ANT_17_BRANCH/src/tests/antunit/core/nested-text-test.xml

<project xmlns:au="antlib:org.apache.ant.antunit">

  <target name="testAcceptNested">
    <echo>foo</echo>
  </target>

  <target name="testRejectNested">
    <typedef name="object" classname="java.lang.Object" />
    <au:expectfailure expectedMessage="The &lt;object&gt; type doesn't support nested text data (&quot;foo&quot;).">
      <object>foo</object>
    </au:expectfailure>
  </target>
</project>