chromium/third_party/blink/web_tests/external/wpt/css/css-text/line-breaking/line-breaking-atomic-007.html

<!doctype html>
<html>
<meta charset="utf-8">
<title>CSS Text — atomic inline line breaks before and after</title>
<meta name=assert content="There's a soft wrap opportunity before and after an atomic inline">
<link rel=match href="reference/line-breaking-atomic-007-ref.html">
<link rel=help href="https://www.w3.org/TR/css-text-3/#line-break-details">
<link rel=author title="Florian Rivoal" href="https://florian.rivoal.net">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
div {
  font: 50px/1 Ahem;
  width: 40px;
  height: 140px;
  background: red;
  color: green;
}
span {
  display: inline-block;
}
</style>

<p>Test passes if there is a green rectangle and <strong>no red</strong>.

<div>A<span>B</span>C</div>