[jira] [Commented] (ZOOKEEPER-2266) Integrate JaCoCo Coverage Library

["Norbert Kalmár (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17186364#comment-17186364 ] 

Norbert Kalmár commented on ZOOKEEPER-2266:
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Hi [~suda], we wanted to do a code coverage report, and JaCoCo maven integration seemed the way to go (for example Apache Phoenix already integrated).
Before I created a jira and go ahead to implement, I found your Jira. Do you want to implement the maven integration for JaCoCo? 
If not, I can take over this jira.
Thanks!

> Integrate JaCoCo Coverage Library
> ---------------------------------
>
>                 Key: ZOOKEEPER-2266
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2266
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: tests
>            Reporter: Akihiro Suda
>            Assignee: Akihiro Suda
>            Priority: Minor
>         Attachments: ZOOKEEPER-2266-v1.patch, ZOOKEEPER-2266-v2.patch, ZOOKEEPER-2266-v3.patch, ZOOKEEPER-2266-v4.patch, jacoco-report-example.zip
>
>
> I would like to propose integration of [JaCoCo|http://www.eclemma.org/jacoco/] coverage library with ZooKeeper.
> h4. Purposes
>  - To find poorly covered methods, and improve JUnit testcases to cover them
>  - To estimate causes of flaky testcases (e.g. ZOOKEEPER-2080, ZOOKEEPER-2252, ZOOKEEPER-1868) by comparing reports from succeeded experiments and failed ones (I'm recently interested in how we can systematically realize this.)
> h4. Advantages of JaCoCo
>  - Support recent JDKs (including JDK 8)
>  - Low overhead
>  - Released under EPL
>  -- Note: cobertura has been removed from the code base because it is released under GPL ( ZOOKEEPER-75, http://www.apache.org/legal/resolved.html#category-x )
> h4. Usage
> {panel}
> $ ant test #(plus optionally, -Dtestcase=.. -Dtest.method=..)
> $ ant jacoco-report
> $ x-www-browser build/test/jacoco/reports/index.html &
> {panel}
> Example: jacoco-report-example.zip
> h4. Possible Future Work
> - Integrate to Jenkins buildbot so that we can check coverage after each of builds



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