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diff --git a/dom/base/test/test_treewalker_nextsibling.xml b/dom/base/test/test_treewalker_nextsibling.xml
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+<?xml-stylesheet type="text/css" href="/tests/SimpleTest/test.css" ?>
+<root>
+ <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js" xmlns="http://www.w3.org/1999/xhtml"/>
+
+ <body xmlns="http://www.w3.org/1999/xhtml">
+ <p id="display"></p>
+ <div id="content" style="display: none;"></div>
+ <textarea id="test" style="height: 300px; max-width: 800px; overflow: scroll;"
+ rows="10" cols="160" readonly="readonly"/>
+ </body>
+
+<pre id="test" xmlns="http://www.w3.org/1999/xhtml">
+<script class="testbody" type="text/javascript" xmlns="http://www.w3.org/1999/xhtml">
+<![CDATA[
+var passedNodes = new WeakMap();
+function setPass(aNode) {
+ passedNodes.set(aNode, true);
+}
+
+SimpleTest.waitForExplicitFinish();
+
+window.addEventListener("load", function() {
+ var walker = document.createTreeWalker(
+ document,
+ NodeFilter.SHOW_TEXT | NodeFilter.SHOW_DOCUMENT,
+ null
+ );
+ setPass(walker.firstChild());
+ while (walker.nextSibling()) {
+ setPass(walker.currentNode);
+ }
+
+/*
+From http://www.w3.org/TR/2000/REC-DOM-Level-2-Traversal-Range-20001113/traversal.html#Traversal-TreeWalker
+Omitting nodes from the logical view of a subtree can result in a structure that
+is substantially different from the same subtree in the complete, unfiltered
+document. Nodes that are siblings in the TreeWalker view may be children of
+different, widely separated nodes in the original view. For instance, consider a
+NodeFilter that skips all nodes except for Text nodes and the root node of a
+document. In the logical view that results, all text nodes will be siblings and
+appear as direct children of the root node, no matter how deeply nested the
+structure of the original document.
+*/
+
+ walker2 = document.createTreeWalker(document, NodeFilter.SHOW_TEXT, null);
+ while (walker2.nextNode()) {
+ var cNode = walker2.currentNode;
+ ok(passedNodes.get(cNode), "Every text node should appear: " + walker2.currentNode.nodeValue);
+ walker.currentNode = cNode;
+ var parent = walker.parentNode();
+ is(parent, document, "parent of text node should be document");
+
+ // Check nextSibling's previousSibling.
+ walker.currentNode = cNode;
+ if (walker.nextSibling()) {
+ is(cNode, walker.previousSibling(), "nextSibling.previousSibling should be consistent");
+ }
+
+ // Check previousSibling's nextSibling.
+ walker.currentNode = cNode;
+ if (walker.previousSibling()) {
+ is(cNode, walker.nextSibling(), "previousSibling.nextSibling should be consistent");
+ }
+ }
+ SimpleTest.finish();
+}, true);
+]]>
+</script>
+</pre>
+
+ <test>
+ zero
+ <one>
+ one-A
+ <two>
+ two-A
+ </two>
+ <two>
+ two-B
+ </two>
+ one-B
+ </one>
+ <one>
+ one-C
+ <two>
+ two-D
+ </two>
+ <two>
+ two-E
+ </two>
+ one-F
+ </one>
+ zero
+ </test>
+</root>
+