test_AudioNodeDevtoolsAPI.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test the devtool AudioNode API</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 id(node) {

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

  var ac = new AudioContext();

  var ids;

  var weak;

  (function() {

    var src1 = ac.createBufferSource();

    var src2 = ac.createBufferSource();

    ok(id(src2) > id(src1), "The ID should be monotonic");

    ok(id(src1) > id(ac.destination), "The ID of the destination node should be the lowest");

    ids = [id(src1), id(src2)];

    weak = SpecialPowers.Cu.getWeakReference(src1);

    is(SpecialPowers.unwrap(weak.get()), src1, "The node should support a weak reference");

  })();

  function observer(subject, topic, data) {

    var id = parseInt(data);

    var index = ids.indexOf(id);

    if (index != -1) {

      info("Dropping id " + id + " at index " + index);

      ids.splice(index, 1);

      if (!ids.length) {

        SimpleTest.executeSoon(function() {

          is(weak.get(), null, "The weak reference must be dropped now");

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

          SimpleTest.finish();

});

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

  forceCC();

  forceCC();

  function forceCC() {

    SpecialPowers.DOMWindowUtils.cycleCollect();

    SpecialPowers.DOMWindowUtils.garbageCollect();

    SpecialPowers.DOMWindowUtils.garbageCollect();

</script>

</pre>

</body>

</html>