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

<!DOCTYPE html>
<title>Test Content Security Policy</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/utils.js"></script>

<body>

<script>
promise_test(async () => {
  const frame = attachFencedFrame("resources/dummy.html");
  document.body.removeChild(frame);
  document.body.append(frame);

}, "Fenced frames should not crash and burn when re-inserting a fenced frame");

promise_test(async () => {
  const frame = document.createElement("iframe");
  frame.sandbox = "allow-scripts allow-same-origin";
  document.body.appendChild(frame);
  const fenced_frame = frame.contentDocument.createElement("fencedframe");
  fenced_frame.src = "resources/dummy.html";
  frame.contentDocument.body.appendChild(fenced_frame);
  frame.contentDocument.body.removeChild(fenced_frame);
  frame.contentDocument.body.append(fenced_frame);
}, "Fenced frames should not crash and burn when re-inserting a fenced frame" +
   "in a sandboxed iframe which doesn't support child fenced frames.");

</script>

</body>
</html>