ant/src/tests/antunit/taskdefs/retry-test.xml

<?xml version="1.0" encoding="utf-8"?>
<project name="retry-test" default="antunit" xmlns:au="antlib:org.apache.ant.antunit">
  <import file="../antunit-base.xml"/>

  <target name="test-fail-and-retry">
    <property name="i" value="3"/>
    <property name="dest" value="${java.io.tmpdir}/dest"/>
    <!-- just in case this ever becomes a legit url... -->
    <property name="src" value="http://iojasodjojaosdj"/>
    <au:expectfailure expectedmessage="Task [get] failed after [${i}] attempts, giving up">
      <retry retrycount="${i}">
        <get src="${src}" dest="${dest}"/>
      </retry>
    </au:expectfailure>
    <au:assertLogContains text="Attempt [1] error occured, retrying..."/>
  </target>

  <target name="test-success">
    <property name="i" value="3"/>
    <property name="dest" value="${java.io.tmpdir}/dest"/>
    <retry retrycount="${i}">
      <touch file="${dest}"/>
    </retry>
    <au:assertLogDoesntContain text="Attempt [1] error occured, retrying..."/>
  </target>

</project>