chromium/third_party/blink/web_tests/external/wpt/css/css-highlight-api/painting/custom-highlight-painting-016.html

<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Highlight API Test: Painting</title>
<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
<link rel="match" href="custom-highlight-painting-001-ref.html">
<meta name="assert" value="Highlighted elements must be correctly painted and there should be no caching that doesn't take highlight names into account">
<style>
  #affected::highlight(foo) {
    background-color: yellow;
    color: blue;
  }
</style>
<body><span></span><span id="affected">One </span><span id="affected">two </span><span>three…</span>
<script>
  // The first <span> style resolution shouldn't cause caching an empty set of matched properties that could be used with the spans that should be highlighted later.
  const node = document.body;
  let r = new Range();
  r.setStart(node, 1);
  r.setEnd(node, 3);
  CSS.highlights.set("foo", new Highlight(r));
</script>