RFR: 8354695: Open source several swing tests batch7 [v3]

[Alexander Zuev]

On Tue, 22 Apr 2025 01:06:11 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

>> Open-sourcing and standardizing several swing tests (JScrollPane & JRootPane)
>
> Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Move width and height to EDT

test/jdk/javax/swing/JRootPane/bug4403624.java line 92:

> 90: 
> 91:             r.mouseMove(p.x + OFFSET, p.y + OFFSET);
> 92:             Color c = r.getPixelColor(p.x + OFFSET, p.y + OFFSET);

That might fail intermittently on the macOS because you take a pixel color exactly at the place where mouse cursor is and it's a known issue on m1 based macs that cursor sometimes messes up the screenshots and pixel color grabbing - either directly (cursor is visible on screenshot) or indirectly (macOS calculates cursor effects such as shadow leaving traces of it in the screen buffer that we analyze). Whenever it is logically possible i'm trying to move cursor at least couple of pixels away from the area i'm going to analyze for color comparison.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24758#discussion_r2054489527