Node-childNodes.html

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

<!DOCTYPE html>

<meta charset=utf-8>

<title>Node.childNodes</title>

<link rel=help href="https://dom.spec.whatwg.org/#dom-node-childnodes">

<link rel=author title="Tim Taubert" href="mailto:ttaubert@mozilla.com">

<link rel=author title="Ms2ger" href="mailto:Ms2ger@gmail.com">

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

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

<div id="log"></div>

<div style="display: none">

  <ul id='test'><li>1</li><li>2</li><li>3</li><li>4</li></ul>

</div>

<script>

test(function() {

  var element = document.createElement("p");

  assert_equals(element.childNodes, element.childNodes);

}, "Caching of Node.childNodes");

var check_parent_node = function(node) {

  assert_array_equals(node.childNodes, []);

  var children = node.childNodes;

  var child = document.createElement("p");

  node.appendChild(child);

  assert_equals(node.childNodes, children);

  assert_array_equals(children, [child]);

  assert_equals(children.item(0), child);

  var child2 = document.createComment("comment");

  node.appendChild(child2);

  assert_array_equals(children, [child, child2]);

  assert_equals(children.item(0), child);

  assert_equals(children.item(1), child2);

  assert_false(2 in children);

  assert_equals(children[2], undefined);

  assert_equals(children.item(2), null);

};

test(function() {

  check_parent_node(document.createElement("p"));

}, "Node.childNodes on an Element.");

test(function() {

  check_parent_node(document.createDocumentFragment());

}, "Node.childNodes on a DocumentFragment.");

test(function() {

  check_parent_node(new Document());

}, "Node.childNodes on a Document.");

test(function() {

  var node = document.createElement("div");

  var kid1 = document.createElement("p");

  var kid2 = document.createTextNode("hey");

  var kid3 = document.createElement("span");

  node.appendChild(kid1);

  node.appendChild(kid2);

  node.appendChild(kid3);

  var list = node.childNodes;

  assert_array_equals([...list], [kid1, kid2, kid3]);

  var keys = list.keys();

  assert_false(keys instanceof Array);

  keys = [...keys];

  assert_array_equals(keys, [0, 1, 2]);

  var values = list.values();

  assert_false(values instanceof Array);

  values = [...values];

  assert_array_equals(values, [kid1, kid2, kid3]);

  var entries = list.entries();

  assert_false(entries instanceof Array);

  entries = [...entries];

  assert_equals(entries.length, keys.length);

  assert_equals(entries.length, values.length);

  for (var i = 0; i < entries.length; ++i) {

    assert_array_equals(entries[i], [keys[i], values[i]]);

  var cur = 0;

  var thisObj = {};

  list.forEach(function(value, key, listObj) {

    assert_equals(listObj, list);

    assert_equals(this, thisObj);

    assert_equals(value, values[cur]);

    assert_equals(key, keys[cur]);

    cur++;

  }, thisObj);

  assert_equals(cur, entries.length);

  assert_equals(list[Symbol.iterator], Array.prototype[Symbol.iterator]);

  assert_equals(list.keys, Array.prototype.keys);

  if (Array.prototype.values) {

    assert_equals(list.values, Array.prototype.values);

  assert_equals(list.entries, Array.prototype.entries);

  assert_equals(list.forEach, Array.prototype.forEach);

}, "Iterator behavior of Node.childNodes");

test(() => {

  var node = document.getElementById("test");

  var children = node.childNodes;

  assert_true(children instanceof NodeList);

  var li = document.createElement("li");

  assert_equals(children.length, 4);

  node.appendChild(li);

  assert_equals(children.length, 5);

  node.removeChild(li);

  assert_equals(children.length, 4);

}, "Node.childNodes should be a live collection");

</script>