chromium/third_party/blink/web_tests/external/wpt/fenced-frame/window-frameElement.https.html

<!DOCTYPE html>
<title>Test window.parent</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="resources/utils.js"></script>

<body>

<script>
promise_test(async () => {
  const frame_element_key = token();

  attachFencedFrame(generateURL("resources/window-frameElement-inner.html",
      [frame_element_key]));
  const fenced_frame_result = await nextValueFromServer(frame_element_key);
  assert_equals(fenced_frame_result, "PASS");
}, "window.frameElement null for same-origin fenced frames");
</script>

</body>