How to integrate Junit into Ant?

Ant provides a flexible JUnit task for compling and executing JUnit tests. I hope that you all know what how test classes are written in java. Consider that we have a class named metricEngine and a class named metricEngineTest to test it.

The first thing that has to be done is that both the classes needs to be compiled. This can be done in Ant as follows (considering that both the files are in basedir itself).

<target description="Compiling Files." depends="init" name="compile.source">
<echo>Compiling Files
<javac destdir="${destdir}" srcdir="${basedir}" target="1.5" source="1.5">
<classpath refid="classpath">
<include name="**">
</javac>
</target>

The classpath includes the list of libary files needed to compile these files. They can be set as follows (consider that the basedir/lib contains all the required library (jar) files.


<path id="classpath">
<fileset dir="${basedir}/lib">
<include name="*.jar">
</fileset>
</path>

Now that both the files have been compiled we can test them, this can be done as follows

<target description="Runs the test suite" depends="compile.test" name="test">
<printsummary="yes" fork="yes" haltonfailure="no" showoutput="yes">
<formatter type="plain" usefile="false">
<classpath refid="classpath">
<lt todir="${basedir}/test-result.txt" fork="yes">
<fileset dir="${destdir}">
<include name="**/metricEngineTest.class">
</fileset>
</batchtest>
</junit>
</target>

MOre information on the JUnit tag can be found with ANT Documentation.