This PR proposes to improve the performance of the `TestSegmentOffset` by removing throwing exceptions (which is slow under certain configurations). Furthermore, the PR proposes to convert the test framework from testng to junit.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - Improve TestSegmentOffset and convert to junit Changes: https://git.openjdk.org/jdk/pull/30833/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30833&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8378901 Stats: 26 lines in 1 file changed: 7 ins; 2 del; 17 mod Patch: https://git.openjdk.org/jdk/pull/30833.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30833/head:pull/30833 PR: https://git.openjdk.org/jdk/pull/30833
