chromium/third_party/blink/web_tests/external/wpt/css/css-text/letter-spacing/letter-spacing-bidi-002.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text level 3 Test: letter spacing at bidi fragment boudary</title>
<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
<link rel="help" href="https://drafts.csswg.org/css-text-3/#letter-spacing-property">
<link rel="help" href="https://drafts.csswg.org/css-writing-modes-4/#bidi-fragmentation">
<link rel="match" href="reference/letter-spacing-bidi-002-ref.html">
<meta name="assert" content="When bidi would cause to pieces of a single inline box to be appart if there was enough room to fit everything in one line,
the two pieces are separate fragments even if they end up next to eachother due to line breaking.
Letter spacing at the boundary of such separate fragments comes from their common ancestor,
not from the letter-spacing property on the fragmented inline box itself.">
<style>
div {
  font-family: monospace;
  font-size: 3em;
  width: 0;
}
span {
  letter-spacing: 1ch;
}
</style>

<p>Test passes if the rightmost character of the line that starts with “a” is under the number 3.
<div>12345</div>
<div>a<span>aב</span> ב</div>