video-preload.html | Explore in Territory

<!DOCTYPE html>
<title>Test media loading behaviour with different "preload" values.</title>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script>
var movies = [
    // should not buffer, "preload" is "none".
    { preload: "none", shouldBuffer: false, autoPlay: false },
    // should buffer because "autoplay" is set.
    { preload: "none", shouldBuffer: true, autoPlay: true },
    // should buffer, because load() is called.
    { preload: "none", shouldBuffer: true, autoPlay: false, load: "" },
    // should buffer, because play() is called.
    { preload: "none", shouldBuffer: true, autoPlay: false, play: "" },
    // should buffer because "preload" is "metadata".
    { preload: "metadata", shouldBuffer: true, autoPlay: false },
    // should buffer because "preload" is "auto".
    { preload: "auto", shouldBuffer: true, autoPlay: false }
];

for (var movie of movies) {
    async_test(function(t) {
        var video = document.createElement("video");
        video.onerror = t.step_func(function() {});
        video.onloadstart = t.step_func(function() {});
        video.onplay = t.step_func(function() {});

        video.onloadedmetadata = t.step_func_done(function() {
            assert_true(movie.shouldBuffer);
        });

        setupAttribute("preload", movie.preload);
        setupAttribute("autoplay", movie.autoPlay);
        video.src = "content/test.ogv";

        if (movie.hasOwnProperty("play"))
            video.play();
        else if (movie.hasOwnProperty("load"))
            video.load();

        if (!movie.shouldBuffer) {
            setTimeout(function() {
                // start playback, which should force data to load.
                movie.shouldBuffer = true;
                video.play();
            }, 200);
        }

        function setupAttribute(attr, value) {
            if (value)
                video.setAttribute(attr, value);
            else
                video.removeAttribute(attr);
        }
    });
}
</script>
chromium/third_party/blink/web_tests/media/video-preload.html
