[jdk21u-dev] RFR: 8353213: Open source several swing tests batch3

Wed Aug 20 21:19:11 UTC 2025

Backporting JDK-8353213: Open source several swing tests batch3. Adds four swing tests to detect regressions. Ran GHA Sanity Checks, local Tier 1 and 2, and new tests directly. Patch is clean. Backporting for parity with Oracle.

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Commit messages:
 - Backport e639cd6a775fabb057b684c70f85b94f84fa5d04

Changes: https://git.openjdk.org/jdk21u-dev/pull/2111/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2111&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353213
  Stats: 296 lines in 4 files changed: 296 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2111.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2111/head:pull/2111

PR: https://git.openjdk.org/jdk21u-dev/pull/2111