RFR: 8316388: Opensource five Swing component related regression tests

[Alexander Zuev]

On Wed, 13 Mar 2024 16:25:03 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Cleaned up five more tests.
>> 
>> Continuation of https://github.com/openjdk/jdk/pull/18184
>> 
>> Unfortunately one of the commits rendered the whole PR invalid so i closed it and restarting it here.
>> All comments from the previous review are addressed.
>
> test/jdk/javax/swing/JDesktopPane/bug4773378.java line 107:
> 
>> 105:         robot.keyRelease(KeyEvent.VK_CONTROL);
>> 106: 
>> 107:         Thread.sleep(2000);
> 
> Suggestion:
> 
>         robot.waitForIdle();
> 
> Is it really necessary to wait for 2 seconds before shutting down the test.
> 
> According to [JDK-4773378](https://bugs.openjdk.org/browse/JDK-4773378), `NullPointerException` was thrown when <kbd>Ctrl</kbd>+<kbd>F6</kbd> was pressed. The `waitForIdle` method doesn't return until the event queue is empty which implies the keyboard events are handled. It saves nearly 2 seconds.

Ok.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/18259#discussion_r1523831409