chromium/third_party/blink/web_tests/external/wpt/html/rendering/non-replaced-elements/sections-and-headings/headings-styles.html

<!doctype html>
<title>default styles for h1..h6, hgroup, article, aside, nav, section</title>
<meta name="viewport" content="width=device-width">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/rendering/support/test-ua-stylesheet.js"></script>
<style>
/* Specify this bogus namespace, so the rules in this stylesheet only apply to the `fakeClone`d elements in #refs, not the HTML elements in #tests. */
@namespace url(urn:not-html);

article, aside, h1, h2, h3, h4, h5, h6, hgroup, nav, section {
  display: block;
}

h1 { margin-block: 0.67em; font-size: 2.00em; font-weight: bold; }
h2 { margin-block: 0.83em; font-size: 1.50em; font-weight: bold; }
h3 { margin-block: 1.00em; font-size: 1.17em; font-weight: bold; }
h4 { margin-block: 1.33em; font-size: 1.00em; font-weight: bold; }
h5 { margin-block: 1.67em; font-size: 0.83em; font-weight: bold; }
h6 { margin-block: 2.33em; font-size: 0.67em; font-weight: bold; }

:is(article, aside, nav, section) h1 { margin-block: 0.83em; font-size: 1.50em; }
:is(article, aside, nav, section) :is(article, aside, nav, section) h1 { margin-block: 1.00em; font-size: 1.17em; }
:is(article, aside, nav, section) :is(article, aside, nav, section) :is(article, aside, nav, section) h1 { margin-block: 1.33em; font-size: 1.00em; }
:is(article, aside, nav, section) :is(article, aside, nav, section) :is(article, aside, nav, section) :is(article, aside, nav, section) h1 { margin-block: 1.67em; font-size: 0.83em; }
:is(article, aside, nav, section) :is(article, aside, nav, section) :is(article, aside, nav, section) :is(article, aside, nav, section) :is(article, aside, nav, section) h1 { margin-block: 2.33em; font-size: 0.67em; }

</style>

<div id="log"></div>

<div id="tests">
  <h1></h1>
  <h2></h2>
  <h3></h3>
  <h4></h4>
  <h5></h5>
  <h6></h6>
  <hgroup></hgroup>
  <article></article>
  <aside></aside>
  <nav></nav>
  <section></section>
  <article data-skip>
    <h1></h1>
    <article data-skip>
      <h1></h1>
      <article data-skip>
        <h1></h1>
        <article data-skip>
          <h1></h1>
          <article data-skip>
            <h1></h1>
            <hgroup data-skip>
             <h1></h1>
             <h2></h2>
             <h3></h3>
             <h4></h4>
             <h5></h5>
            </hgroup>
          </article>
        </article>
      </article>
    </article>
  </article>
  <aside data-skip>
    <h1></h1>
    <aside data-skip>
      <h1></h1>
      <aside data-skip>
        <h1></h1>
        <aside data-skip>
          <h1></h1>
          <aside data-skip>
            <h1></h1>
            <hgroup data-skip>
             <h1></h1>
             <h2></h2>
             <h3></h3>
             <h4></h4>
             <h5></h5>
            </hgroup>
          </aside>
        </aside>
      </aside>
    </aside>
  </aside>
  <nav data-skip>
    <h1></h1>
    <nav data-skip>
      <h1></h1>
      <nav data-skip>
        <h1></h1>
        <nav data-skip>
          <h1></h1>
          <nav data-skip>
            <h1></h1>
            <hgroup data-skip>
             <h1></h1>
             <h2></h2>
             <h3></h3>
             <h4></h4>
             <h5></h5>
            </hgroup>
          </nav>
        </nav>
      </nav>
    </nav>
  </nav>
  <section data-skip>
    <h1></h1>
    <section data-skip>
      <h1></h1>
      <section data-skip>
        <h1></h1>
        <section data-skip>
          <h1></h1>
          <section data-skip>
            <h1></h1>
            <hgroup data-skip>
             <h1></h1>
             <h2></h2>
             <h3></h3>
             <h4></h4>
             <h5></h5>
            </hgroup>
          </section>
        </section>
      </section>
    </section>
  </section>
</div>

<div id="refs"></div>

<script>
  const props = [
    'display',
    'margin-top',
    'margin-right',
    'margin-bottom',
    'margin-left',
    'padding-top',
    'padding-right',
    'padding-bottom',
    'padding-left',
    'font-size',
    'font-weight',
  ];
  runUAStyleTests(props);

</script>