content/base/test/test_xbl_userdata.xhtml

<!DOCTYPE HTML>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>Test for getUserData/setUserData support in XBL</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

<style type="text/css">
#t {
-moz-binding: url(#xbl);
}
</style>

<bindings xmlns="http://www.mozilla.org/xbl">
<binding id="xbl" inheritstyle="false">
<implementation><constructor><![CDATA[
  this.textContent = !!(this.getUserData && this.setUserData);
]]></constructor></implementation>
</binding>
</bindings>

</head>
<body>
<p id="display"></p>

<pre id="test">
<script class="testbody">
<![CDATA[
"use strict";

var url = 'data:text/html;charset=utf-8,' +
          encodeURIComponent('<div id=t style="-moz-binding:url(' + location + '#xbl)"></div>');

SimpleTest.waitForExplicitFinish();
addLoadEvent(test1);

function test1() {
  var iframe = document.createElement('iframe');
  iframe.src = url;
  iframe.onload = function() {
    var t = iframe.contentWindow.t;
    is(!!(t.getUserData || t.setUserData), false,
       "getUserData and setUserData should not be visible from the regular content");
    is(t.textContent, "true",
       "getUserData and setUserData should be visible from XBL");
    document.body.removeChild(iframe);
    SimpleTest.finish();
  };
  document.body.appendChild(iframe);
}

]]>
</script>
</pre>
</body>
</html>