test_weakmap_keys_preserved2.xhtml

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<?xml version="1.0"?>

<?xml-stylesheet type="text/css" href="chrome://global/skin"?>

<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=673468

-->

<window title="Mozilla Bug "

        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>

  <!-- test results are displayed in the html:body -->

  <body xmlns="http://www.w3.org/1999/xhtml">

  <a id="testelem" href="https://bugzilla.mozilla.org/show_bug.cgi?id="

     target="_blank">Mozilla Bug 673468</a>

  </body>

  <!-- test code goes here -->

  <script type="application/javascript">

  <![CDATA[

  /** Test for Bug 673468 **/

  SimpleTest.waitForExplicitFinish();

  SpecialPowers.DOMWindowUtils.garbageCollect();

  let get_live_dom = function () {

    return document.getElementById("testelem");

};

  let wrappers_as_keys_test = function () {

    let e = new MessageEvent("foo", { bubbles: false, cancellable: false,

                                      data: { dummy: document.createXULElement("foo") }});

    window.eeeevent = e;

    let live_dom = e.data.dummy;

    let dead_dom = document.createElementNS("http://www.w3.org/1999/xhtml", "div");

    let dead_child = document.createElementNS("http://www.w3.org/1999/xhtml", "div");

    dead_dom.appendChild(dead_child);

    is(dead_dom.children.length, 1, "children have wrong length");

    let wrappee = {};

    dead_dom.abcxyz = wrappee;

    let system = Cc["@mozilla.org/systemprincipal;1"].createInstance();

    let sandbox = Cu.Sandbox(system);

    sandbox.wrapper = wrappee;

    sandbox.value = dead_dom;

    let map = Cu.evalInSandbox("wm = new WeakMap(); wm.set(wrapper, value); wm", sandbox);

    sandbox.wrapper = null;

    sandbox.value = null;

    live_dom.xyzabc = {wrappee, m: map, sb: sandbox};

    let key = ChromeUtils.nondeterministicGetWeakMapKeys(map)[0];

    let value = map.get(key);

    is(value.children.length, 1, "children have wrong length");

  wrappers_as_keys_test();

  let check_wrappers_as_keys = function () {

    let live_dom = window.eeeevent.data.dummy;

    let live_map = live_dom.xyzabc.m;

    is(ChromeUtils.nondeterministicGetWeakMapKeys(live_map).length, 1,

      "Map should not be empty.");

    let key = ChromeUtils.nondeterministicGetWeakMapKeys(live_map)[0];

    let value = live_map.get(key);

    is(value.children.length, 1, "children have wrong length");

  Cu.schedulePreciseGC(function () {

    SpecialPowers.DOMWindowUtils.cycleCollect();

    SpecialPowers.DOMWindowUtils.garbageCollect();

    check_wrappers_as_keys();

    SimpleTest.finish();

});

]]>

  </script>

</window>