<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/ui-helper.js"></script>
</head>
<body>
<input id="test" type="checkbox"> <!-- Test PASSED if there is a focus ring -->
<script>
if (window.testRunner) {
    testRunner.waitUntilDone();
    let testElement = document.getElementById("test");
    testElement.addEventListener("focus", () => testRunner.notifyDone(), { once: true });
    UIHelper.keyDown("\t", ["altKey"]);
}
</script>
</body>
</html>