track-cues-seeking.html | Explore in Territory

<!DOCTYPE html>
<title>TextTrack's activeCues are indexed and updated during video playback</title>
<script src="/common/media.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<video>
    <track src="resources/cues-overlapping.vtt" kind="subtitles" default>
    <script>
    async_test(function(t) {
        var video = document.querySelector("video");
        var track = document.querySelector("track");
        track.onload = t.step_func(function() {
            assert_equals(track.track.cues.length, 3);
            video.src = getVideoURI("/media/test");
            video.currentTime = 0.5;
        });

        var seekedCount = 0;
        video.onseeked = t.step_func(function() {
            ++seekedCount;

            assert_equals(video.currentTime, seekedCount * 0.5);
            assert_equals(track.track.activeCues.length, seekedCount - 1);
            video.currentTime = (seekedCount + 1) * 0.5;

            if (seekedCount == 4)
                t.done();
        });
    });
    </script>
</video>

chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/media-elements/track/track-element/track-cues-seeking.html