css/css-text/white-space/white-space-intrinsic-size-004.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text Test: max-content sizing and white-space: pre-wrap</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">
<link rel="help" href="https://drafts.csswg.org/css-text-3/#propdef-white-space">
<link rel="help" href="https://drafts.csswg.org/css-text-3/#white-space-phase-2">
<link rel="match" href="reference/white-space-intrinsic-size-004-ref.html">
<meta name="assert" content="Preserved spaces at the end of the line do affect the intrinsic max-content size when white-space is pre-wrap, as spaces before a forced break, at the end of un unwrapped line, only hanging conditionally, which does not prevent contributing to the max-content size. The value of overflow-wrap makes no difference.">
<style>
aside {
  float: left;
  white-space: pre-wrap;
  background: green;
}
aside:last-of-type { overflow-wrap: break-word; }
div {
  background: red;
  color: transparent;
  font-family: monospace;
  font-size: 50px;
  width: 3ch;
  line-height: 1;
}
</style>

<p>Test passes if there is a single green rectangle below and no red.
<div>
  <aside>X  </aside>
  <aside>X  </aside>
</div>