[jira] [Created] (KAFKA-12253) Add tests that cover all of all of the cases for ReplicatedLog::validateOffsetAndEpoch

["Jose Armando Garcia Sancio (Jira)" <ji...@apache.org>]

Jose Armando Garcia Sancio created KAFKA-12253:
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             Summary: Add tests that cover all of all of the cases for ReplicatedLog::validateOffsetAndEpoch
                 Key: KAFKA-12253
                 URL: https://issues.apache.org/jira/browse/KAFKA-12253
             Project: Kafka
          Issue Type: Sub-task
          Components: replication
            Reporter: Jose Armando Garcia Sancio


Add tests for the cases that ReplicatedLog::validateOffsetAndEpoch needs to cover. This include:

 
 # epoch > last known epoch =>  return diverging(log.endOffset, log.lastFetchedEpoch)
 # epoch < oldest snapshot epoch => return snapshot(latestSnapshotId)
 # epoch == oldest snapshot epoch:
 ## offset < oldest snapshot offset => return snapshot(latestSnapshotId)
 ## offset == oldest snapshot offset => return valid
 # Now look up end offset for epoch:
 ## epoch unknown => return diverging(endOffset/epoch)
 ## found epoch; end offset < offset => return diverging(endOffset/epoch)
 ## valid



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