Integrated: 8367991: Update RegionBackground tests to use ScreenCaptureTestWatcher utility

[Jayathirth D V]

On Fri, 19 Sep 2025 08:23:11 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

> We are seeing very rare intermittent failures in RegionBackgroundFillUITest & RegionBackgroundImageUITest tests in linux. We already have [JDK-8328217](https://bugs.openjdk.org/browse/JDK-8328217) to fix this issue.
> 
> To identify the root cause better, we want to capture the test content when it is failing using ScreenCaptureTestWatcher utility.
> 
> Since we want to capture the test window before test stage is cleared. We are now clearing the test stage in the next test setup. Initially tried updating this behaviour in `VisualTestBase` itself, but that causes tests like `test.robot.test3d.PointLightIlluminationTest` to fail as it overrides the test setup functions.
> 
> This change is tested to make sure ScreenCaptureTestWatcher takes appropriate screen capture on failure and CI full headful test run is green.

This pull request has now been integrated.

Changeset: 405450db
Author:    Jayathirth D V <jdv at openjdk.org>
URL:       https://git.openjdk.org/jfx/commit/405450dbbbf5ef1b7ed63ec54666b0d5d6e90c03
Stats:     76 lines in 12 files changed: 28 ins; 20 del; 28 mod

8367991: Update RegionBackground tests to use ScreenCaptureTestWatcher utility

Reviewed-by: kcr, angorya

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PR: https://git.openjdk.org/jfx/pull/1913