js/xpconnect/tests/chrome/test_weakmap_keys_preserved2.xhtml

   1 <?xml version="1.0"?>
   2 <?xml-stylesheet type="text/css" href="chrome://global/skin"?>
   3 <?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
   4 <!--
   5 https://bugzilla.mozilla.org/show_bug.cgi?id=673468
   6 -->
   7 <window title="Mozilla Bug "
   8         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
   9   <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
  10
  11   <!-- test results are displayed in the html:body -->
  12   <body xmlns="http://www.w3.org/1999/xhtml">
  13   <a id="testelem" href="https://bugzilla.mozilla.org/show_bug.cgi?id="
  14      target="_blank">Mozilla Bug 673468</a>
  15   </body>
  16
  17   <!-- test code goes here -->
  18   <script type="application/javascript">
  19   <![CDATA[
  20   /** Test for Bug 673468 **/
  21   SimpleTest.waitForExplicitFinish();
  22   SpecialPowers.DOMWindowUtils.garbageCollect();
  23
  24   let get_live_dom = function () {
  25     return document.getElementById("testelem");
  26   };
  27
  28   let wrappers_as_keys_test = function () {
  29     let e = new MessageEvent("foo", { bubbles: false, cancellable: false,
  30                                       data: { dummy: document.createXULElement("foo") }});
  31     window.eeeevent = e;
  32
  33     let live_dom = e.data.dummy;
  34     let dead_dom = document.createElementNS("http://www.w3.org/1999/xhtml", "div");
  35     let dead_child = document.createElementNS("http://www.w3.org/1999/xhtml", "div");
  36     dead_dom.appendChild(dead_child);
  37     is(dead_dom.children.length, 1, "children have wrong length");
  38     let wrappee = {};
  39
  40     dead_dom.abcxyz = wrappee;
  41
  42     let system = Cc["@mozilla.org/systemprincipal;1"].createInstance();
  43     let sandbox = Cu.Sandbox(system);
  44
  45     sandbox.wrapper = wrappee;
  46     sandbox.value = dead_dom;
  47     let map = Cu.evalInSandbox("wm = new WeakMap(); wm.set(wrapper, value); wm", sandbox);
  48     sandbox.wrapper = null;
  49     sandbox.value = null;
  50
  51     live_dom.xyzabc = {wrappee, m: map, sb: sandbox};
  52
  53     let key = ChromeUtils.nondeterministicGetWeakMapKeys(map)[0];
  54     let value = map.get(key);
  55     is(value.children.length, 1, "children have wrong length");
  56   }
  57
  58   wrappers_as_keys_test();
  59
  60   let check_wrappers_as_keys = function () {
  61     let live_dom = window.eeeevent.data.dummy;
  62     let live_map = live_dom.xyzabc.m;
  63     is(ChromeUtils.nondeterministicGetWeakMapKeys(live_map).length, 1,
  64       "Map should not be empty.");
  65     let key = ChromeUtils.nondeterministicGetWeakMapKeys(live_map)[0];
  66     let value = live_map.get(key);
  67     is(value.children.length, 1, "children have wrong length");
  68   }
  69
  70   Cu.schedulePreciseGC(function () {
  71     SpecialPowers.DOMWindowUtils.cycleCollect();
  72     SpecialPowers.DOMWindowUtils.garbageCollect();
  73
  74     check_wrappers_as_keys();
  75     SimpleTest.finish();
  76   });
  77
  78   ]]>
  79   </script>
  80 </window>