RE: [Cobertura-devel] instrumentation jars

[Mark D. <Mar...@sa...>]

> From: cob...@li...=20
> [mailto:cob...@li...] On=20
> Behalf Of Matt Gochnour
> To: cob...@li...
> Subject: [Cobertura-devel] instrumentation jars
>
> I am wondering if I can or should be able to create a jar=20
> file of the instrumented classes to run my application from. =20
> Doing so would then permit me to run my application with this=20
> jar and determine how much of the code is affected or used by=20
> performing a given set of actions in the app, assuming I=20
> could then generate reports based on these steps.=20

Yes, you can certainly do that.

> I have found little information on the cobertura.ser file and=20
> would like to know more about it.  I didn't find any=20
> references to it in the cobertura source tree but could have=20
> missed something.  Where is it specified, and can I change=20
> this, perhaps using a properties file?  Is it a correct=20
> assumption that this is where the instrumented classes are=20
> storing information generated from running the unit tests? =20
> If so, then I could equivalently exercise the instrumented=20
> files by running the app normally and subsequently generating=20
> reports, assuming I can get the reporter to also read in a=20
> specific cobertura.ser. =20

It sounds like you have everything right: Yes, cobertura.ser contains =
information generated from running the unit tests.  Yes, you could =
exercise the instrumented files by running the app normally and then =
running cobertura-report.  In fact, we instrument classes, deploy them =
to a web server, then run JUnit tests which use HtmlUnit to access the =
web server and test the classes.

The default datafile "cobertura.ser" is set in the class =
net.sourceforge.cobertura.coveragedata.CoverageDataFileHandler.  You can =
override this when calling cobertura-instrument and cobertura-report by =
specifying the "datafile" argument.  See =
http://cobertura.sourceforge.net/anttaskreference.html for a tiny bit =
more info.  (And there is an equivalent command-line parameter, if =
you're not using ant)

Specifying the datafile when your classes are running is a bit trickier. =
 You must set the system property "net.sourceforge.cobertura.datafile".  =
You could do something like the following:
"java -Dnet.sourceforge.cobertura.datafile=3Dmydatafile1.ser =
com.lgc.drillingsummarization.Main"

Hope that helps,
Mark