Document-createTreeWalker.html

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This WPT test may be referenced by the following Test IDs:
- /dom/nodes/Document-createTreeWalker.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>Document.createTreeWalker</title>

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

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

<div id=log></div>

<script>

test(function() {

  assert_throws_js(TypeError, function() {

    document.createTreeWalker();

});

}, "Required arguments to createTreeWalker should be required.");

test(function() {

  var tw = document.createTreeWalker(document.body);

  assert_equals(tw.root, document.body);

  assert_equals(tw.currentNode, document.body);

  assert_equals(tw.whatToShow, 0xFFFFFFFF);

  assert_equals(tw.filter, null);

}, "Optional arguments to createTreeWalker should be optional (1 passed).");

test(function() {

  var tw = document.createTreeWalker(document.body, 42);

  assert_equals(tw.root, document.body);

  assert_equals(tw.currentNode, document.body);

  assert_equals(tw.whatToShow, 42);

  assert_equals(tw.filter, null);

}, "Optional arguments to createTreeWalker should be optional (2 passed).");

test(function() {

  var tw = document.createTreeWalker(document.body, 42, null);

  assert_equals(tw.root, document.body);

  assert_equals(tw.currentNode, document.body);

  assert_equals(tw.whatToShow, 42);

  assert_equals(tw.filter, null);

}, "Optional arguments to createTreeWalker should be optional (3 passed, null).");

test(function() {

  var fn = function() {};

  var tw = document.createTreeWalker(document.body, 42, fn);

  assert_equals(tw.root, document.body);

  assert_equals(tw.currentNode, document.body);

  assert_equals(tw.whatToShow, 42);

  assert_equals(tw.filter, fn);

}, "Optional arguments to createTreeWalker should be optional (3 passed, function).");

</script>