track-cue-negative-duration.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/track/track-element/track-cue-negative-duration.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Enter, Exit events for a cue with negative duration</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 a cue with negative duration.

    var cue = new VTTCue(1, -10, "Sausage?");

    track.addCue(cue);

    assert_equals(track.cues.length, 1);

    // Verify that enter and exit events are fired.

    var enterEvent = false;

    cue.onenter = t.step_func(function() {

      enterEvent = true;

});

    cue.onexit = t.step_func_done(function() {

      assert_true(enterEvent);

});

    video.src = getVideoURI("/media/test");

    video.play();

});

  </script>

</video>