LayoutTests/media/video-preload.html

<!DOCTYPE HTML>

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

        <script>
            var timer = null;
            var movieInfo = 
            {
                current : -1,
                movies : 
                [ 
                    {
                        // should not buffer, 'preload' is 'none'
                        preload : "none",
                        shouldBuffer : false,
                        autoPlay : false,
                        description : "until 'play()' is called", 
                    },
                    {
                        preload : "metadata",
                        shouldBuffer : true,
                        autoPlay : false,
                        description : "", 
                    },
                    {
                        preload : "auto",
                        shouldBuffer : true,
                        autoPlay : false,
                        description : "", 
                    },
                    {
                        // should buffer because 'autoplay' is set
                        preload : "none",
                        shouldBuffer : true,
                        autoPlay : true,
                        description : " because of 'autoplay'", 
                    },
                ]
            };
            var timer = null;

            function checkLoad()
            {
                var movie = movieInfo.movies[movieInfo.current];

                logResult(true, "did not buffer automatically");
                
                // start playback, which should force data to load
                movie.shouldBuffer = true;
                run("video.play()");
            }

            function loadedmetadata()
            {
                var movie = movieInfo.movies[movieInfo.current];

                clearTimeout(timer);
                logResult(movie.shouldBuffer, "buffered automatically");
                openNextMovie();
            }

            function setupAttribute(attr, value)
            {
                if (value)
                    run("video.setAttribute('" + attr + "', '" + value + "')");
                else
                    run("video.removeAttribute('" + attr + "')");
            }

            function openNextMovie()
            {
                consoleWrite("");

                movieInfo.current++;
                if (movieInfo.current >= movieInfo.movies.length)
                {
                    endTest();
                    return;
                }

                var movie = movieInfo.movies[movieInfo.current];
                var url = findMediaFile("video", "content/test");
                var desc = "Will load with <em>'preload=" + movie.preload + "'</em>"
                            + ", <b>should" + (movie.shouldBuffer ? "" : " not") + " </b> buffer automatically "
                            + movie.description;
                consoleWrite(desc);

                setupAttribute('preload', movie.preload);
                setupAttribute('autoplay', movie.autoPlay);

                video.src = url;
                if (movieInfo.current > 0)
                    video.load();
                if (!movie.shouldBuffer)
                    timer = setTimeout(checkLoad, 200);
            }
            
            function start()
            {
                findMediaElement();

                waitForEvent("error");
                waitForEvent("loadstart");
                waitForEvent("play");
                waitForEvent('loadedmetadata', loadedmetadata);
            
                openNextMovie();
            }

        </script>
    </head>

    <body onload="start()">
        <p>Test to see if media loads automatically when 'preload' is specified.</p>
        <video controls ></video>
    </body>
</html>