Bertrand Dechoux created MRUNIT-140:
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             Summary: TestDriver should use composition and have less 
responsilibities
                 Key: MRUNIT-140
                 URL: https://issues.apache.org/jira/browse/MRUNIT-140
             Project: MRUnit
          Issue Type: Task
            Reporter: Bertrand Dechoux
            Priority: Minor


Due to more and more (welcomed) refactorings, TestDriver is becoming bigger and 
bigger. Reducing code duplication is a good thing. But TestDriver begins to 
have too many responsibilities. A solution would be to use composition in order 
to extract responsibilities from it.

I currently see a few topics that could profit from it:
* Errors recording
* Distributed Cache
* Counter validation

You are welcome to suggest more. This work might in the end also help with the 
implementation of the new API by providing a cleaner internal organisation of 
MRUnit.

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