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chromium/third_party/blink/web_tests/external/wpt/dom/nodes/Node-mutation-adoptNode.html 

<!DOCTYPE html>
<meta charset=utf-8>
<title>Node-manipulation-adopted</title>
<link rel=help href="https://dom.spec.whatwg.org/#dom-domimplementation-createhtmldocument">
<link rel=help href="https://dom.spec.whatwg.org/#mutation-algorithms">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
"use strict";

test(() => {
  const old = document.implementation.createHTMLDocument("");
  const div = old.createElement("div");
  div.appendChild(old.createTextNode("text"));
  assert_equals(div.ownerDocument, old);
  assert_equals(div.firstChild.ownerDocument, old);
  document.body.appendChild(div);
  assert_equals(div.ownerDocument, document);
  assert_equals(div.firstChild.ownerDocument, document);
}, "simple append of foreign div with text");

</script>