Ant and the junit task

Question

Can anyone tell me how to run JUnit from Ant? I have a directory structure set up with the source files in src, the .class files in build, and the junit task in Ant seems to be unable to find my .class files.
I can run the test using the java task (which would be an option, when all else fails):
  <target name="test" depends="init,compile"
        description="unit test" >
    <java  classname="${testclassname}"
           failonerror="yes"
           classpath="${fullclasspath}"
    >
    </java>
  </target>I can run the test using the junit task from the build directory (but you lose the depends functionality, as you cannot compile from here):
  <target name="unit" depends="init"
        description="unit test" >
    <junit printsummary="yes"
    >
      <test name="it.FlagHandlerTest"/>
      <formatter type="plain"/>
    </junit>
  </target>But I cannot persuade the junit task to run from the project top directory (java.lang.ClassNotFoundException thrown in JUnit), eg.
  <target name="unit" depends="init,compile"
        description="unit test" >
    <junit printsummary="yes"
           dir="${build}"
           fork="yes"
    >
      <test name="it.FlagHandlerTest"/>
      <formatter type="plain"/>
      <classpath>
        <pathelement location="${fullclasspath}"/>
      </classpath>
    </junit>
  </target>I am using Ant 6.1, JUnit 3.8.1, Java 1.4.2.

Answer 1

The JUnit task requires 2 jars to be in the classpath when Ant is run:
1) ant-junit.jar
2) junit.jar
According to the Ant manual you have two choices:
1) Add junit.jar to the classpath
2) Remove ant-junit.jar from the ant/lib directory and redefine the task in the build script, with a <taskdef> and a nested <classpath> elements.