[jira] [Resolved] (MRUNIT-91) runTest() should optionally ignore output order

["Jim Donofrio (Resolved) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MRUNIT-91?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jim Donofrio resolved MRUNIT-91.
--------------------------------

    Resolution: Fixed
      Assignee: Jim Donofrio

Committed in 1308657. Sorry that took too long, we look forward to more contributions in the future from you
                
> runTest() should optionally ignore output order
> -----------------------------------------------
>
>                 Key: MRUNIT-91
>                 URL: https://issues.apache.org/jira/browse/MRUNIT-91
>             Project: MRUnit
>          Issue Type: Improvement
>    Affects Versions: 0.8.1
>            Reporter: William McNeill
>            Assignee: Jim Donofrio
>            Priority: Minor
>              Labels: order
>             Fix For: 0.9.0
>
>         Attachments: MRUNIT-91-1.patch, MRUNIT-91-2.patch, MRUNIT-91-3.patch, MRUNIT-91.patch
>
>
> Currently MapDriver.runTest() assumes that the order of pairs emitted by the mapper matches the order of the MapDriver.addOutput() calls. However, there are valid mappers that for a given input pair produce output pairs whose order is unspecified for testing purposes. (For example, if the mapper being tested uses a set object for deduplication before emission.) runTest() cannot be used to test these kinds of mappers.
> A workaround is to not use runTest() but instead put the output of run() into a Set and assert that the contents of the set are correct, bypassing MRUnit's validation code.
> A possible improvement would be to add a boolean orderMatters parameter to MapDriver.runTest(), invoking an order-insensitive version of TestDriver.validate() when orderMatters is false and the existing version otherwise.
> For clarity's sake only mappers are discussed in this feature request, but the same applies to reducers as well.

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