chromium/third_party/blink/web_tests/external/wpt/css/css-ui/outline-004.html

<!doctype html>
<html lang=en>
  <meta charset=utf-8>
  <title>CSS-UI test: connected outline parts</title>
  <link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net">
  <meta name=flags content="ahem should">
  <meta name=assert content="Each part of the outline should be fully connected rather than open on some sides">
  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">
  <link rel=help href="https://drafts.csswg.org/css-ui-3/#outline-props">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
span {
  outline: solid green 10px;
  color: green;
}
div {
  box-sizing: border-box;
  width: 100px;
  height: 100px;
  padding: 10px;
  line-height: 40px;
  font-size: 40px;
  background: red;
  font-family: Ahem;
}
</style>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
  <div><span>xx<br>xx</span></div>