ant/src/etc/testcases/taskdefs/jar.xml

<?xml version="1.0"?>

<project name="jar-test" basedir="." default="test1">

  <target name="test1">
    <jar/>
  </target>

  <target name="test2">
    <jar
    	jarfile="jar.tmp"
    	manifest="none"
    />
  </target>

  <target name="test3">
    <jar
    	destfile="jar.tmp"
	whenempty="format C: /y" 
    />
  </target>

  <target name="test4">
   <!-- delete the tmp.jar or the next test will fail -->
   <delete file="tmp.jar"/>
   <jar
    	destfile="tmp.jar"
	basedir="."
	includes="jar.xml"
    />
  </target>

  <!-- This test is to make sure upToDate is working -->
  <target name="test5">
    <jar
    	destfile="tmp.jar"
	basedir="."
	includes="jar.xml"
    />
  </target>

</project>