Recently we set up a Hudson continuous integration server at work. We are developing android apps and when I found out that Hudson had an Emma plugin I got excited. I found out about emma and android’s coverage reports. There was however one problem. Android’s <code>ant coverage</code> build will only output an html report. The hudson plugin requires an xml report.
To fix this I created a new build action in my build.xml. This is actually word for word what is in the coverage target with one minor change.
<target name="coverage-xml" depends="-set-coverage-classpath, -install-instrumented, install" description="Runs the tests against the instrumented code and generates code coverage report">
<run-tests-helper emma.enabled="true">
<extra-instrument-args>
<arg value="-e" />
<arg value="coverageFile" />
<arg value="${emma.dump.file}" />
</extra-instrument-args>
</run-tests-helper>
<echo>Downloading coverage file into project directory...</echo>
<exec executable="${adb}" failonerror="true">
<arg line="${adb.device.arg}" />
<arg value="pull" />
<arg value="${emma.dump.file}" />
<arg value="coverage.ec" />
</exec>
<echo>Extracting coverage report...</echo>
<emma>
<report sourcepath="${tested.project.absolute.dir}/${source.dir}" verbosity="${verbosity}">
<!-- TODO: report.dir or something like should be introduced if necessary -->
<infileset dir=".">
<include name="coverage.ec" />
<include name="coverage.em" />
</infileset>
<!-- TODO: reports in other, indicated by user formats -->
<xml outfile="coverage.xml" />
</report>
</emma>
<echo>Cleaning up temporary files...</echo>
<delete dir="${instrumentation.absolute.dir}" />
<delete file="coverage.ec" />
<delete file="coverage.em" />
<echo>Saving the report file in ${basedir}/coverage/coverage.xml</echo>
</target>
Here you can see the only real change to the target is this line:
<xml outfile="coverage.xml" />
as opposed to this
<html outfile="coverage.html" />
. Now we can output our coverage report to our workspace and feed it to the Hudson Emma plugin.