<!DOCTYPE html> <!-- webkit-test-runner [ internal:AsyncOverflowScrollingEnabled=true ] -->
<html>
<head>
    <style>
        body {
            height: 2000px;
        }
        .scroller {
            margin: 10px;
            left: 10px;
            height: 300px;
            width: 300px;
            border: 20px solid gray;
            padding: 5px;
            overflow: scroll;
        }
        .content {
        }
        
        .tiled {
            width: 4096px;
            height: 300px;
            animation: anim 10s linear;
        }
        
        @keyframes anim {
            from { transform: translateZ(0); }
            to   { transform: translateZ(10px); }
        }
        
    </style>
    <script src="../../../resources/js-test-pre.js"></script>
    <script src="../../../resources/ui-helper.js"></script>
    <script>
        var jsTestIsAsync = true;

        var overflowScrollEventCount = 0;

        async function hitTestScrolledContents()
        {
            await UIHelper.mouseWheelScrollAt(100, 100);
        }

        async function scrollTest()
        {
            description('This test should not assert');

            scroller = document.querySelector('.scroller');
            scroller.addEventListener('scroll', () => {
                ++overflowScrollEventCount;
            }, false);

            await hitTestScrolledContents();
            shouldBe('overflowScrollEventCount > 0', 'true');
            finishJSTest();
        }

        window.addEventListener('load', () => {
            setTimeout(scrollTest, 0);
        }, false);

        var successfullyParsed = true;
    </script>
</head>
<body>
    <div class="scroller">
        <div class="content">
            <div class="tiled">
                Tiled layer
            </div>
        </div>
    </div>
    <div id="console"></div>
    <script src="../../../resources/js-test-post.js"></script>
</body>
</html>