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Test Info:

<!DOCTYPE html>
<title>Test Add Fenced Frame to Detached Iframe</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
promise_test(async (t) => {
const iframe = attachIFrame("resources/dummy.html");
const doc = document.querySelector("iframe").contentDocument;
iframe.remove();
const ff = doc.createElement("fencedframe");
doc.body.append(ff);
}, 'Add fenced frame to detached iframe test');
promise_test(async (t) => {
const iframe = attachIFrame("resources/dummy.html");
const doc = document.querySelector("iframe").contentDocument;
const nested_iframe = doc.createElement('iframe');
nested_iframe.src = "resources/dummy.html";
doc.body.append(nested_iframe);
const nested_doc = doc.querySelector("iframe").contentDocument;
iframe.remove();
const ff = nested_doc.createElement("fencedframe");
nested_doc.body.append(ff);
}, 'Add fenced frame to nested iframe in detached frame test');
</script>
</body>
</html>