[KAFKA-16354] FinalizedFeatureChangeListenerTest should use mocked latches

• Type: Test
• Status: Resolved
• Priority: Trivial
• Resolution: Won't Fix
• Affects Version/s: 3.7.0
• Component/s: core
• Labels: newbie
• Assignee: Unassigned
• Reporter: Greg Harris
• Created: 07/Mar/24 22:58
• Updated: 22/Mar/24 17:53
• Resolved: 22/Mar/24 17:53

Description

testCacheUpdateWaitFailsForUnreachableVersion takes 30 seconds, and testInitFailureDueToFeatureIncompatibility takes 5 seconds. This appears to be caused by FeatureCacheUpdater#awaitUpdateOrThrow waiting for a real CountDownLatch with a real-time timeout.

Instead, a mocked latch should be used to exit the await immediately.

This should be done both for CPU-independence, and for test execution speed.