ANT_17_BRANCH/src/etc/testcases/taskdefs/antstructure.xml

<?xml version="1.0"?>

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

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

  <target name="testCustomPrinter">
    <typedef name="myprinter"
             classname="org.apache.tools.ant.taskdefs.AntStructureTest$MyPrinter">
      <classpath>
        <pathelement path="${tests-classpath.value}"/>
      </classpath>
    </typedef>
    <antstructure output="foo.dtd">
      <myprinter/>
    </antstructure>
  </target>

  <target name="tearDown">
    <delete file="foo.dtd" quiet="true"/>
  </target>

</project>