1description('Test for a specific problem with previousSibling that failed in older versions of WebKit.');
2
3var testElement = document.createElement("div");
4testElement.innerHTML='<div id="A1"><div id="B1"><div id="C1"></div><div id="C2"><div id="D1"></div><div id="D2"></div></div></div><div id="B2"><div id="C3"></div><div id="C4"></div></div></div>';
5
6function filter(node)
7{
8    if (node.id == "B1")
9        return NodeFilter.FILTER_SKIP;
10    return NodeFilter.FILTER_ACCEPT;
11}
12
13var walker = document.createTreeWalker(testElement, NodeFilter.SHOW_ELEMENT, filter, false);
14
15shouldBe("walker.firstChild(); walker.currentNode.id", "'A1'");
16shouldBe("walker.nextNode(); walker.currentNode.id", "'C1'");
17shouldBe("walker.nextNode(); walker.currentNode.id", "'C2'");
18shouldBe("walker.nextNode(); walker.currentNode.id", "'D1'");
19shouldBe("walker.nextNode(); walker.currentNode.id", "'D2'");
20shouldBe("walker.nextNode(); walker.currentNode.id", "'B2'");
21shouldBe("walker.previousSibling(); walker.currentNode.id", "'C2'");
22
23var successfullyParsed = true;
24