<!DOCTYPE html> <!-- webkit-test-runner [ AsyncOverflowScrollingEnabled=true AsyncFrameScrollingEnabled=true ScrollAnimatorEnabled=true ] -->
<html>
<head>
    <script src="../../resources/ui-helper.js"></script>
    <script src="../../resources/js-test.js"></script>
    <meta name="viewport" content="initial-scale=1.5, user-scalable=no">
    <script>
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
        }

        function scrollRed()
        {
            let redOffset = document.getElementById('red-frame').contentDocument.defaultView.scrollY;
            let blueOffset = document.getElementById('blue-frame').contentDocument.defaultView.scrollY;
            if (redOffset > 1900) {
                if (blueOffset > 1900)
                    debug("FAIL: Blue frame scrolled as far as the red frame.");
                else
                    debug("SUCCESS: Blue frame stopped scolling before red frame");
                testRunner.notifyDone();
            }
        }

        async function runTest()
        {
            if (!window.testRunner || !testRunner.runUIScript)
                return;

            let blueFrame = document.getElementById('blue-frame');
            let redFrame = document.getElementById('red-frame');
            let redDocument = redFrame.contentDocument;

            redDocument.addEventListener("scroll", function () {
                scrollRed();
            });

            blueFrame.focus();
            await UIHelper.rawKeyDown("downArrow");
            redFrame.focus();
            await UIHelper.rawKeyDown("downArrow");
        }
    </script>
    <style>
    #placeholder {
        width: 100px;
        height: 5000px;
    }
    iframe {
        width: 100px;
        height: 100px;
    }
    </style>
</head>
<body style="margin: 0;" onload="runTest()">
    <iframe id="blue-frame" srcdoc="<div style='width: 100px; height: 2000px; background-color: blue;'></div>"></iframe>
    <iframe id="red-frame" srcdoc="<div style='width: 100px; height: 2000px; background-color: red;'></div>"></iframe>
    <div id="placeholder">
    <div id="console"></div>
</body>
</html>
