RFR: 8306996: Open source Swing MenuItem related tests [v3]

[Abhishek Kumar]

On Thu, 11 May 2023 06:37:22 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Shift and Control mask modified
>
> test/jdk/javax/swing/JMenuItem/bug4966168.java line 26:
> 
>> 24: /*  @test
>> 25:     @bug 4966168
>> 26:     @summary JInternalFrame not serializable in Motif & GTK L&F
> 
> I dont see the test being tested for Motif & GTK which are not default L&F...Probably we should iterate for all L&F just to be sure..
> Also, all `throw new Error` should ideally be changed to `throw new RuntimeException` for all tests in this PR..

After modifying the test to run in all L&F, CI failure observed for linux and linux-aarch machine with the exception 
`javax.swing.UnsupportedLookAndFeelException: [GTK look and feel - com.sun.java.swing.plaf.gtk.GTKLookAndFeel] not supported on this platform`.

On my local machine (Oracle Linux) test passed for all LAFs.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13822#discussion_r1190842678