Akihiro Suda created ZOOKEEPER-2266:
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Summary: 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
Priority: Minor
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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