chromium/third_party/blink/web_tests/external/wpt/css/css-fonts/size-adjust-01-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<link rel="author" href="mailto:[email protected]">
<title>Tests the size-adjust descriptor of @font-face</title>
<style>
@font-face {
  font-family: reference-font;
  src: local(Ahem), url(/fonts/Ahem.ttf);
  /* Uppercase ASCII only + U+20 to make this "first available font" */
  unicode-range: U+20,U+41-5A;
}

div {
  font-size: 40px;
  line-height: 100px;
}

.reference {
  font-family: reference-font, sans-serif;
}

.large {
  font-size: 60px;
}
</style>

<p>size-adjust:100% should be the same as no override.</p>

<div>
  <span class="reference">TheQuickBrownFox</span>
</div>

<p>size-adjust:150% should affect Ahem characters only.</p>

<div>
  <span class="reference"><span class="large">T</span>he<span class="large">Q</span>uick<span class="large">B</span>rown<span class="large">F</span>ox</span>
</div>