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<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=793433
-->
<window title="Mozilla Bug 793433"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>

  <!-- test results are displayed in the html:body -->
  <body xmlns="http://www.w3.org/1999/xhtml">
  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=793433"
     target="_blank">Mozilla Bug 793433</a>
  <p id="display"></p>
  <div id="content" style="display: none"/>
  </body>

  <!-- test code goes here -->
  <script type="application/javascript"><![CDATA[

function shouldThrow(fun, args, msg) {
  try {
    fun.apply(this, args);
    ok(false, msg);
  } catch (e) {
    ok(true, msg+" -- "+e);
  }
}

function do_registerTopLevelWindow(win) {
  Services.appShell.registerTopLevelWindow(win);
}

shouldThrow(
  do_registerTopLevelWindow, [null],
  "registering null as a top-level window should throw");

shouldThrow(
  do_registerTopLevelWindow, [{}],
  "registering a void object as a top-level window should throw");

  ]]></script>
</window>