details-name-closes-self-usecounter-01.html

<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>

<body>
<div id="group">
  <details name="n" open></details>
</div>
<script>

const kHTMLDetailsElementNameAttributeClosesSelf = 4678;

test(() => {
  assert_false(internals.isUseCounted(document, kHTMLDetailsElementNameAttributeClosesSelf),
               "shouldn't be counted before the test.");

  const e = document.createElement('details');
  e.name = "n";
  e.open = true;

  assert_false(internals.isUseCounted(document, kHTMLDetailsElementNameAttributeClosesSelf),
               "shouldn't be counted before inserting element");
  assert_true(e.open, "should be open before insertion");

  document.getElementById("group").appendChild(e);

  assert_true(internals.isUseCounted(document, kHTMLDetailsElementNameAttributeClosesSelf),
              "should be counted after insertion");
  assert_false(e.open, "should be closed after insertion");
}, 'Behavior of kHTMLDetailsElementNameAttributeClosesSelf use counter');

</script>

chromium/third_party/blink/web_tests/html/details_summary/details-name-closes-self-usecounter-01.html