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https://issues.apache.org/jira/browse/CASSANDRA-12016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348135#comment-15348135
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Stefan Podkowinski commented on CASSANDRA-12016:
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I've now implemented two more tests for CASSANDRA-3486. I'm quite happy with
the result, especially
[RepairRunnableTest.java|https://github.com/spodkowinski/cassandra/blob/WIP-3486/test/unit/org/apache/cassandra/repair/RepairRunnableTest.java].
The tested code is not that trivial and was not covered by any unit tests
before. I'd personally prefer this approach compared to having to write dtests,
not even mentioning that it takes less than a second to run the java test.
> Create MessagingService mocking classes
> ---------------------------------------
>
> Key: CASSANDRA-12016
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12016
> Project: Cassandra
> Issue Type: New Feature
> Components: Testing
> Reporter: Stefan Podkowinski
> Assignee: Stefan Podkowinski
>
> Interactions between clients and nodes in the cluster are taking place by
> exchanging messages through the {{MessagingService}}. Black box testing for
> message based systems is usually pretty easy, as we're just dealing with
> messages in/out. My suggestion would be to add tests that make use of this
> fact by mocking message exchanges via MessagingService. Given the right use
> case, this would turn out to be a much simpler and more efficient alternative
> for dtests.
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