test_ScriptProcessorCollected1.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test ScriptProcessorNode in cycle with no listener is collected</title>

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

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

</head>

<body>

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

SimpleTest.waitForExplicitFinish();

var observer = function(subject, topic, data) {

  var id = parseInt(data);

  var index = ids.indexOf(id);

  if (index != -1) {

    ok(true, "Collected AudioNode id " + id + " at index " + index);

    ids.splice(index, 1);

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

SimpleTest.registerCleanupFunction(function() {

  if (observer) {

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

});

var ac = new AudioContext();

var testProcessor = ac.createScriptProcessor(256, 1, 0);

var delay = ac.createDelay();

testProcessor.connect(delay);

delay.connect(testProcessor);

var referenceProcessor = ac.createScriptProcessor(256, 1, 0);

var gain = ac.createGain();

gain.connect(referenceProcessor);

var processCount = 0;

testProcessor.onaudioprocess = function(event) {

  ++processCount;

  switch (processCount) {

  case 1:

    // Switch to listening to referenceProcessor;

    referenceProcessor.onaudioprocess = event.target.onaudioprocess;

    referenceProcessor = null;

    event.target.onaudioprocess = null;

    break;

  case 2:

    // There are no references to testProcessor and so GC can begin.

    SpecialPowers.exactGC(function() {

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

      observer = null;

      event.target.onaudioprocess = null;

      ok(!ids.length, "All expected nodes should be collected");

      SimpleTest.finish();

});

    break;

};

function id(node) {

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

// Nodes with these ids should be collected.

var ids = [ id(testProcessor), id(delay), id(gain) ];

testProcessor = null;

delay = null;

gain = null;

</script>

</pre>

</body>

</html>