TreeWalker-walking-outside-a-tree.html

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

<!DOCTYPE html>

<html>

<!--

Test adapted from https://github.com/operasoftware/presto-testo/blob/master/core/standards/acid3/individual/006a.html

-->

<head>

<title>TreeWalker: walking-outside-a-tree</title>

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

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

<script src="support/assert-node.js"></script>

<div id=log></div>

</head>

<body>

<p>[Acid3 - Test 006a] walking outside a tree</p>

<script>

test(function () {

    // test 6: walking outside a tree

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

    var head = document.createElement('head');

    var title = document.createElement('title');

    var body = document.createElement('body');

    var p = document.createElement('p');

    doc.appendChild(head);

    head.appendChild(title);

    doc.appendChild(body);

    body.appendChild(p);

    var w = document.createTreeWalker(body, 0xFFFFFFFF, null);

    doc.removeChild(body);

    assert_equals(w.lastChild(), p, "TreeWalker failed after removing the current node from the tree");

    doc.appendChild(p);

    assert_equals(w.previousNode(), title, "failed to handle regrafting correctly");

    p.appendChild(body);

    assert_equals(w.nextNode(), p, "couldn't retrace steps");

    assert_equals(w.nextNode(), body, "couldn't step back into root");

    assert_equals(w.previousNode(), null, "root didn't retake its rootish position");

}, "walking outside a tree");

</script>

</body>

</html>