tor-browser

The Tor Browser
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test_mediatrack_consuming_mediastream.html (4083B)

      1 <!DOCTYPE HTML>
      2 <html>
      3 <head>
      4  <title>Test track interfaces when consuming a MediaStream from gUM</title>
      5  <script src="/tests/SimpleTest/SimpleTest.js"></script>
      6  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
      7  <script type="text/javascript" src="manifest.js"></script>
      8  <script type="text/javascript" src="gUM_support.js"></script>
      9 </head>
     10 <body>
     11 <pre id="test">
     12 <script class="testbody" type="text/javascript">
     13 async function startTest() {
     14  let steps = 0;
     15  let audioOnchange = 0;
     16  let audioOnaddtrack = 0;
     17  let videoOnchange = 0;
     18  let videoOnaddtrack = 0;
     19  let isPlaying = false;
     20  let element = document.createElement("video");
     21  let stream;
     22  try {
     23    await setupGetUserMediaTestPrefs();
     24    stream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
     25  } catch (err) {
     26    ok(false, 'Unexpected error fired with: ' + err);
     27    SimpleTest.finish();
     28    return;
     29  }
     30 
     31  element.audioTracks.onaddtrack = function() {
     32    audioOnaddtrack++;
     33  };
     34 
     35  element.audioTracks.onchange = function() {
     36    audioOnchange++;
     37  };
     38 
     39  element.videoTracks.onaddtrack = function() {
     40    videoOnaddtrack++;
     41  };
     42 
     43  element.videoTracks.onchange = function() {
     44    videoOnchange++;
     45  };
     46 
     47  function checkTrackRemoved() {
     48    if (isPlaying) {
     49      is(element.audioTracks.length, 0, 'The length of audioTracks should be 0.');
     50      is(element.videoTracks.length, 0, 'The length of videoTracks should be 0.');
     51    }
     52  }
     53 
     54  element.onended = function() {
     55    ok(true, 'Event ended is expected to be fired on element.');
     56    checkTrackRemoved();
     57    element.onended = null;
     58    element.onplaying = null;
     59    element.onpause = null;
     60    SimpleTest.finish();
     61  }
     62 
     63  function checkTrackAdded() {
     64    isPlaying = true;
     65    is(audioOnaddtrack, 1, 'Calls of onaddtrack on audioTracks should be 1.');
     66    is(element.audioTracks.length, 1, 'The length of audioTracks should be 1.');
     67    ok(element.audioTracks[0].enabled, 'Audio track should be enabled as default.');
     68    is(videoOnaddtrack, 1, 'Calls of onaddtrack on videoTracks should be 1.');
     69    is(element.videoTracks.length, 1, 'The length of videoTracks should be 1.');
     70    is(element.videoTracks.selectedIndex, 0,
     71        'The first video track is set selected as default.');
     72  }
     73 
     74  function setTrackEnabled(enabled) {
     75    element.audioTracks[0].enabled = enabled;
     76    element.videoTracks[0].selected = enabled;
     77  }
     78 
     79  function checkTrackChanged(calls, enabled) {
     80    is(audioOnchange, calls, 'Calls of onchange on audioTracks should be '+calls);
     81    is(element.audioTracks[0].enabled, enabled,
     82        'Enabled value of the audio track should be ' +enabled);
     83    is(videoOnchange, calls, 'Calls of onchange on videoTracks should be '+calls);
     84    is(element.videoTracks[0].selected, enabled,
     85        'Selected value of the video track should be ' +enabled);
     86    var index = enabled ? 0 : -1;
     87    is(element.videoTracks.selectedIndex, index,
     88        'SelectedIndex of video tracks should be ' +index);
     89  }
     90 
     91  function onpause() {
     92    element.onpause = null;
     93    if (element.ended) {
     94      return;
     95    }
     96    if (steps == 1) {
     97      setTrackEnabled(false);
     98      element.onplaying = onplaying;
     99      element.play();
    100      steps++;
    101    } else if (steps == 2) {
    102      setTrackEnabled(true);
    103      element.onplaying = onplaying;
    104      element.play();
    105      steps++;
    106    }
    107  }
    108 
    109  function onplaying() {
    110    element.onplaying = null;
    111    if (element.ended) {
    112      return;
    113    }
    114    if (steps == 1) {
    115      element.onpause = onpause;
    116      element.pause();
    117      checkTrackAdded();
    118    } else if (steps == 2) {
    119      element.onpause = onpause;
    120      element.pause();
    121      checkTrackChanged(1, false);
    122    } else if (steps == 3) {
    123      checkTrackChanged(2, true);
    124      stream.getTracks().forEach(t => t.stop());
    125    }
    126  }
    127 
    128  element.onplaying = onplaying;
    129  element.srcObject = stream;
    130 
    131  steps++;
    132  await element.play();
    133 }
    134 
    135 SimpleTest.waitForExplicitFinish();
    136 SpecialPowers.pushPrefEnv(
    137  {
    138    "set": [
    139      ["media.track.enabled", true]
    140    ]
    141  }, startTest);
    142 
    143 </script>
    144 </pre>
    145 </body>
    146 </html>