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https://issues.apache.org/jira/browse/HDFS-669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12773212#action_12773212
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Konstantin Boudnik commented on HDFS-669:
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I was trying to review it but patch doesn't apply anymore.
> Add unit tests
> ---------------
>
> Key: HDFS-669
> URL: https://issues.apache.org/jira/browse/HDFS-669
> Project: Hadoop HDFS
> Issue Type: Test
> Components: test
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: HDFS669.patch
>
>
> Most HDFS tests are functional tests that test a feature end to end by
> running a mini cluster. We should add more tests like TestReplication that
> attempt to stress individual classes in isolation, ie by stubbing out
> dependencies without running a mini cluster. This allows for more fine-grain
> testing and making tests run much more quickly because they avoid the cost of
> cluster setup and teardown. If it makes sense to use another framework
> besides junit we should standardize with MAPREDUCE-1050.
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