<!DOCTYPE html>
<html>
<head>
<style>
body {
    height: 1200px;
}

.post {
    width: 500px;
    height: 600px;
    overflow: auto;
    border: 1px solid black;
}

.content {
    width: 1000px;
    height: 100%;
    background-image: repeating-linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.2) 100px), repeating-linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.2) 100px);
    
}
</style>
<script src="../../../resources/js-test-pre.js"></script>
<script>
    jsTestIsAsync = true;

    var divTarget;
    var pageScrollPositionBefore;
    var divScrollPositionBefore;

    function checkForScroll()
    {
        var pageScrollPositionAfter = document.scrollingElement.scrollTop;
        var divScrollPositionAfter = divTarget.scrollLeft;

        if (pageScrollPositionBefore != pageScrollPositionAfter)
            testPassed("Page received wheel events.");
        else
            testFailed("Page did not receive wheel events.");

        finishJSTest();
    }

    function scrollTest()
    {
        pageScrollPositionBefore = document.scrollingElement.scrollTop;

        divTarget = document.getElementById('parent');

        divScrollPositionBefore = divTarget.scrollLeft;

        var startPosX = divTarget.offsetLeft + 20;
        var startPosY = divTarget.offsetTop + (divTarget.clientHeight / 2); // One wheel turn before end.
        eventSender.mouseMoveTo(startPosX, startPosY); // Make sure we are just outside the iFrame

        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 1, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 1, 'none', 'none');

        eventSender.mouseScrollByWithWheelAndMomentumPhases(-1, 0, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(-1, 0, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(-1, 0, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(-1, 0, 'none', 'none');

        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'none');
        eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'none');

        setTimeout(checkForScroll, 100);
    }

    function setupTopLevel()
    {
        description("Tests that scroll events of type 'none' work properly.");
        if (window.eventSender) {
            setTimeout(scrollTest, 0);
            return;
        }

        var messageLocation = document.getElementById('parent');
        var message = document.createElement('div');
        message.innerHTML = "<p>This test is better run under DumpRenderTree. To manually test it, place the mouse pointer<br/>"
            + "inside the textured region. (1) Use the mouse wheel to scroll vertically, then (2) hold the shift key while<br/>"
            + "moving the mouse wheel to scroll horizontally, then (3) release the shift key and attempt to scroll vertically.<br/><br/>"
            + "The final set of vertical moves should modify the parent page scroll position.</p>";
        messageLocation.appendChild(message);
        finishJSTest();
    }

    window.addEventListener('load', () => {
        setupTopLevel();
    }, false);
</script>
</head>
<body>
    <div id="parent" class="post">
        <div id="target" class="content">
            Test region.
        </div>
    </div>
</div>
<div id="console"></div>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>