guozhangwang opened a new pull request, #12476: URL: https://github.com/apache/kafka/pull/12476
While working on [KAFKA-13877](https://issues.apache.org/jira/browse/KAFKA-13877), I feel it's an overkill to introduce the whole test class as an integration test, since all we need is to just test the assignor itself which could be a unit test. Running this suite with 9+ instances takes long time and is still vulnerable to all kinds of timing based flakiness. A better choice is to reduce it as a unit test, similar to HighAvailabilityStreamsPartitionAssignorTest that just test the behavior of the assignor itself, rather than creating many instances hence depend on various timing bombs to not explode. Since we mock everything, there's no flakiness anymore. Plus we greatly reduced the test runtime (on my local machine, the old integration takes about 35 secs to run the whole suite, while the new one take 20ms on average). ### Committer Checklist (excluded from commit message) - [ ] Verify design and implementation - [ ] Verify test coverage and CI build status - [ ] Verify documentation (including upgrade notes) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org