File: track-cue-negative-timestamp-events.html

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<!DOCTYPE html>
<title>Enter, Exit events for cues with negative timestamps</title>
<script src="/common/media.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<video>
  <script>
  async_test(function(t) {
    var video = document.querySelector("video");
    var track = video.addTextTrack("subtitles");

    // Add cue with negative startTime.
    var cue = new VTTCue(-10, 1, "Sausage?");
    track.addCue(cue);
    assert_equals(track.cues.length, 1);
    cue.onenter = t.step_func(function() {
      cue.onexit = t.step_func_done();
    });

    // Add cue with negative startTime and negative endTime.
    // This cue should never be active.
    var missedCue = new VTTCue(-110, -3.4, "Pepperoni?");
    track.addCue(missedCue);
    assert_equals(track.cues.length, 2);
    missedCue.onenter = t.unreached_func();
    missedCue.onexit = t.unreached_func();

    video.src = getVideoURI("/media/test");
    video.play();
  });
  </script>
</video>