<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true ] -->
<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            height: 2000px;
        }

        .scroller {
            margin: 10px;
            width: 500px;
            height: 400px;
            overflow: auto;
            border: 2px solid black;
        }
        
        .horizontal .scroller {
            width: 400px;
            height: 400px;
            margin: 10px;
        }
        
        .filler {
            height: 200px;
            width: 100%;
            margin: 10px;
            background-color: silver;
        }

        .horizontal .filler {
            height: 80%;
            width: 200%;
            background-color: silver;
        }
    </style>
    <script src="../../../resources/js-test-pre.js"></script>
    <script src="../../../resources/ui-helper.js"></script>
    <script>
        jsTestIsAsync = true;
        var outerScroller;
        var innerScroller;
        
        function checkForScroll()
        {
            debug('After scrolll');
            shouldBe('outerScroller.scrollTop', '210');
            shouldBe('innerScroller.scrollTop', '0');

            finishJSTest();
        }

        async function scrollTest()
        {
            outerScroller = document.getElementById('outer');
            innerScroller = document.getElementById('inner');
            
            debug('Initial state');
            shouldBe('outerScroller.scrollTop', '0');
            shouldBe('innerScroller.scrollTop', '0');

            if (!window.eventSender) {
                finishJSTest();
                return;
            }

            await UIHelper.startMonitoringWheelEvents();
            eventSender.mouseMoveTo(150, 300); // Over the horizontally scrollable overflow.
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, "began", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, "changed", "none");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -10, "none", "continue");
            eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, "none", "end");
            await UIHelper.waitForScrollCompletion();
            checkForScroll();
        }

        window.addEventListener('load', () => {
            setTimeout(scrollTest, 0);
        }, false);
    </script>
</head>
<body>
    <div id="outer" class="scroller">
        <div class="filler">Scrolls vertically</div>
        <div id="inner" class="horizontal scroller">
            <div class="filler">Scrolls horizontally</div>
        </div>
        <div class="filler"></div>
    </div>
    <div id="console"></div>
    <script src="../../../resources/js-test-post.js"></script>
</body>
</html>
