chromium/third_party/blink/web_tests/fast/forms/text/textfield-inside-anchor.html

<html>
    <head>
        <script>
            function log(msg)
            {
                document.getElementById('console').appendChild(document.createTextNode(msg + '\n'));
            }
            function test()
            {
                if (window.testRunner)
                    testRunner.dumpAsText();

                var tf = document.getElementById('tf');
                if (window.eventSender) {
                    eventSender.mouseMoveTo(10, tf.offsetTop + 3);
                    eventSender.mouseDown();
                    eventSender.mouseUp();
                }

                document.execCommand("InsertText", false, 'P');
                document.execCommand("InsertText", false, 'A');
                document.execCommand("InsertText", false, 'S');
                document.execCommand("InsertText", false, 'S');
                
                log(tf.value);
            }
        </script>
    </head>
    <body onload="test()">
        This tests that you can set selection in an textfield contained in an anchor element even though we try to prevent selection from starting within anchor elements.<br>
        <a href="javascript:void(0)">
            <input id="tf">
        </a>
        <pre id="console"></pre>
    </body>
</html>