<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=393974 --> <head> <title>Test for Bug 393974</title> <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=393974">Mozilla Bug 393974</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script class="testbody" type="text/javascript"> SimpleTest.waitForExplicitFinish(); function test() { // Create a tree walker with a filter which creates a cycle... var tw = document.createTreeWalker(document, NodeFilter.SHOW_ALL, function(n) { // force the closure to contain the // global object, in case a future // optimization might minimize the // function's captured environment if ("foo" + window == "fooPIRATES!") return NodeFilter.FILTER_ACCEPT; return NodeFilter.FILTER_REJECT; }); // That should have been enough to create a leak, but we should do at least // a couple tests while we're here so that this document doesn't show up as // having no tests pass *or* fail. ok(tw.firstChild() === null, "shouldn't be a first child"); ok(tw.currentNode === document, "should be unchanged"); ok(tw.lastChild() === null, "shouldn't be a last child"); ok(tw.currentNode === document, "should be unchanged"); ok(tw.nextNode() === null, "shouldn't be a next node"); ok(tw.currentNode === document, "should be unchanged"); ok(tw.nextSibling() === null, "shouldn't be a next sibling"); ok(tw.currentNode === document, "should be unchanged"); ok(tw.parentNode() === null, "shouldn't be a parent node"); ok(tw.currentNode === document, "should be unchanged"); ok(tw.previousNode() === null, "shouldn't be a previous node"); ok(tw.currentNode === document, "should be unchanged"); ok(tw.previousSibling() === null, "shouldn't be a previous sibling"); ok(tw.currentNode === document, "should be unchanged"); } addLoadEvent(test); addLoadEvent(SimpleTest.finish); </script> </pre> </body> </html>