track-cue-negative-timestamp.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-timestamp.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Negative timestamps</title>

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

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

<video>

    <track src="resources/settings.vtt" default>

    <script>

    async_test(function(t) {

        var testTrack = document.querySelector("track");

        testTrack.onload = t.step_func_done(function() {

            var cues = testTrack.track.cues;

            assert_equals(testTrack.track.cues.length, 4);

            // Add cue with negative startTime.

            var cue = new VTTCue(-3439332606, 3.4, "Sausage?");

            testTrack.track.addCue(cue);

            assert_equals(cues.length, 5);

            // Add cue with negative startTime and negative endTime.

            cue = new VTTCue(-110, -3.4, "Pepperoni?");

            testTrack.track.addCue(cue);

            assert_equals(cues.length, 6);

            // Set startTime and endTime to negative values.

            var testCue = cues[2];

            assert_equals(testCue.startTime, 0);

            testCue.startTime = -5;

            assert_equals(testCue.startTime, -5);

            assert_equals(testCue.endTime, 30.5);

            testCue.endTime = -3439332606;

            assert_equals(testCue.endTime, -3439332606);

            // Check negative cues ordering.

            testCue = cues[3];

            assert_equals(testCue.startTime, 31);

            testCue.startTime = -200;

            // Verify that this cue is moved to 2nd position.

            assert_equals(cues[1].startTime, -200);

});

});

    </script>

</video>