chromium/third_party/blink/web_tests/external/wpt/css/css-text/text-transform/text-transform-shaping-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text level 3 Test: text-transform:capitalize and text-shaping</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
<link rel="help" href="https://www.w3.org/TR/css-text-3/#boundary-shaping">
<link rel="help" href="https://www.w3.org/TR/css-text-3/#text-transform-property">
<link rel="match" href="reference/text-transform-shaping-001-ref.html">
<meta name="assert" content="Text shaping must not be broken across inline box boundaries when there is no change in formatting. Arabic is not a bicameral script, so text-transform:capitalize has no effect, and should not affect shaping.">
<style>
  div { font-size: 4em; }
  div:last-of-type::first-letter { text-transform: capitalize; }
  body {
    /* Optional bit, just to avoid the arabic strings being too far off to the right,
     which makes them harder to notice if you're going through a lot of tests
     and not paying all that much attention. */
    max-width: 600px;
    max-width: max-content;
  }
</style>

<p>Test passes if there are two identical strings below. Pay attention to the right-most character.
<div dir=rtl lang=ar>عائلة</div>
<div dir=rtl lang=ar>عائلة</div>