Alexander Rukletsov commented on MESOS-6387:

The issue I have with parallel tests is that it is unclear how many tests have 
failed. I have to scroll up to gather a list of failed tests, because there is 
no aggregation among shards. For example, in this run two tests have actually 
failed, which is unclear from the output:
[  FAILED  ] 1 test, listed below:
[  FAILED  ] DefaultExecutorTest.KillTaskGroupOnTaskFailure


make[3]: *** [check-local] Error 2
make[2]: *** [check-am] Error 2
make[1]: *** [check] Error 2
make: *** [check-recursive] Error 1

> Improve reporting of parallel test runner.
> ------------------------------------------
>                 Key: MESOS-6387
>                 URL: https://issues.apache.org/jira/browse/MESOS-6387
>             Project: Mesos
>          Issue Type: Improvement
>          Components: test
>            Reporter: Benjamin Bannier
>              Labels: mesosphere, newbie, python
> We should improve the logging of the parallel test runner. Improved logging 
> seems to require some parsing of GoogleTest output, e.g., to prevent 
> interleaving test output from concurrently executing tests.
> We should add a verbose mode which can print results as they arrive from 
> shards in order to not let users wonder if tests are executing.
> We should also provide a way to properly unify output from different shards, 
> e.g., report passed and failed tests in a single list instead of listing all 
> shards separately (this e.g., makes tests from failed shards reported first 
> harder to discover).
> Distinguishing reports from tests run in parallel and sequentially might be 
> useful as well.

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