chromium/third_party/blink/web_tests/external/wpt/html/semantics/interactive-elements/commands/legend/focusable-legend-manual.html

<!doctype html>
<title>Focusable legend</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=../common/accesskey.js></script>
<p>Press the access key combination for "a". <kbd></kbd></p>
<fieldset>
 <legend tabindex=0 onclick="fail('unexpected click event on legend')"
                    onfocus="fail('legend was focused')" accesskey=a>
  legend
  <input onfocus="pass()">
 </legend>
 <input onfocus="fail('input after legend was focused')">
</fieldset>