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<!doctype html>
<html>
<head>
<title>Adding a track to an inactive MediaStream</title>
<link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/>
<link rel="help" href="http://w3c.github.io/mediacapture-main/getusermedia.html#widl-MediaStream-addTrack-void-MediaStreamTrack-track">
<link rel="help" href="http://w3c.github.io/mediacapture-main/getusermedia.html#widl-MediaStreamTrack-stop-void">
</head>
<body>
<p class="instructions">When prompted, accept to share your audio stream, then
your video stream.</p>
<h1 class="instructions">Description</h1>
<p class="instructions">This test checks that adding a track to an inactive
MediaStream is allowed.</p>
<div id='log'></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=/resources/testdriver.js></script>
<script src=/resources/testdriver-vendor.js></script>
<script src=permission-helper.js></script>
<script>
promise_test(async () => {
await setMediaPermission();
const audio = await navigator.mediaDevices.getUserMedia({audio:true});
const video = await navigator.mediaDevices.getUserMedia({video:true});
audio.getAudioTracks()[0].stop();
assert_false(audio.active, "audio stream is inactive after stopping its only audio track");
assert_true(video.active, "video stream is active");
audio.addTrack(video.getVideoTracks()[0]);
audio.removeTrack(audio.getAudioTracks()[0]);
}, "Tests that adding a track to an inactive MediaStream is allowed");
</script>
</body>
</html>
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