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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>
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