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