TreeWalker-realm.html

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This WPT test may be referenced by the following Test IDs:
- /dom/traversal/TreeWalker-realm.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>TreeWalker tests</title>

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

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

<body>

<script>

test(t => {

  const i = document.createElement("iframe");

  i.srcdoc = "<!DOCTYPE html>";

  document.body.appendChild(i);

  t.add_cleanup(() => i.remove());

  const walker = document.createTreeWalker(i.contentDocument,

                                           NodeFilter.SHOW_ELEMENT);

  walker.nextNode();

  assert_true(walker.currentNode instanceof i.contentWindow.Node);

}, "Node returned by TreeWalker from different realm");

test(t => {

  const i = document.createElement("iframe");

  i.srcdoc = "<!DOCTYPE html>";

  document.body.appendChild(i);

  t.add_cleanup(() => i.remove());

  let acceptNode_node;

  const walker = document.createTreeWalker(

      i.contentDocument, NodeFilter.SHOW_ELEMENT,

          acceptNode(node) {

              acceptNode_node = node;

              return NodeFilter.FILTER_ACCEPT;

});

  walker.nextNode();

  assert_true(acceptNode_node instanceof i.contentWindow.Node);

  assert_true(walker.currentNode instanceof i.contentWindow.Node);

}, "Node returned by TreeWalker from different realm with acceptNode");

</script>

</body>