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https://issues.apache.org/jira/browse/MRUNIT-180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13618792#comment-13618792
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Brock Noland commented on MRUNIT-180:
-------------------------------------
Hi,
1) It appears the patch doesn't change the interface and as such is backwards
compatible?
2) Can you explain the unrelated changes in TestMapReduceDriver?
> Being able to use a comparator on runTest
> -----------------------------------------
>
> Key: MRUNIT-180
> URL: https://issues.apache.org/jira/browse/MRUNIT-180
> Project: MRUnit
> Issue Type: Improvement
> Affects Versions: 0.9.0
> Reporter: Ximo Guanter
> Priority: Minor
> Fix For: 1.1.0
>
> Attachments: MRUNIT-180.patch
>
>
> Sometimes using withOutput and runTest is not possible if the .equals method
> is not the correct way to compare equality. This is especially true for
> Mapper and Reducers that return doubles or structure with doubles in them,
> since there is no way to specify a desired error tolerance for the result.
> Being able to specify a Comparator for the key and value types enabled the
> usage of runTest for these cases.
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