chromium/third_party/blink/web_tests/fast/forms/access-key-case-insensitive.html

<!DOCTYPE html>
<html>
<head>
<title>Case insensitiveness of accesskey attribute</title>
<script src="../../resources/js-test.js"></script>
</head>
</head>
<body>
<script>
description('Access key should work case-insensitively. To test this manually, press &lt;alt&gt;+a, &lt;alt&gt;+&lt;shift&gt;+b and &lt;alt&gt;+&lt;shift&gt;+c keys in this order (on Mac OS X, press &lt;ctrl&gt;+&lt;opt&gt; instead of &lt;alt&gt;).');

window.jsTestIsAsync = true;

function isUpperCase(string)
{
    return string === string.toUpperCase();
}

function pressKey(key)
{
    var modifiers;
    if (navigator.userAgent.search(/\bMac OS X\b/) !== -1)
        modifiers = ["ctrlKey", "altKey"];
    else
        modifiers = ["altKey"];

    if (isUpperCase(key)) {
        modifiers.push("shiftKey");
        key = key.toLowerCase();
    }

    if (window.eventSender)
        eventSender.keyDown(key, modifiers);
}

document.addEventListener("DOMContentLoaded", function () {
    var input = document.createElement('input');
    input.accessKey = 'A';
    input.onfocus = function () {
        testPassed('Pressing the "a" access key triggered a focus event.');
        input.blur();
        input.accessKey = 'b';
        input.onfocus = function () {
            testPassed('Pressing the "B" access key triggered a focus event.');
            input.blur();
            input.setAttribute('accesskey', 'C');
            input.onfocus = function () {
                testPassed('Pressing the "C" access key triggered a focus event.');
                document.body.removeChild(input);
                finishJSTest();
            };
            pressKey('C');
        };
        pressKey('B');
    };
    document.body.appendChild(input);
    pressKey('a');
});
</script>
</body>
</html>