forked from mirrors/gecko-dev
717d9a23ba
Backed out changeset e926364f5d4f (bug 1665713) Backed out changeset ad03f6f54321 (bug 1665713)
59 lines
1.8 KiB
HTML
59 lines
1.8 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<script type="application/javascript" src="mediaStreamPlayback.js"></script>
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</head>
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<body>
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<pre id="test">
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<script type="application/javascript">
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"use strict";
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createHTML({
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title: "MediaStreams can be garbage collected",
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bug: "1407542"
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});
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let SpecialStream = SpecialPowers.wrap(MediaStream);
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async function testGC(stream, numCopies, copy) {
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let startStreams = await SpecialStream.countUnderlyingStreams();
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let copies = new Array(numCopies).fill(0).map(() => copy(stream));
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ok(await SpecialStream.countUnderlyingStreams() > startStreams,
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"MediaStreamTrack constructor creates more underlying streams");
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copies = [];
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await new Promise(r => SpecialPowers.exactGC(r));
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is(await SpecialStream.countUnderlyingStreams(), startStreams,
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"MediaStreamTracks should have been collected");
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}
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runTest(async () => {
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// We do not need LoopbackTone because it is not used
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// and creates extra streams that affect the result
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DISABLE_LOOPBACK_TONE = true;
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let gUMStream = await getUserMedia({video: true});
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info("Testing GC of track-array constructor with cloned tracks");
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await testGC(gUMStream, 10, s => new MediaStream(s.getTracks().map(t => t.clone())));
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info("Testing GC of empty constructor plus addTrack with cloned tracks");
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await testGC(gUMStream, 10, s => {
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let s2 = new MediaStream();
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s.getTracks().forEach(t => s2.addTrack(t.clone()));
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return s2;
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});
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info("Testing GC of cloned stream");
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await testGC(gUMStream, 10, s => s.clone());
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info("Testing GC of gUM stream");
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gUMStream = null;
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await new Promise(r => SpecialPowers.exactGC(r));
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is(await SpecialStream.countUnderlyingStreams(), 0,
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"Original gUM stream should be collectable");
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});
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</script>
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</pre>
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</body>
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</html>
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