chromium/third_party/blink/web_tests/fast/css/word-spacing-linebreak.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
 <head>
  <title>CSS Test: word-spacing and line-break</title>
  <link rel="help" href="http://www.w3.org/TR/CSS21/text.html#spacing-props">
  <style type="text/css">
    div {
      font: 12px Ahem;
      width: 14em;
    }
    .test span {
      word-spacing: 1em;
    }
    .ws-pre p {
      white-space: pre-wrap;
    }
  </style>
 </head>
 <body>

   <p>The spaces should trigger a line-break, and the last black box should break onto the next line.</p>
    <div class="ws-pre">
      <p class="test"><span>1234567890  2</span></p>
    </div>

 </body>
</html>