<!DOCTYPE html>
<title>document.head</title>
<link rel="author" title="Ms2ger" href="mailto:ms2ger@gmail.com">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-document-head">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
test(function() {
  var head = document.getElementsByTagName("head")[0];
  assert_equals(document.head, head);
  document.head = "";
  assert_equals(document.head, head);
  document.head = document.createElement("head");
  assert_equals(document.head, head);
  document.documentElement.appendChild(document.createElement("head"));
  assert_equals(document.head, head);
  var head2 = document.createElement("head");
  document.documentElement.insertBefore(head2, head);
  assert_equals(document.head, head2);
});
</script>
