chromium/third_party/blink/web_tests/external/wpt/css/css-fonts/parsing/font-shorthand-variant.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Fonts Module Level 4: font-variant vs font shorthand</title>
<link rel="help" href="https://drafts.csswg.org/css-fonts-4/#font-prop">
<meta name="assert" content="Only the CSS2 font-variant values (normal | small-caps) are supported by the font shorthand.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="container">
  <div id="target"></div>
</div>
<script>
test(() => {
  const target = document.getElementById('target');
  target.style.font = "medium serif";
  target.style.fontVariant = "small-caps";
  assert_equals(target.style.font, "small-caps medium serif", "font should be updated");
  target.style.fontVariant = "titling-caps";
  assert_equals(target.style.font, "", "font should be empty");
  target.style.fontVariant = "normal";
  assert_equals(target.style.font, "medium serif", "font should be reset");
  target.style.fontVariant = "full-width";
  assert_equals(target.style.font, "", "font should be empty");
}, "font shorthand returns only CSS2 font-variant values");
</script>
</body>
</html>