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https://issues.apache.org/jira/browse/KAFKA-4657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15922752#comment-15922752
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ASF GitHub Bot commented on KAFKA-4657:
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Github user asfgit closed the pull request at:
https://github.com/apache/kafka/pull/2672
> Improve test coverage of CompositeReadOnlyWindowStore
> -----------------------------------------------------
>
> Key: KAFKA-4657
> URL: https://issues.apache.org/jira/browse/KAFKA-4657
> Project: Kafka
> Issue Type: Sub-task
> Components: streams
> Reporter: Damian Guy
> Fix For: 0.11.0.0
>
>
> No tests that cover what happens when {{windowStore.fetch(...)}} throw an
> {{InvalidStateStoreException}}, i.e., we should check that we get an
> {{InvalidStateStoreException}} with the modified message.
> There are no tests that cover the {{WindowStoreIterator}} that is returned
> when there are no results. In this case we should at least add tests that
> show the expected behaviour for {{peekNextKey}}, {{hasNext}}, and {{next}}
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