19 May 2025 12:12:22 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Test was failing on macOS 14.7.1 system in CI pipeline. Logged output suggests that the mouse exit event is not triggered and thus the test fails.
>> Increased number of list items and adjusted the X and Y offset for mouse move events, so the mouse pointer will be within the frame and added robot delay to stabilize the test.
>> 
>> Verified the updated test in CI on macOS 14.7 machine and there is no failure.
>
> test/jdk/java/awt/List/ListEnterExitTest.java line 90:
> 
>> 88:             robot.waitForIdle();
>> 89:             robot.delay(100);
>> 90: 
> 
> I don't really understand why `waitForIdle` and `delay` are needed here at all.
> 
> Robot just moves mouse to generate mouse enter and exit events. It can do so without any delays, can't it?

There is an intermittent failure observed only on macOS 14.7.1 machines. So, I added a small delay and after that on multiple runs in CI, I don't see any failures.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25299#discussion_r2096870648