test_cloneElementVisually_mediastream.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <title>Test cloneElementVisually</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script type="application/javascript" src="https://example.com:443/tests/dom/media/test/cloneElementVisually_helpers.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">

</head>

<body>

<div id="content">

  <h1>Original</h1>

  <video id="original"></video>

  <h1>MediaStream</h1>

  <video id="streamTarget"></video>

  <h1>Clone</h1>

</div>

<div id="results">

  <h1>Results</h1>

  <canvas id="left"></canvas>

  <canvas id="right"></canvas>

</div>

<script type="application/javascript">

/* import-globals-from cloneElementVisually_helpers.js */

/**

 * Test that we can clone a video that is playing a MediaStream.

*/

add_task(async () => {

  await setup();

  let originalVideo = document.getElementById("original");

  let stream = originalVideo.mozCaptureStream();

  let streamTarget = document.getElementById("streamTarget");

  originalVideo.setAttribute("loop", true);

  let playingPromise = waitForEventOnce(originalVideo, "playing");

  await originalVideo.play();

  await playingPromise;

  streamTarget.srcObject = stream;

  playingPromise = waitForEventOnce(streamTarget, "playing");

  await streamTarget.play();

  await playingPromise

  await withNewClone(originalVideo, async clone => {

    await SpecialPowers.wrap(streamTarget).cloneElementVisually(clone);

    originalVideo.loop = false;

    originalVideo.currentTime = originalVideo.duration - 0.1;

    await waitForEventOnce(streamTarget, "ended");

    ok(await assertVideosMatch(originalVideo, streamTarget),

       "Should match Original video");

    ok(await assertVideosMatch(streamTarget, clone),

       "Should match MediaStream");

});

  // Capturing a stream from a video "taints" it which prevents testing

  // shutdown decoder behaviour. To avoid interfering with future tests,

  // we replace the video.

  let newVideo = originalVideo.cloneNode();

  originalVideo.parentNode.replaceChild(newVideo, originalVideo);

});

</script>

</body>

</html>