<!DOCTYPE html>
<html>
<head>
    <style>
        body {
            height: 5000px;
        }
        
        #target {
            width: 200px;
            height: 200px;
            background-color: silver;
            margin: 20px;
        }
    </style>
    <script src="../../../resources/js-test-pre.js"></script>
    <script src="../../../resources/ui-helper.js"></script>
    <script>
        var jsTestIsAsync = true;

        let isFirst = true;
        let windowScrollEventCount = 0;
        let wasCancelable;
        let wasCanceled;

        async function testScroll()
        {
            await UIHelper.mouseWheelScrollAt(100, 100);
            shouldBeTrue('windowScrollEventCount > 0');

            shouldBeFalse('wasCancelable');
            shouldBeFalse('wasCanceled');

            finishJSTest();
        }

        window.addEventListener('load', () => {
            debug('Tests that wheel events in the passive region are non-cancelable')
            let target = document.getElementById('target');

            target.addEventListener('wheel', (event) => {
                if (isFirst) {
                    wasCancelable = event.cancelable;
                    event.preventDefault();
                    wasCanceled = event.defaultPrevented;
                    isFirst = false;
                }
                
            }, { passive: true });

            window.addEventListener('scroll', () => {
                ++windowScrollEventCount;
            }, false);

            setTimeout(testScroll, 0);
        }, false);
    </script>
</head>
<body>
    <div id="target"></div>
    <div id="console"></div>
    <script src="../../../resources/js-test-post.js"></script>
</body>
</html>