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From "Grant Ingersoll (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-721) Code coverage reports
Date Sat, 09 Dec 2006 16:28:23 GMT
    [ http://issues.apache.org/jira/browse/LUCENE-721?page=comments#action_12457084 ] 
            
Grant Ingersoll commented on LUCENE-721:
----------------------------------------

OK, I committed this, with a minor change so that it is off by default (thanks Erik, for the
ANT info).

To  run, you need three things:
1. clover.jar in ANT lib
2. clover.license in ANT lib
3. On the command line or in the your ANT properties, if you want it on all the time, you
must specify -Drun.clover=true

Thanks, Micheal.

I will incorporate this into the nightly build per http://issues.apache.org/jira/browse/LUCENE-708

> Code coverage reports
> ---------------------
>
>                 Key: LUCENE-721
>                 URL: http://issues.apache.org/jira/browse/LUCENE-721
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Other
>            Reporter: Michael Busch
>         Assigned To: Grant Ingersoll
>            Priority: Minor
>         Attachments: clover.patch, code_coverage.patch, emma_report.zip
>
>
> Hi all,
> We should be able to measure the code coverage of our unit testcases. I believe it would
be very helpful for the committers, if they could verify before committing a patch if it does
not reduce the coverage. 
> Furthermore people could take a look in the code coverage reports to figure out where
work needs to be done, i. e. where additional testcases are neccessary. It would be nice if
we could add a page to the Lucene website showing the report, generated by the nightly build.
Maybe you could add that to your preview page (LUCENE-707), Grant?
> I attach a patch here that uses the tool EMMA to generate the code coverage reports.
EMMA is a very nice open-source tool released under the CPL (same license as junit). The patch
adds three targets to common-build.xml: 
> - emma-check: verifys if both emma.jar and emma_ant.jar are in the ant classpath 
> - emma-instrument: instruments the compiled code 
> - generate-emma-report: generates an html code coverage report 
> The following steps are neccessary in order to generate a code coverage report:
> - add emma.jar and emma_ant.jar to your ant classpath (download emma from http://emma.sourceforge.net/)
> - execute ant target 'emma-instrument' (depends on compile-test, so it will compile all
core and test classes)
> - execute ant target 'test' to run the unit tests
> - execute ant target 'generate-emma-report'
> To view the emma report open build/test/emma/index.html

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