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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test WeakRefs with DOM wrappers that get cycle collected</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="application/javascript">
let weakrefs = [];
function go() {
SimpleTest.waitForExplicitFinish();
// 1. nsISupports-derived object.
let doc = document.implementation.createHTMLDocument();
weakrefs.push(new WeakRef(doc));
// 2. non-nsISupports-derived object.
let buffer = new AudioBuffer({length: 1, sampleRate: 8000});
weakrefs.push(new WeakRef(buffer));
// 3. nsISupports non-wrapper-cached object.
let image = new ImageData(1, 1);
weakrefs.push(new WeakRef(image));
// 4. non-nsISupports non-wrapper-cached object.
let iterator = document.fonts.values();
weakrefs.push(new WeakRef(iterator));
for (let wr of weakrefs) {
isnot(wr.deref(), undefined, "Check that live wrapper is returned");
}
// setTimeout will call its callback in a new task.
setTimeout(task2, 0);
}
function task2() {
// Trigger a GC and CC to collect the DOM objects, but no GC to
// collect the wrappers.
SpecialPowers.DOMWindowUtils.garbageCollect();
SpecialPowers.DOMWindowUtils.cycleCollect();
for (let wr of weakrefs) {
is(wr.deref(), undefined, "Check that stale wrapper is not exposed");
}
SimpleTest.finish();
}
</script>
</head>
<body onload="go()"></body>
</html>
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