Fail Tests on write to System.out

Hi,

I am looking for a way to fail unittests when they write to System.out 
or System.err. I found different ways to achieve that and tried a 
solution with a RunListener, because these can be configured using the 
maven-surefire-plugin. Now I discovered, that RunListeners can't really 
fail tests because fail() throws an AssertionException and Exceptions 
remove the RunListener. Is there a better way to discover output?

To summarize what I want:
* a way to discover output via System.out without preventing Logger 
functionality
* this way should not involve huge code changes on the testclasses ( 
like adding TestRules everywhere)
* all unittests which produced output should be reported as "failing" 
when you run with `mvn test`

I tried to answer these questions on SO but got only a few helpful 
responses, so I thought I ask the specialists here and get more 
opinions. For reference the SO questions:
* http://stackoverflow.com/questions/33214683
* http://stackoverflow.com/questions/33207996

Any help on this topic is very appreciated.

Regards
Andreas Worm






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Posted by: Andreas Worm <[email protected]>
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