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Asked: 2026-05-10T14:29:29+00:00

How do I setup an Ant task to generate Emma code coverage reports?

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How do I setup an Ant task to generate Emma code coverage reports?

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  1. To answer questions about where the source and instrumented directories are (these can be switched to whatever your standard directory structure is):

    <property file='build.properties' /> <property name='source' location='src/main/java' /> <property name='test.source' location='src/test/java' /> <property name='target.dir' location='target' /> <property name='target' location='${target.dir}/classes' /> <property name='test.target' location='${target.dir}/test-classes' /> <property name='instr.target' location='${target.dir}/instr-classes' />

    Classpaths:

    <path id='compile.classpath'>   <fileset dir='lib/main'>     <include name='*.jar' />   </fileset> </path>  <path id='test.compile.classpath'>   <path refid='compile.classpath' />   <pathelement location='lib/test/junit-4.6.jar' />   <pathelement location='${target}' /> </path>  <path id='junit.classpath'>   <path refid='test.compile.classpath' />   <pathelement location='${test.target}' /> </path>

    First you need to setup where Ant can find the Emma libraries:

    <path id='emma.lib' >     <pathelement location='${emma.dir}/emma.jar' />     <pathelement location='${emma.dir}/emma_ant.jar' /> </path>

    Then import the task:

    <taskdef resource='emma_ant.properties' classpathref='emma.lib' />

    Then instrument the code:

    <target name='coverage.instrumentation'>     <mkdir dir='${instr.target}'/>     <mkdir dir='${coverage}'/>     <emma>         <instr instrpath='${target}' destdir='${instr.target}' metadatafile='${coverage}/metadata.emma' mode='copy'>             <filter excludes='*Test*'/>         </instr>     </emma>     <!-- Update the that will run the instrumented code -->     <path id='test.classpath'>         <pathelement location='${instr.target}'/>         <path refid='junit.classpath'/>         <pathelement location='${emma.dir}/emma.jar'/>     </path> </target>

    Then run a target with the proper VM arguments like:

    <jvmarg value='-Demma.coverage.out.file=${coverage}/coverage.emma' /> <jvmarg value='-Demma.coverage.out.merge=true' />

    Finally generate your report:

    <target name='coverage.report' depends='coverage.instrumentation'>     <emma>         <report sourcepath='${source}' depth='method'>             <fileset dir='${coverage}' >                 <include name='*.emma' />             </fileset>             <html outfile='${coverage}/coverage.html' />         </report>     </emma> </target>
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