test_getUserMedia_getTrackById.html

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<head>

  <script type="application/javascript" src="mediaStreamPlayback.js"></script>

</head>

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<pre id="test">

<script type="application/javascript">

  createHTML({

    title: "Basic getTrackById test of gUM stream",

    bug: "1208390",

});

  runTest(() => {

    var constraints = {audio: true, video: true};

    return getUserMedia(constraints).then(stream => {

      is(stream.getTrackById(""), null,

         "getTrackById of non-matching string should return null");

      let audioTrack = stream.getAudioTracks()[0];

      is(stream.getTrackById(audioTrack.id), audioTrack,

         "getTrackById with matching id should return the track");

      let videoTrack = stream.getVideoTracks()[0];

      is(stream.getTrackById(videoTrack.id), videoTrack,

         "getTrackById with matching id should return the track");

      stream.removeTrack(audioTrack);

      is(stream.getTrackById(audioTrack.id), null,

         "getTrackById with id of removed track should return null");

      let newStream = new MediaStream();

      is(newStream.getTrackById(videoTrack.id), null,

         "getTrackById with id of track in other stream should return null");

      newStream.addTrack(audioTrack);

      is(newStream.getTrackById(audioTrack.id), audioTrack,

         "getTrackByid with matching id should return the track");

      newStream.addTrack(videoTrack);

      is(newStream.getTrackById(videoTrack.id), videoTrack,

         "getTrackByid with matching id should return the track");

      [audioTrack, videoTrack].forEach(t => t.stop());

});

});

</script>

</pre>

</body>

</html>