<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            height: 2000px;
        }
        .fixed {
            position: fixed;
            width: 100%;
            height: 100px;
            background-color: green;
        }
        
        .top {
            top: 0;
        }
        .bottom {
            bottom: 0;
        }
    </style>
    <script src="../../resources/ui-helper.js"></script>
    <script>
        async function scrollTest()
        {
            const events = [
                {
                    type : "wheel",
                    viewX : 20,
                    viewY : 20,
                    deltaY : -10,
                    phase : "began"
                },
                {
                    type : "wheel",
                    deltaY : -1000,
                    phase : "changed"
                },
                {
                    type : "wheel",
                    phase : "ended"
                },
                {
                    type : "wheel",
                    deltaY : -1000,
                    momentumPhase : "began"
                },
                {
                    type : "wheel",
                    deltaY : -1000,
                    momentumPhase : "changed"
                },
                {
                    type : "wheel",
                    momentumPhase : "ended"
                }
            ];

            await UIHelper.mouseWheelSequence({ events: events });
            testRunner.notifyDone();
        }

        function startTest()
        {
            if (window.eventSender) {
                testRunner.waitUntilDone();
                setTimeout(scrollTest, 0);
            }
        }
        
        window.addEventListener('load', startTest, false);
    </script>
</head>
<body>
    <div class="fixed top"></div>
    <div class="fixed bottom"></div>
</body>
</html>