test_bug1027864.html

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<html>

<head>

  <title>Test bug 1027864</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<pre id="test">

<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

function observer(subject, topic, data) {

  var id = parseInt(data);

  var index = ids.indexOf(id);

  if (index != -1) {

    ok(true, "Dropping id " + id + " at index " + index);

    ids.splice(index, 1);

    if (!ids.length) {

      SimpleTest.executeSoon(function() {

        SimpleTest.finish();

});

function id(node) {

  return SpecialPowers.getPrivilegedProps(node, "id");

SpecialPowers.addAsyncObserver(observer, "webaudio-node-demise", false);

SimpleTest.registerCleanupFunction(function() {

  SpecialPowers.removeAsyncObserver(observer, "webaudio-node-demise");

});

var ac = new AudioContext();

var ids;

(function() {

  var delay = ac.createDelay();

  delay.delayTime.value = 0.03;

  var gain = ac.createGain();

  gain.gain.value = 0.6;

  delay.connect(gain);

  gain.connect(delay);

  gain.connect(ac.destination);

  var source = ac.createOscillator();

  source.connect(gain);

  source.start(ac.currentTime);

  source.stop(ac.currentTime + 0.1);

  ids = [ id(delay), id(gain), id(source) ];

})();

setInterval(function() {

  forceCC();

}, 200);

function forceCC() {

  SpecialPowers.DOMWindowUtils.cycleCollect();

  SpecialPowers.DOMWindowUtils.garbageCollect();

</script>

</pre>

</body>

</html>