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Date: Tue, 10 Nov 2009 23:13:28 +0000 (UTC)
From: "Eli Collins (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-669) Add unit tests
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    [ https://issues.apache.org/jira/browse/HDFS-669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776148#action_12776148 ] 

Eli Collins commented on HDFS-669:
----------------------------------

Thanks Konstantin, I'll try to send out a new patch before the end of the week, if you've got cycles before then and want to respin the base patch feel free to do that and I can add Namenode tests later. Seems like we could do this with two checkins, one to setup the infrastructure and follow on ones that add unit tests themselves.

> 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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