------
 Failing the Build if JUnit is Missing
 ------
 Benjamin Bentmann
 ------
 March 2008
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 ~~ to you under the Apache License, Version 2.0 (the
 ~~ "License"); you may not use this file except in compliance
 ~~ with the License.  You may obtain a copy of the License at
 ~~
 ~~   http://www.apache.org/licenses/LICENSE-2.0
 ~~
 ~~ Unless required by applicable law or agreed to in writing,
 ~~ software distributed under the License is distributed on an
 ~~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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Failing the Build if JUnit is Missing

 The build scripts generated by the Ant Plugin require JUnit to run the unit tests. By default, the <<<build.xml>>> will
 only output a warning if JUnit was not found on the class path, i.e. the build simply continues without running the
 unit tests. If you rather want the build to fail in this case, you can easily customize the <<<build.xml>>> by
 overriding the target <<<junit-missing>>>:

+-----+
<?xml version="1.0" encoding="UTF-8"?>

<!-- ====================================================================== -->
<!-- Ant build file (http://ant.apache.org/) for Ant 1.6.2 or above.        -->
<!-- ====================================================================== -->

<project name="%PROJECT_ARTIFACT_ID%" default="package" basedir=".">
  ...

  <!-- ====================================================================== -->
  <!-- Unit testing, overridden to fail upon missing JUnit                    -->
  <!-- ====================================================================== -->

  <target name="junit-missing"
          depends="test-junit-status"
          if="junit.missing">
    <property name="ant.libdir" location="${ant.home}/lib"/>
    <echo level="error">==================================== ERROR ====================================</echo>
    <echo level="error"> JUnit is not present in your $ANT_HOME/lib directory, aborting build.         </echo>
    <echo level="error"> Please copy "junit.jar" to "${ant.libdir}".                                   </echo>
    <echo level="error">===============================================================================</echo>
    <fail>JUnit not found on class path, cannot run unit tests.</fail>
  </target>

  ...
</project>
+-----+