mozilla-release/testing/web-platform/tests/custom-elements/reactions/HTMLLIElement.html

<!DOCTYPE html>
<title>Custom Elements: CEReactions on HTMLLIElement interface</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<meta name="assert"
  content="value of HTMLLIElement interface must have CEReactions">
<meta name="help" content="https://html.spec.whatwg.org/#the-li-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/custom-elements-helpers.js"></script>
<script src="./resources/reactions.js"></script>

<body>
<script>

function getParentElement(parentElementName) {
  let parentElement = document.createElement(parentElementName);
  document.body.appendChild(parentElement);
  return parentElement;
}

testReflectAttributeWithParentNode(
  'value', 'value', '3',
  '5', 'value on HTMLLIElement in ol', 'li',
  () => getParentElement('ol'), HTMLLIElement
);
testReflectAttributeWithParentNode(
  'value', 'value', '3',
  '5', 'value on HTMLLIElement in ul', 'li',
  () => getParentElement('ul'), HTMLLIElement
);
testReflectAttributeWithParentNode(
  'value', 'value', '3',
  '5', 'value on HTMLLIElement in menu', 'li',
  () => getParentElement('menu'), HTMLLIElement
);

</script>
</body>