chromium/third_party/blink/web_tests/external/wpt/html/rendering/non-replaced-elements/form-controls/select-sizing-001.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Test for sizing of select elements, with wide vs. empty option selected</title>
  <link rel="author" title="Daniel Holbert" href="mailto:[email protected]">
  <link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#list-box">
  <link rel="match" href="select-sizing-001-ref.html">
  <style>
    select {
      color: transparent;
      margin: 1px;
    }
    div.customBorder > select {
      /* This class is to let us test select elements *without* native theming
         (for browsers that have both native and non-native controls): */
      border: 3px solid black;
    }
  </style>
</head>
<body>
  <div>
    <!-- Wide thing is 2nd, and not selected: -->
    <select>
      <option></option>
      <option>some wide option</option>
    </select>
    <br>
    <!-- Wide thing is 2nd, and selected: -->
    <select>
      <option></option>
      <option selected>some wide option</option>
    </select>
    <br>
    <!-- Wide thing is 1st, and selected (implicitly): -->
    <select>
      <option>some wide option</option>
      <option></option>
    </select>
    <br>
    <!-- Wide thing is 1st, and not selected: -->
    <select>
      <option>some wide option</option>
      <option selected></option>
    </select>
  </div>

  <!-- This is the same as above, but now with a custom border on the
       select elements: -->
  <div class="customBorder">
    <!-- Wide thing is 2nd, and not selected: -->
    <select>
      <option></option>
      <option>some wide option</option>
    </select>
    <br>
    <!-- Wide thing is 2nd, and selected: -->
    <select>
      <option></option>
      <option selected>some wide option</option>
    </select>
    <br>
    <!-- Wide thing is 1st, and selected (implicitly): -->
    <select>
      <option>some wide option</option>
      <option></option>
    </select>
    <br>
    <!-- Wide thing is 1st, and not selected: -->
    <select>
      <option>some wide option</option>
      <option selected></option>
    </select>
  </div>

</body>
</html>