This PR fixes the bug where list changes could be wrong (incorrect index). Nearly everything was already in place, but one usecase that had a minor flaw.
Fix is simple, the index we use for iterating must be adjusted in case we remove a change from `addRemoveChanges`. All tests are green and I also added the Tests that were in the ticket. Adjusted to JUnit 5 and with a bit of explaination which helped me a lot to better understand the issue and fix it. ------------- Commit messages: - JDK-8208758: ListChangeBuilder doesn't shift indices after idempotent change pairs Changes: https://git.openjdk.org/jfx/pull/2117/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2117&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8208758 Stats: 177 lines in 2 files changed: 173 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jfx/pull/2117.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2117/head:pull/2117 PR: https://git.openjdk.org/jfx/pull/2117
