chromium/third_party/blink/web_tests/external/wpt/css/selectors/parsing/parse-descendant.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Selectors: Descendant combinator</title>
<link rel="help" href="https://drafts.csswg.org/selectors-3/#descendant-combinators">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<script>
  test_valid_selector('h1 em');
  test_valid_selector('div * p');
  test_valid_selector('div p *[href]',
      ['div p *[href]', 'div p [href]']);
</script>