chromium/src/third_party/blink/web_tests/fast/forms/select/menulist-update-text-popup.html

Tests &lt;select&gt; text update when popup is visible and selectionIndex changes.<br>
Needs run-layout-test.<br>
<div style="position: absolute; top: 50px">
  <select id="select">
    <option>A</option>
    <option>B</option>
    <option>C</option>
  </select>
</div>
<pre id="output"></pre>
<script>
if (window.testRunner && window.eventSender) {
  testRunner.dumpAsText();
  var select = document.getElementById('select');
  select.focus();
  eventSender.keyDown(' ', null);
  select.selectedIndex = 2;

  // We need to show in the result the title text of the select when popup is visible.
  // Must dump renderer tree here otherwise run-layout-test will close the popup.
  // The title text should be "C".
  output.textContent = internals.elementLayoutTreeAsText(select.parentNode);
  testRunner.notifyDone();
}
</script>