chromium/third_party/blink/web_tests/accessibility/duplicate-child-nodes.html

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../resources/js-test.js"></script>
</head>
<body>

<em><code ><h4 ></em>

<p id="description"></p>
<div id="console"></div>

<script>
    description("Child nodes should not be duplicated in the accessibility tree.");

    if (window.accessibilityController) {
        document.body.focus();
        var webArea = accessibilityController.focusedElement;
        if (webArea.childrenCount > 1)
            shouldBe("webArea.childAtIndex(0).isEqual(webArea.childAtIndex(1))", "false");
    }

</script>

</body>
</html>