RFR: 8307130: Open source few Swing JMenu tests [v2]

[Alisen Chung]

On Sat, 6 May 2023 00:50:33 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

>> Open source few Swing JMenu tests
>
> Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add Util. Change helper path

test/jdk/javax/swing/JMenu/bug5013739.java line 85:

> 83:             robo.delay(1000);
> 84:         } finally {
> 85:             SwingUtilities.invokeAndWait(() -> mainFrame.dispose());

probably doesn't matter, but should this check if mainFrame != null?

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PR Review Comment: https://git.openjdk.org/jdk/pull/13839#discussion_r1187762034