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

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

<body>
<script>

const kHTMLDetailsElementNameAttribute = 4677;

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

  const e1 = document.createElement('details');
  document.body.appendChild(e1);

  const e2 = document.createElement('details');
  e2.setAttribute("name", "");
  document.body.appendChild(e2);

  assert_false(internals.isUseCounted(document, kHTMLDetailsElementNameAttribute),
               "shouldn't be counted without non-empty name attribute");

  const e3 = document.createElement('details');
  e3.setAttribute("name", "groupname");
  document.body.appendChild(e3);

  assert_true(internals.isUseCounted(document, kHTMLDetailsElementNameAttribute),
              "should be counted with non-empty name attribute");
}, 'Behavior of kHTMLDetailsElementNameAttribute use counter');

</script>