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

<?xml version="1.0" encoding="utf-8"?>
<!--
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  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
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      https://www.apache.org/licenses/LICENSE-2.0

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

  <target name="setUp">
    <property name="i" value="3"/>
    <mkdir dir="${output}"/>
    <property name="dest" value="${output}/dest"/>
  </target>

  <target name="test-fail-and-retry" depends="setUp">
    <!-- just in case this ever becomes a legit url... -->
    <property name="src" value="https://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 occurred; retrying..."/>
  </target>

  <target name="test-success" depends="setUp">
    <retry retrycount="${i}">
      <touch file="${dest}"/>
    </retry>
    <au:assertLogDoesntContain text="Attempt [1]: error occurred; retrying..."/>
  </target>

</project>