<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

        <script src=../media-file.js></script>
        <script src=../video-test.js></script>
        <script>

            function trackAdded()
            {
                consoleWrite("EVENT(" + event.type + ")");
                consoleWrite("<i>**check that metadata track state has not changed<" + "/i>");
                testExpected("track1.readyState", HTMLTrackElement.LOADED);
                testExpected("track1.track.mode", "hidden");
                consoleWrite("<i>**and that the caption track state has not changed<" + "/i>");
                testExpected("track2.readyState", HTMLTrackElement.LOADED);
                testExpected("track2.track.mode", "showing");
                consoleWrite("<i>**and that the subtitle track state is correct<" + "/i>");
                testExpected("event.target", video.textTracks);
                testExpected("event instanceof window.TrackEvent", true);
                testExpected("event.track", video.textTracks[video.textTracks.length - 1]);
                testExpected("track3.mode", "showing");

                consoleWrite("");
                endTest();
            }

            function captionsTrackLoaded()
            {
                consoleWrite("EVENT(load) -- &lt;track kind='captions' &gt;");
                consoleWrite("<i>**check that metadata track state has not changed<" + "/i>");
                testExpected("track1.readyState", HTMLTrackElement.LOADED);
                testExpected("track1.track.mode", "hidden");
                consoleWrite("<i>**and that the caption track state is correct<" + "/i>");
                testExpected("track2.readyState", HTMLTrackElement.LOADED);
                testExpected("track2.track.mode", "showing");
                consoleWrite("");

                video.textTracks.addEventListener("addtrack", trackAdded);
                consoleWrite("<i>**add a subtitle track with video.addTextTrack()<" + "/i>");
                run("track3 = video.addTextTrack('subtitles', 'Subtitle Track', 'en')");
                run("track3.mode = 'showing'");

                consoleWrite("");
            }

            function metadataTrackLoaded()
            {
                consoleWrite("EVENT(load) -- &lt;track kind='metadata' &gt;");
                consoleWrite("<i>**check metadata track state<" + "/i>");
                testExpected("track1.readyState", HTMLTrackElement.LOADED);
                testExpected("track1.track.mode", "hidden");
                testExpected("track1.track.cues.length", 12);
                testExpected("track1.track.cues[11].startTime", 22);

                consoleWrite("<br><i>**add a caption track, configured to load automatically<" + "/i>");
                run("track2 = document.createElement('track')");
                run("track2.setAttribute('kind', 'captions')");
                run("track2.setAttribute('default', 'default')");
                run("track2.setAttribute('onload', 'captionsTrackLoaded()')");
                run("track2.setAttribute('src', 'captions-webvtt/tc004-webvtt-file.vtt')");
                run("video.appendChild(track2)");

                consoleWrite("");
            }

            function canplaythrough()
            {
                consoleWrite("EVENT(canplaythrough) -- &lt;video&gt;");
                consoleWrite("<i>**check initial metadata track state<" + "/i>");
                testExpected("track1.readyState", HTMLTrackElement.NONE);
                testExpected("track1.track.mode", "disabled");
                testExpected("track1.track.cues", null);
                run("track1.track.mode = 'hidden'");
                consoleWrite("");
            }

            function start()
            {
                if (window.internals)
                    run("internals.setCaptionDisplayMode('Automatic')");

                consoleWrite("<br>EVENT(load) -- &lt;body&gt;");
                findMediaElement();

                track1 = document.querySelectorAll('track')[0]; 
                testExpected("track1.readyState", HTMLTrackElement.NONE);
                testExpected("track1.track.mode", "disabled");

                video.src = findMediaFile("video", "../content/test");
                consoleWrite("");
            }
        </script>
    </head>

    <body onload="start()">
        <p>Tests that a track appended after the initial track configuration does not change other tracks.</p>
        <video oncanplaythrough="canplaythrough()" > 
            <track kind="metadata" src="captions-webvtt/metadata.vtt" onload="metadataTrackLoaded()">
        </video>
    </body>
</html>