third_party/WebKit/LayoutTests/fast/dom/navigator-detached-no-crash.html

   1 <!DOCTYPE html>
   2 <html>
   3 <head>
   4 <script src="../../resources/testharness.js"></script>
   5 <script src="../../resources/testharnessreport.js"></script>
   6 </head>
   7 <body>
   8   <iframe id="subframe" src="about:blank"></iframe>
   9 <script>
  10
  11 var testNavigatorOnLoad = async_test("Accessing a navigator object that just got removed does not crash.")
  12 var testNavigatorLater = async_test("Accessing a navigator object that got removed some time before does not crash.")
  13
  14 // Reference to the removed navigator object.
  15 var oldNav = null;
  16
  17 function gc() {
  18   if (window.GCController) {
  19     GCController.collect();
  20   } else {
  21     for (var i = 0; i < 10000; i++) {
  22       var s = new String("abc");
  23     }
  24   }
  25 }
  26
  27 function test() {
  28   // Keep a reference of the navigator and remove the frame.
  29   oldNav = window.frames[0].navigator;
  30   var frame = document.getElementById("subframe");
  31   frame.parentNode.removeChild(frame);
  32
  33   if (window.GCController)
  34     window.GCController.collect();
  35
  36   // Check once immediately.
  37   testNavigatorOnLoad.step(function() {
  38     check_navigator();
  39   });
  40   testNavigatorOnLoad.done();
  41
  42   gc();
  43
  44   // Check one more time later, when the frame is likely to be destroyed.
  45   setTimeout(function() {
  46     testNavigatorLater.step(function() {
  47       check_navigator();
  48     });
  49     testNavigatorLater.done();
  50   }, 200);
  51 }
  52
  53 function check_navigator() {
  54   for (p in oldNav) {
  55     if (typeof oldNav[p] == 'function') {
  56       try {
  57         var v = oldNav[p]();
  58         assert_true(true, "navigator."+p+"() is OK");
  59       } catch(err) {
  60         // Some function call will asserts, the assert shouldn't make the test fail.
  61         assert_true(true, "navigator."+p+"() threw err "+err);
  62       }
  63     } else {
  64       var v = oldNav[p];
  65       assert_true(true, "navigator."+p+" is OK");
  66     }
  67   }
  68 }
  69
  70 window.addEventListener('load', test);
  71
  72 </script>
  73
  74 </body>
  75 </html>