<!DOCTYPE html>
<html>
<head>
<style>
.scrollable_region {
    width: 680px;
}

.table td, .table th {
    padding: 2px;
}

.table th {
    height: 20px;
    text-align: left;
    font-weight: strong;
}

.table tr:nth-child(odd) {
    background: #f3f3f3;
}

.scrollable_select option:nth-child(odd) {
    background: #f3f3f3;
}

</style>
<script src="../../resources/js-test-pre.js"></script>
<script>
function onLoad() {
    window.addEventListener("scroll", onPageScroll);
    setupTopLevel();
}
</script>
</head>
<body onload="onLoad();">
<script>

var selectTarget;
var pageScrollPositionBefore;
var selectScrollPositionBefore;
var continueCount = 5;

function onPageScroll()
{
    if (document.scrollingElement.scrollTop >= 70)
        checkForScroll();
}

let didCheckForScroll = false;
function checkForScroll()
{
    if (didCheckForScroll)
        return;
    didCheckForScroll = true;

    // The select should not have scrolled at all.
    var pageScrollPositionAfter = document.scrollingElement.scrollTop;
    var selectScrollPositionAfter = selectTarget.scrollTop;

    if (selectScrollPositionBefore != selectScrollPositionAfter)
        testFailed("Select consumed wheel events.");
    else
        testPassed("Select did not receive wheel events.");

    if (window.internals) {
        document.getElementById('layers').innerText = internals.layerTreeAsText(document,
            internals.LAYER_TREE_INCLUDES_VISIBLE_RECTS | internals.LAYER_TREE_INCLUDES_TILE_CACHES);
    }

    testRunner.notifyDone();
}

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

    selectTarget = document.getElementById('target');

    selectScrollPositionBefore = selectTarget.scrollTop;

    // Scroll the #source until we reach the #target.
    var startPosX = Math.round(selectTarget.offsetLeft) + 20;
    var startPosY = Math.round(selectTarget.offsetTop) - 42;
    eventSender.mouseMoveTo(startPosX, startPosY);
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'began', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'changed', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'changed', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'ended', 'none');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -1, 'none', 'begin');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, -4, 'none', 'continue');
    eventSender.mouseScrollByWithWheelAndMomentumPhases(0, 0, 'none', 'end');
    eventSender.callAfterScrollingCompletes(() => {
        requestAnimationFrame(checkForScroll);
    });

    // We should finish via the scroll event; this will fire in the case of failure when the page doesn't scroll.
}

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

        eventSender.monitorWheelEvents();
        setTimeout(scrollTest, 0);
    } else {
        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/>"
            + "at the top of the page, and then use the mouse wheel or a two-finger swipe to scroll down<br/>"
            + "past the selectTarget.<br/><br/>"
            + "You should not see the 'content21' label if this test is successful.</p>";
        messageLocation.appendChild(message);
    }
}

</script>
<div id="parent" style="height: 2000px; width: 2000px;">
    <div id="source" style="height: 100px; width: 500px;">
        Put mouse here and flick downwards
    </div>
        <div class="scrollable_region">
            <h3>Scrollable Select</h3>
            <select id="target" class="scrollable_select" size="8">
                <option>content1</option>
                <option>content2</option>
                <option>content3</option>
                <option>content4</option>
                <option>content5</option>
                <option>content6</option>
                <option>content7</option>
                <option>content8</option>
                <option>content9</option>
                <option>content10</option>
                <option>content11</option>
                <option>content12</option>
                <option>content13</option>
                <option>content14</option>
                <option>content15</option>
                <option>content16</option>
                <option>content17</option>
                <option>content18</option>
                <option>content19</option>
                <option>content20</option>
                <option>content21</option>
            </select>
        </div>
    </div>
</div>
<div id="console"></div>
<script>
description("Tests that a select doesn't consume wheel events when scroll is latched to main frame.");
</script>
<pre id="layers">Layer tree goes here</p>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>