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<html>
<!--
Test adapted from https://dxr.mozilla.org/chromium/source/src/third_party/WebKit/LayoutTests/fast/dom/TreeWalker/TreeWalker-basic.html
-->
<head>
<title>TreeWalker: Basic test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="traversal-support.js"></script>
<div id=log></div>
</head>
<body>
<p>This test checks the basic functionality of TreeWalker.</p>
<script>
function createSampleDOM()
{
// Tree structure:
// #a
// |
// +----+----+
// | |
// "b" #c
// |
// +----+----+
// | |
// #d <!--j-->
// |
// +----+----+
// | | |
// "e" #f "i"
// |
// +--+--+
// | |
// "g" <!--h-->
var div = document.createElement('div');
div.id = 'a';
// div.innerHTML = 'b<div id="c"><div id="d">e<span id="f">g<!--h--></span>i</div><!--j--></div>';
div.appendChild(document.createTextNode("b"));
var c = document.createElement("div");
c.id = 'c';
div.appendChild(c);
var d = document.createElement("div");
d.id = 'd';
c.appendChild(d);
var e = document.createTextNode("e");
d.appendChild(e);
var f = document.createElement("span");
f.id = 'f';
d.appendChild(f);
var g = document.createTextNode("g");
f.appendChild(g);
var h = document.createComment("h");
f.appendChild(h);
var i = document.createTextNode("i");
d.appendChild(i);
var j = document.createComment("j");
c.appendChild(j);
return div;
}
function check_walker(walker, root, whatToShowValue)
{
whatToShowValue = whatToShowValue === undefined ? 0xFFFFFFFF : whatToShowValue;
assert_equals(walker.toString(), '[object TreeWalker]', 'toString');
assert_equals(walker.root, root, 'root');
assert_equals(walker.whatToShow, whatToShowValue, 'whatToShow');
assert_equals(walker.filter, null, 'filter');
assert_equals(walker.currentNode, root, 'currentNode');
assert_readonly(walker, 'root');
assert_readonly(walker, 'whatToShow');
assert_readonly(walker, 'filter');
}
test(function ()
{
var root = createSampleDOM();
var walker = document.createTreeWalker(root);
check_walker(walker, root);
}, 'Construct a TreeWalker by document.createTreeWalker(root).');
test(function ()
{
var root = createSampleDOM();
var walker = document.createTreeWalker(root, null, null);
check_walker(walker, root, 0);
}, 'Construct a TreeWalker by document.createTreeWalker(root, null, null).');
test(function ()
{
var root = createSampleDOM();
var walker = document.createTreeWalker(root, undefined, undefined);
check_walker(walker, root);
}, 'Construct a TreeWalker by document.createTreeWalker(root, undefined, undefined).');
test(function ()
{
assert_throws(new TypeError(), function () { document.createTreeWalker(); });
assert_throws(new TypeError(), function () { document.createTreeWalker(null); });
assert_throws(new TypeError(), function () { document.createTreeWalker(undefined); });
assert_throws(new TypeError(), function () { document.createTreeWalker(new Object()); });
assert_throws(new TypeError(), function () { document.createTreeWalker(1); });
}, 'Give an invalid root node to document.createTreeWalker().');
test(function ()
{
var root = createSampleDOM();
var walker = document.createTreeWalker(root);
var f = root.lastChild.firstChild.childNodes[1]; // An element node: div#f.
assert_node(walker.currentNode, { type: Element, id: 'a' });
assert_equals(walker.parentNode(), null);
assert_node(walker.currentNode, { type: Element, id: 'a' });
assert_node(walker.firstChild(), { type: Text, nodeValue: 'b' });
assert_node(walker.currentNode, { type: Text, nodeValue: 'b' });
assert_node(walker.nextSibling(), { type: Element, id: 'c' });
assert_node(walker.currentNode, { type: Element, id: 'c' });
assert_node(walker.lastChild(), { type: Comment, nodeValue: 'j' });
assert_node(walker.currentNode, { type: Comment, nodeValue: 'j' });
assert_node(walker.previousSibling(), { type: Element, id: 'd' });
assert_node(walker.currentNode, { type: Element, id: 'd' });
assert_node(walker.nextNode(), { type: Text, nodeValue: 'e' });
assert_node(walker.currentNode, { type: Text, nodeValue: 'e' });
assert_node(walker.parentNode(), { type: Element, id: 'd' });
assert_node(walker.currentNode, { type: Element, id: 'd' });
assert_node(walker.previousNode(), { type: Element, id: 'c' });
assert_node(walker.currentNode, { type: Element, id: 'c' });
assert_equals(walker.nextSibling(), null);
assert_node(walker.currentNode, { type: Element, id: 'c' });
walker.currentNode = f;
assert_equals(walker.currentNode, f);
}, 'Walk over nodes.');
test(function() {
var treeWalker = document.createTreeWalker(document.body, 42, null);
assert_equals(treeWalker.root, document.body);
assert_equals(treeWalker.currentNode, document.body);
assert_equals(treeWalker.whatToShow, 42);
assert_equals(treeWalker.filter, null);
}, "Optional arguments to createTreeWalker should be optional (3 passed, null).");
</script>
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