1 files changed, 91 insertions, 0 deletions
diff --git a/testing/web-platform/tests/dom/traversal/TreeWalker-previousSiblingLastChildSkip.html b/testing/web-platform/tests/dom/traversal/TreeWalker-previousSiblingLastChildSkip.html
new file mode 100644
index 0000000000..5e28aa5142
--- /dev/null
+++ b/testing/web-platform/tests/dom/traversal/TreeWalker-previousSiblingLastChildSkip.html
@@ -0,0 +1,91 @@
+<!DOCTYPE html>
+<html>
+<!--
+Test adapted from chromium/source/src/third_party/WebKit/LayoutTests/fast/dom/TreeWalker/script-tests/previousSiblingLastChildSkip.js
+-->
+<head>
+<title>TreeWalker: previousSiblingLastChildSkip</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>Test that previousSibling properly respects the filter.</p>
+<script>
+var testElement;
+setup(function() {
+    testElement = document.createElement("div");
+    testElement.id = 'root';
+    // testElement.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>';
+    // testElement.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>';
+
+    // XXX for Servo, build the tree without using innerHTML
+    var a1 = document.createElement("div"); a1.id = "A1";
+    var b1 = document.createElement("div"); b1.id = "B1";
+    var b2 = document.createElement("div"); b2.id = "B2";
+    var c1 = document.createElement("div"); c1.id = "C1";
+    var c2 = document.createElement("div"); c2.id = "C2";
+    var c3 = document.createElement("div"); c3.id = "C3";
+    var c4 = document.createElement("div"); c4.id = "C4";
+    var d1 = document.createElement("div"); d1.id = "D1";
+    var d2 = document.createElement("div"); d2.id = "D2";
+
+    testElement.appendChild(a1);
+    a1.appendChild(b1);
+    a1.appendChild(b2);
+    b1.appendChild(c1);
+    b1.appendChild(c2);
+    b2.appendChild(c3);
+    b2.appendChild(c4);
+    c2.appendChild(d1);
+    c2.appendChild(d2);
+});
+
+test(function()
+{
+    function filter(node)
+    {
+        if (node.id == "B1")
+            return NodeFilter.FILTER_SKIP;
+        return NodeFilter.FILTER_ACCEPT;
+    }
+
+    var walker = document.createTreeWalker(testElement, NodeFilter.SHOW_ELEMENT, filter);
+    assert_node(walker.currentNode, { type: Element, id: 'root' });
+    assert_node(walker.firstChild(), { type: Element, id: 'A1' });
+    assert_node(walker.currentNode, { type: Element, id: 'A1' });
+    assert_node(walker.nextNode(), { type: Element, id: 'C1' });
+    assert_node(walker.currentNode, { type: Element, id: 'C1' });
+    assert_node(walker.nextNode(), { type: Element, id: 'C2' });
+    assert_node(walker.currentNode, { type: Element, id: 'C2' });
+    assert_node(walker.nextNode(), { type: Element, id: 'D1' });
+    assert_node(walker.currentNode, { type: Element, id: 'D1' });
+    assert_node(walker.nextNode(), { type: Element, id: 'D2' });
+    assert_node(walker.currentNode, { type: Element, id: 'D2' });
+    assert_node(walker.nextNode(), { type: Element, id: 'B2' });
+    assert_node(walker.currentNode, { type: Element, id: 'B2' });
+    assert_node(walker.previousSibling(), { type: Element, id: 'C2' });
+    assert_node(walker.currentNode, { type: Element, id: 'C2' });
+}, 'Test that previousSibling properly respects the filter.');
+</script>
+</body>
+</html>