test_cyclecollector.xhtml

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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=

-->

<window title="Mozilla Bug "

        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="

     target="_blank">Mozilla Bug </a>

  </body>

  <!-- test code goes here -->

  <script type="application/javascript">

  <![CDATA[

  /** Test for Bug  **/

  var obs = Cc["@mozilla.org/observer-service;1"]

              .getService(Ci.nsIObserverService);

  var didCall = false;

  var observer = {

    QueryInterface: function QueryInterface(aIID) {

      if (aIID.equals(Ci.nsIObserver) ||

          aIID.equals(Ci.nsISupports))

        return this;

      throw Components.Exception("", Cr.NS_NOINTERFACE);

},

    observe(subject, topic, data) {

      obs.removeObserver(observer, "cycle-collector-begin");

      observer = null;

      didCall = true;

};

  // Start an incremental GC, to make sure that calling ccSlice

  // when an IGC is running finishes the GC.

  SpecialPowers.Cu.getJSTestingFunctions().gcslice(1);

  // Make sure that we call the observer even if we're in the middle

  // of an ICC when we add the observer. See bug 981033.

  SpecialPowers.finishCC();

  SpecialPowers.ccSlice(1);

  obs.addObserver(observer, "cycle-collector-begin");

  SpecialPowers.DOMWindowUtils.cycleCollect();

  ok(didCall, "Observer should have been called!");

]]>

  </script>

</window>