jetty-deploy/src/test/resources/webapps/foo.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">
<Configure class="org.eclipse.jetty.webapp.WebAppContext">
    <Set name="contextPath">/foo</Set>
    <Set name="war">
        <Property name="test.webapps" default="." />/foo.war
    </Set>
</Configure>