<!DOCTYPE html>
<html>
<head>
    <script>
        function seekToBeginningAndFinishTest() {
            document.querySelector("#test-video").currentTime = 0;
            // The media controls should be updated on the next runloop.
            setTimeout(function() {
                window.webkit.messageHandlers.testHandler.postMessage("ended");
            }, 0);
        }

        function seekToEnd() {
            document.querySelector("#test-video").currentTime = document.querySelector("#test-video").duration - 0.1;
        }
    </script>
</head>
<body>
    <video id="test-video" autoplay onended=seekToBeginningAndFinishTest() onplaying=seekToEnd() style="width: 800px; height: 600px;" src="large-video-with-audio.mp4"></video>
</body>
</html>