chromium/third_party/blink/web_tests/external/wpt/css/css-text/line-breaking/line-breaking-012.html

<!doctype html>
<html>
<meta charset="utf-8">
<title>CSS Text — line breaking for nowrap and floats</title>
<meta name=assert content="When whitespace: nowrap is specified, floats should not cause line breaks">
<link rel=help href="https://www.w3.org/TR/css-text-3/#white-space-property">
<link rel=match href="reference/line-breaking-012-ref.html">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
.container {
    position: relative;
    color:green;
    line-height: 1em;
    font-family: Ahem;
    font-size: 20px;
}

.wrapper {
    white-space: nowrap;
}

span {
    float: left;
}

.fail {
    color: red;
    position: absolute;
    left: 0;
    top: 0;
    z-index: -1;
}
</style>
<body>
  <p>There should be a green rectangle and no red.</p>
  <div class="container">
    <div class="fail">XX</div>
    <div class="wrapper">X<span>X<span></div>
  </div>
</body>
</html>