iframe-append-to-child-document.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-iframe-element/iframe-append-to-child-document.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Append iframe element to its own child document</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<iframe id=x></iframe>

<script>

test(function() {

  var iframe = document.getElementById('x');

  var childWindow = iframe.contentWindow;

  assert_equals(childWindow.parent, window);

  childWindow.document.body.appendChild(iframe);

  assert_equals(childWindow.parent, null);

  assert_equals(iframe.contentWindow, null);

  assert_equals(childWindow.document.body.firstChild, iframe);

});

</script>