src/etc/testcases/taskdefs/gzip.xml

<?xml version="1.0"?>

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

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

  <target name="test2">
    <gzip src=""/>
  </target>

  <target name="test3">
    <gzip zipfile=""/>
  </target>

  <target name="test4">
    <gzip src="." zipfile=""/>
  </target>

  <target name="test5">
    <gzip src="." zipfile="gzip.tmp"/>
  </target>

</project>