css/css-text/white-space/pre-wrap-014.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text level 3 Test: preserved white space at the end of soft-wrapped lines and white-space:pre-wrap with justification</title>
<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
<link rel="help" href="https://drafts.csswg.org/css-text-3/#white-space-phase-2">
<link rel="match" href="reference/pre-wrap-014-ref.html">
<meta name="assert" content="When white-space is pre-wrap, spaces at the end of soft-wrapped lines hang, so they do not have any effect when justifying.">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
div {
  font-size: 20px;
  font-family: Ahem;
  line-height: 1em;
  height: 1em;
  white-space: pre-wrap;

  color: transparent;
  background: red;

  width: 4ch;
  text-align: justify;
}
span {
  color: green;
  background: green;
}
</style>
<body>
  <p>Test passes if there is a <strong>filled green rectangle</strong> and <strong>no red</strong>.</p>
  <div><span>X X</span> X</div>
  <!-- invisible last line, because justification works on non-last lines-->
</body>