test_bug393974.html

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https://bugzilla.mozilla.org/show_bug.cgi?id=393974

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  <title>Test for Bug 393974</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

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<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">

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<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>

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