<!DOCTYPE html>
<html>
<head>
    <script>
        if (window.internals)
            internals.setMockMediaPlaybackTargetPickerEnabled(true);

        document.addEventListener('keydown', nextstep);

        function startTest() {
            var video = document.querySelector('video');
            video.addEventListener('playing', onplaying);
            video.addEventListener('pause', onpause);
            video.addEventListener('webkitcurrentplaybacktargetiswirelesschanged', oncurrentplaybacktargetiswirelesschanged);
            window.location = 'callback:loaded';
        }

        function onplaying(event) {
            var video = event.target;
            window.location = 'callback:playing';
        }

        function onpause(event) {
            var video = event.target;
            window.location = 'callback:paused';
        }

        function oncurrentplaybacktargetiswirelesschanged(event) {
            var video = event.target;
            window.location = video.webkitCurrentPlaybackTargetIsWireless ? 'callback:remote-start' : 'callback:remote-end';
        }

        function nextstep() {
            var video = document.querySelector('video');
            if (!video.webkitCurrentPlaybackTargetIsWireless) {
                if (video.paused)
                    video.play();
                else {
                    video.webkitShowPlaybackTargetPicker();
                    if (window.internals)
                        internals.setMockMediaPlaybackTargetPickerState('Sleepy TV', 'DeviceAvailable');
                }
            } else {
                if (!video.paused)
                    video.pause();
                else {
                    video.webkitShowPlaybackTargetPicker();
                    if (window.internals)
                        internals.setMockMediaPlaybackTargetPickerState('Sleepy TV', 'DeviceUnavailable');
                }
            }
        }

        window.addEventListener('load', startTest);
    </script>
</head>
<body>
    <video src="video-with-audio.mp4"></video>
</body>
</html>