js/xpconnect/tests/chrome/test_windowProxyDeadWrapper.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=1223372
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Test for Bug 1223372</title>
   9   <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="chrome://global/skin"/>
  11   <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
  12   <script type="application/javascript">
  13
  14 /** Test for Bug 1223372 **/
  15 const {TestUtils} = ChromeUtils.importESModule(
  16   "resource://testing-common/TestUtils.sys.mjs"
  17 );
  18
  19 async function go() {
  20     SimpleTest.waitForExplicitFinish();
  21     await SpecialPowers.pushPrefEnv({"set": [["security.allow_eval_with_system_principal",
  22                                              true]]});
  23
  24     var frame = $('subframe');
  25     frame.onload = null;
  26
  27     var w = frame.contentWindow;
  28
  29     w.eval("checkDead = function() { return Components.utils.isDeadWrapper(this); };");
  30     var checkDead = w.checkDead;
  31
  32     w.eval("getObject = function() { return {}; }");
  33     var getObject = w.getObject;
  34
  35     ok(!checkDead(), "WindowProxy shouldn't be dead yet");
  36
  37     // Load a content page in the chrome frame.
  38     w.location = "https://example.org/tests/js/xpconnect/tests/mochitest/file_empty.html";
  39     tryWindow();
  40
  41     function tryWindow() {
  42         if (w.document.title != 'empty test page') {
  43             info("Document not loaded yet - retrying");
  44             SimpleTest.executeSoon(tryWindow);
  45             return;
  46         }
  47
  48         let winID = w.docShell.outerWindowID;
  49         // Remove the frame. This will nuke the WindowProxy wrapper from our chrome
  50         // document's global, so evaluating 'this' in it will return a dead wrapper
  51         // once the window is destroyed.
  52         frame.remove();
  53
  54         TestUtils.topicObserved("outer-window-nuked", (subject) => {
  55             let id = subject.QueryInterface(Ci.nsISupportsPRUint64).data;
  56             return id == winID;
  57         }).then(() => {
  58             ok(checkDead(), "Expected a dead object wrapper");
  59
  60             // Wrapping the Window should return a dead wrapper now.
  61             var global = Cu.getGlobalForObject(getObject());
  62             ok(Cu.isDeadWrapper(global),
  63                "Expected a dead wrapper when requesting the window's global");
  64
  65             SimpleTest.finish();
  66         });
  67     }
  68 }
  69
  70   </script>
  71 </head>
  72 <body>
  73 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1223372">Mozilla Bug 1223372</a>
  74
  75 <iframe id="subframe" src="./file_empty.html" onload="go()"></iframe>
  76
  77 </body>
  78 </html>