cues.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/interfaces/TextTrack/cues.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>TextTrack.cues</title>

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<div id=log></div>

<script>

test(function(){

    var video = document.createElement('video');

    var t1 = video.addTextTrack('subtitles');

    assert_equals(t1.cues, t1.cues, 't1.cues should return same object');

    assert_not_equals(t1.cues, null, 't1.cues should not be null');

    assert_true(t1.cues instanceof TextTrackCueList, 't1.cues instanceof TextTrackCueList');

    assert_equals(t1.cues.length, 0, 't1.cues.length');

}, document.title+', empty list');

function addCue(texttrack, start, end, text, id) {

  var c = new VTTCue(start, end, text);

  c.id = id;

  texttrack.addCue(c);

  return c;

test(function(){

    var video = document.createElement('video');

    var t1 = video.addTextTrack('subtitles');

    var t1_cues = t1.cues;

    var c = addCue(t1, 0, 1, 'text', 'id');

    assert_equals(t1.cues, t1_cues, "t1.cues should return same object");

    assert_equals(t1.cues.length, 1, "t1.cues.length");

    var c2 = addCue(t1, 1, 2, 'text2', 'id2');

    assert_equals(t1.cues, t1_cues, "t1.cues should return the same object after adding a second cue");

    assert_equals(t1.cues.length, 2, "t1.cues.length after adding a second cue");

    assert_equals(t1.cues[0].id, "id");

    assert_equals(t1.cues[1].id, "id2");

}, document.title+', after addCue()');

test(function(){

    var video = document.createElement('video');

    var t1 = video.addTextTrack('subtitles');

    var t1_cues = t1.cues;

    var c = addCue(t1, 0, 1, 'text', 'id');

    var c2 = addCue(t1, 1, 2, 'text2', 'id2');

    t1.mode = 'showing';

    assert_equals(t1.cues, t1_cues, "t1.cues should return the same object after setting mode to 'showing'");

    t1.mode = 'hidden';

    assert_equals(t1.cues, t1_cues, "t1.cues should return the same object after setting mode to 'hidden'");

    t1.mode = 'disabled';

    assert_equals(t1.cues, null, "t1.cues should be null when mode is 'disabled'");

    assert_equals(t1_cues.length, 2, "t1_cues should still be intact after setting mode to 'disabled'");

    assert_equals(t1_cues[0].id, "id", "t1_cues first cue should still be intact after setting mode to 'disabled'");

    assert_equals(t1_cues[1].id, "id2", "t1_cues second cue should still be intact after setting mode to 'disabled'");

    t1.mode = 'hidden';

    assert_equals(t1.cues, t1_cues, "t1.cues should return the same object after setting mode to 'disabled' and then 'hidden'");

    t1.mode = 'disabled';

    assert_equals(t1.cues, null, "t1.cues should be null when mode is set to 'disabled' again");

    assert_equals(t1_cues.length, 2, "t1_cues should still be intact after setting mode to 'disabled' again");

    assert_equals(t1_cues[0].id, "id", "t1_cues first cue should still be intact after setting mode to 'disabled' again");

    assert_equals(t1_cues[1].id, "id2", "t1_cues second cue should still be intact after setting mode to 'disabled' again");

    t1.mode = 'showing';

    assert_equals(t1.cues, t1_cues, "t1.cues should return the same object after setting mode to 'disabled' and then 'showing'");

}, document.title+', different modes');

test(function(){

    var video = document.createElement('video');

    var t1 = video.addTextTrack('subtitles');

    var t1_cues = t1.cues;

    var c = addCue(t1, 0, 1, 'text', 'id');

    var c2 = addCue(t1, 1, 2, 'text2', 'id2');

    t1.mode = 'showing';

    t1.cues[1].startTime = 0; // this should change the text track cue order

    assert_equals(t1.cues[0].id, 'id2');

    assert_equals(t1.cues[1].id, 'id');

    t1.cues[0].startTime = 0.5; // this should change it back

    assert_equals(t1.cues[0].id, 'id');

    assert_equals(t1.cues[1].id, 'id2');

}, document.title+', changing order');

async_test(function(){

    var video = document.createElement('video');

    var t1 = video.addTextTrack('subtitles');

    var t1_cues = t1.cues;

    t1.mode = 'hidden';

    var track = document.createElement('track');

    track['default'] = true;

    video.appendChild(track); // queues a task to "honor user preferences...", media element event task source

    var t2 = track.track;

    assert_equals(t2.cues, null, 't2.cues should be null');

    // We need to wait until the "honor user preferences..." steps have run so we invoke play()

    // which queues an event with the same task source.

    video.onplay = this.step_func(function(){

        assert_equals(t2.cues, t2.cues, 't2.cues should return same object');

        assert_not_equals(t1.cues, t2.cues, 't1.cues and t2.cues should be different objects');

        assert_not_equals(t2.cues, null, 't2.cues should not be null');

        assert_true(t2.cues instanceof TextTrackCueList, 't2.cues instanceof TextTrackCueList');

        assert_equals(t2.cues.length, 0, 't2.cues should have length 0');

        this.done();

});

    video.play(); // queues a task to fire 'play', media element event task source

}, document.title+', default attribute');

</script>