SONAR – Measure Code Coverage using Cobertura

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You configure the Sonar task to upload unit test and cobertura reports generated by other parts of your build logic.

This is in contrast to Maven which has a standard build life-cycle that Sonar is able to leverage.

Unit test and code coverage

The following logic runs the unit tests with cobertura instrumented classes. An XML coverage report is generated by cobertura at the end:

<target name="instrument-classes" depends="compile-tests">
    <taskdef resource="tasks.properties" classpathref="https://stackoverflow.com/questions/7747587/test.path"/>
    <cobertura-instrument todir="${instrumented.classes.dir}" datafile="${build.dir}/cobertura.ser">
        <fileset dir="${classes.dir}"/>
    </cobertura-instrument>
</target>

<target name="junit" depends="instrument-classes">
    <junit printsummary="yes" haltonfailure="yes">
        <classpath>
            <path refid="https://stackoverflow.com/questions/7747587/test.path"/>
            <pathelement path="${instrumented.classes.dir}"/>
            <pathelement path="${test.classes.dir}"/>
        </classpath>

        <formatter type="xml"/>

        <batchtest fork="yes" todir="${test.reports.dir}">
            <fileset dir="${test.src.dir}">
                <include name="**/*Test*.java"/>
                <exclude name="**/AllTests.java"/>
            </fileset>
        </batchtest>
    </junit>
</target>

<target name="test" depends="junit">
    <cobertura-report format="xml" datafile="${build.dir}/cobertura.ser" destdir="${cobertura.reports.dir}"/> 
</target>

Invoking Sonar

I normally use a very simple Sonar target:

<target name="sonar" depends="test">
    <taskdef uri="antlib:org.sonar.ant" resource="org/sonar/ant/antlib.xml" classpathref="https://stackoverflow.com/questions/7747587/sonar.path"/>

    <sonar:sonar key="${sonar.project.key}" version="${sonar.project.version}" xmlns:sonar="antlib:org.sonar.ant"/>
</target>

And use a properties file to control all aspects of Sonar’s behaviour:

sonar.project.key=org.demo:demo
sonar.project.version=1.0-SNAPSHOT
sonar.projectName=Demo project

sonar.host.url=http://myserver:9000
sonar.jdbc.url=jdbc:mysql://myserver:3306/sonar?useUnicode=true&characterEncoding=utf8
sonar.jdbc.driverClassName=com.mysql.jdbc.Driver
sonar.jdbc.username=sonar
sonar.jdbc.password=sonar

sonar.sources=${src.dir}
sonar.tests=${test.src.dir}
sonar.binaries=${classes.dir}

sonar.dynamicAnalysis=reuseReports
sonar.surefire.reportsPath=${test.reports.dir}
sonar.java.coveragePlugin=cobertura
sonar.cobertura.reportsPath=${cobertura.reports.dir}/coverage.xml

Demonstrates how Sonar can be configured to pick up the unit test reports created by junit and the code coverage report generated by cobertura.

The build does not have to run on the same server as Sonar. In that case one must provide the remote Sonar URL and JDBC credentials.

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