chromium/third_party/blink/web_tests/external/wpt/css/css-text/white-space/white-space-intrinsic-size-002.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text Test: max-content sizing and white-space:break-spaces</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-002-ref.html">
<meta name="assert" content="If white-space is break-spaces, preserved spaces at the end of the line do affect the intrinsic max-content size. The value of overflow-wrap makes no difference.">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
aside {
  float: left;
  white-space: break-spaces;
  background: blue;
}
aside:last-of-type {
  float:right;
  overflow-wrap: break-word;
}
div {
  color: transparent;
  font-family: Ahem;
  font-size: 50px;
  width: 3ch;
  /* both floats should take the full 3ch,
     one on each line
     and therefore line up to look like a single large box.

     If the spaces are not taken into account for min-content sizing,
     the floats will leave a gap between them */
}
.owbw { overflow-wrap: break-word; }
</style>

<p>Test passes if there is a single blue rectangle below.
<div>
  <aside>X  </aside>
  <aside>X  </aside>
</div>