chromium/third_party/blink/web_tests/external/wpt/css/css-pseudo/active-selection-014.html

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Pseudo-Elements Test: active selection and text-decoration</title>

  <link rel="author" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
  <link rel="help" href="https://www.w3.org/TR/css-pseudo-4/#highlight-selectors">
  <link rel="help" href="https://www.w3.org/TR/css-pseudo-4/#highlight-styling">
  <link rel="help" href="https://www.w3.org/TR/css-pseudo-4/#highlight-painting">
  <link rel="match" href="reference/active-selection-014-ref.html">

  <meta content="should" name="flags">
  <meta name="assert" content="This test checks that 'text-decoration' applies to highlight pseudo-element. Since neither 'color' nor 'background-color' has been specified by the pseudo-element selector in this test, then OS-default highlight colors should be used. The consequence of this is that the highlight color determines also the color of the underline.">

  <link rel="stylesheet" href="support/highlights.css">
  <style>
  div
    {
      font-size: 300%;
    }

  div::selection
    {
      text-decoration: underline;
    }
  </style>

  <!--
  "
  The element's own text decorations (both line decorations
  and emphasis marks) are thus drawn in the pseudo-element's
  own color when that is not currentColor, regardless of
  their original color or fill specifications.
  "
  coming from
  https://www.w3.org/TR/css-pseudo-4/#highlight-painting
  -->

  <script>
  function startTest()
  {
  var targetRange = document.createRange();
  /* We first create an empty range */
  targetRange.selectNodeContents(document.getElementById("test"));
  /* Then we set the range boundaries to the children of div#test */
  window.getSelection().addRange(targetRange);
  /* Finally, we now select such range of content */
  }
  </script>

  <body onload="startTest();">

  <p>Test passes if each glyph of "Selected Text" is underlined and if color and background color of "Selected Text" are the OS-default highlight colors. The underline color must also be the same as the highlight color of "Selected Text".

  <div id="test" class="highlight_reftest">Selected Text</div>