LayoutTests/fast/events/option-tab.html

<p>This tests that option-tab moves you from a text field to a link, but plain old tab does not.</p>
<p>Note: Option is the Mac name for what other platforms call Alt.</p>
<input id="textField" type=text> <a onfocus="window.linkFocused = true" href="http://www.apple.com">link</a>
<input id="searchField" type=search> <a onfocus="window.linkFocused = true" href="http://www.apple.com">link</a>
<pre id="console">
</pre>
<script>

if (window.testRunner)
    testRunner.dumpAsText();

function test(fieldId)
{
    window.linkFocused = false;
    document.getElementById(fieldId).focus();
    var event = document.createEvent("KeyboardEvents");
    event.initKeyboardEvent("keydown", true, true, document.defaultView, "U+0009", 0, false, true, false, false, false);
    document.getElementById(fieldId).dispatchEvent(event);
    if (window.linkFocused)
        document.getElementById("console").innerHTML += "SUCCESS: Option-tab did tab to the link (" + fieldId + ").\n";
    else
        document.getElementById("console").innerHTML += "FAIL: Option-tab did not tab to the link (" + fieldId + ").\n";

    window.linkFocused = false;
    document.getElementById(fieldId).focus();
    event = document.createEvent("KeyboardEvents");
    event.initKeyboardEvent("keydown", true, true, document.defaultView, "U+0009", 0, false, false, false, false, false);
    document.getElementById(fieldId).dispatchEvent(event);
    if (window.linkFocused)
        document.getElementById("console").innerHTML += "FAIL: Plain old tab did tab to the link (" + fieldId + ").\n";
    else
        document.getElementById("console").innerHTML += "SUCCESS: Plain old tab did not tab to the link (" + fieldId + ").\n";
}

test("textField");
test("searchField");

</script>