<!DOCTYPE html>

<html>
<head>
    <style>
        #scrolling {
            height: 300px;
            width: 300px;
            border: 1px solid black;
            overflow-y: scroll;
        }
        
        .content {
            height: 600px;
            width: 100%;
            background-image: linear-gradient(silver, gray);
        }
    </style>
    <script>
        function checkForScroll()
        {
            var scroller = document.getElementById("scrolling");
            var expectedScrollTop = 300;
            
            if (scroller.scrollTop == expectedScrollTop)
                document.getElementById('result').textContent = "PASS: scrollTop was " + expectedScrollTop;
            else
                document.getElementById('result').textContent = "FAIL: scrollTop was " + scroller.scrollTop;

            testRunner.notifyDone();
        }
        
        function scrollTest()
        {
            eventSender.mouseMoveTo(20, 20);
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, "began", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "changed", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "changed", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, "changed", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, "ended", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "none", "begin");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "none", "continue");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "none", "continue");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "none", "continue");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "none", "continue");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -100, "none", "continue");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, "none", "end");
            eventSender.callAfterScrollingCompletes(checkForScroll);
        }

        function startTest()
        {
            if (window.eventSender) {
                testRunner.dumpAsText();
                testRunner.waitUntilDone();

                eventSender.monitorWheelEvents();
                setTimeout(scrollTest, 0);
            }
        }
        
        window.addEventListener('load', startTest, false);
    </script>
</head>
<body>
<div id="scrolling">
    <div class="content"></div>
</div>
<div id="result"></div>
</body>
</html>