js/xpconnect/tests/mochitest/test_bug1158558.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=1158558
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Test for Bug 1158558</title>
   9   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  11 </head>
  12 <body>
  13 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1158558">Mozilla Bug 1158558</a>
  14 <p id="display"></p>
  15 <div id="content" style="display: none">
  16   <input id="ipt"></input>
  17 </div>
  18 <pre id="test">
  19 </pre>
  20 <script type="application/javascript">
  21
  22 /** Test for Bug 1158558 **/
  23
  24 // Observers of cycle-collector-begin can be implemented in JS, and
  25 // thus can end up starting an incremental GC while we're in the middle
  26 // of a CC slice.
  27
  28 SimpleTest.waitForExplicitFinish();
  29
  30 var observer = {
  31   observe: function(subject, topic, data) {
  32     SpecialPowers.removeObserver(observer, "cycle-collector-begin");
  33     SpecialPowers.Cu.getJSTestingFunctions().startgc(1);
  34
  35     ok(true, "Do something so the test harness doesn't get angry");
  36
  37     SimpleTest.finish();
  38   }
  39 };
  40
  41 SpecialPowers.addObserver(observer, "cycle-collector-begin");
  42
  43 SpecialPowers.Cu.forceCC();
  44
  45 </script>
  46 </body>
  47 </html>