chromium/third_party/blink/web_tests/external/wpt/css/css-text/hyphens/hyphens-character.html

<!doctype html>
<html lang="en" class="reftest-wait">
  <link rel="author" title="Dominik Röttsches" href="mailto:[email protected]">
  <link rel="help" href="https://www.w3.org/TR/css-text-3/#hyphenation">
  <link rel="match" href="reference/hyphens-character-ref.html">
    <meta charset="utf-8" />
    <meta content="This test ensure that actual characters are show for the hyphen,
     as crbug.com/1267606 illustrates how the hyphen can go missing
     depending on character coverage API." name="assert">
    <style>
        @font-face {
            font-family: roboto_hyphen;
            src: url(resources/roboto_hyphenation_subset.ttf)
        }

        div {
        display: block;
            width: 40px;
            hyphens: auto;
            -webkit-hyphens: auto;
            font-family: roboto_hyphen, cursive;
        }
    </style>
  <body>
    <div lang="de">
      Donaudampfschifffahrt
    </div>

    <script>
    document.fonts.ready.then(
      () => { document.documentElement.classList.remove("reftest-wait"); });
    </script>
  </body>
</html>