MediaStreamTrack-clone.html | Explore in Territory

<!DOCTYPE HTML>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>

createTrack = function() {
  ac = new AudioContext();
  var osc = ac.createOscillator();
  var dest = ac.createMediaStreamDestination();
  osc.connect(dest);
  return dest.stream.getAudioTracks()[0];
}

test(t => {
  track = createTrack();
  var original_id = track.id;
  track_clone = track.clone();
  assert_not_equals(track.id, track_clone.id);
}, "Cloned MediaStreamTracks have new IDs");

test(t => {
  track = createTrack();
  assert_true(track.enabled);
  track.enabled = false;
  assert_false(track.enabled);

  track_clone = track.clone();
  assert_false(track_clone.enabled,
               "Clones of disabled tracks should still be disabled.");
  track_clone.enabled = true;
  assert_not_equals(track.enabled, track_clone.enabled,
                    "Tracks enabled status should not be linked.");
}, "Clones of disabled MediaStreamTracks are still disabled.");

test(t => {
  track = createTrack();
  assert_equals(track.readyState, "live");
  cloned_track1 = track.clone();
  assert_equals(cloned_track1.readyState, "live");
  track.stop();
  assert_equals(track.readyState, "ended");
  cloned_track2 = track.clone();
  assert_equals(cloned_track2.readyState, "ended");
  assert_equals(cloned_track1.readyState, "live");
}, "Cloned MediaStreamTracks have same states");

promise_test(function() {
  return navigator.mediaDevices.getUserMedia({audio: { echoCancellation: true }})
    .then(function(s) {
      track = s.getAudioTracks()[0];
      constraints = track.getConstraints();
      assert_equals(Object.keys(constraints).length, 1);
      assert_true(constraints.hasOwnProperty('echoCancellation'));
      assert_true(constraints.echoCancellation);
      cloned_track = track.clone();
      cloned_track_constraints = cloned_track.getConstraints();
      assert_equals(Object.keys(cloned_track_constraints).length, Object.keys(constraints).length);
      assert_true(constraints.hasOwnProperty('echoCancellation'));
      assert_equals(cloned_track_constraints.echoCancellation, constraints.echoCancellation);
    });
}, 'Cloned audio MediaStreamTrack has same constraints');

promise_test(function() {
  return navigator.mediaDevices.getUserMedia({video: { width: 800, height: 600 }})
    .then(function(s) {
      track = s.getVideoTracks()[0];
      constraints = track.getConstraints();
      assert_equals(Object.keys(constraints).length, 2);
      assert_true(constraints.hasOwnProperty('width'));
      assert_equals(constraints.width, 800);
      assert_true(constraints.hasOwnProperty('height'));
      assert_equals(constraints.height, 600);
      cloned_track = track.clone();
      cloned_track_constraints = cloned_track.getConstraints();
      assert_equals(Object.keys(cloned_track_constraints).length, Object.keys(constraints).length);
      assert_true(constraints.hasOwnProperty('width'));
      assert_equals(cloned_track_constraints.width, constraints.width);
      assert_true(constraints.hasOwnProperty('height'));
      assert_equals(cloned_track_constraints.height, constraints.height);
    });
}, 'Cloned video MediaStreamTrack has same constraints');

// TODO(pbos): Add tests that make sure muted and stopped properties are
// carried over. Part of crbug:669212.

</script>
chromium/third_party/blink/web_tests/fast/mediastream/MediaStreamTrack-clone.html
