chrome/test/data/extensions/api_test/crazy_extension/background.js

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // This test is for bizarre things that extensions probably will do. We just
   6 // need to ensure that behaviour is predictable.
   7
   8 chrome.test.runTests([
   9   function accessNonexistentIframe() {
  10     var iframe = document.createElement("iframe");
  11     iframe.src = document.location;
  12     var iteration = 0;
  13     iframe.addEventListener('load', function() {
  14       switch (iteration) {
  15         case 0: {
  16           // First test is that chrome.app doesn't even get defined if it was
  17           // never accessed.
  18           var iframeChrome = iframe.contentWindow.chrome;
  19           document.body.removeChild(iframe);
  20           chrome.test.assertEq(undefined, iframeChrome.app);
  21           document.body.appendChild(iframe);
  22           break;
  23         }
  24         case 1: {
  25           // Second test is that it does if accessed before removal.
  26           var iframeChrome = iframe.contentWindow.chrome;
  27           var iframeChromeApp = iframeChrome.app;
  28           chrome.test.assertTrue(typeof(iframeChromeApp) == 'object');
  29           document.body.removeChild(iframe);
  30           chrome.test.assertTrue(typeof(iframeChrome.app) == 'object');
  31           document.body.appendChild(iframe);
  32           break;
  33         }
  34         case 2: {
  35           // Third test is that accessing API methods doesn't crash the
  36           // renderer if the frame doesn't exist anymore.
  37           var iframeChromeApp = iframe.contentWindow.chrome.app;
  38           document.body.removeChild(iframe);
  39           chrome.test.assertEq(undefined, iframeChromeApp.getDetails());
  40           chrome.test.succeed();
  41           break;
  42         }
  43       }
  44       iteration++;
  45     });
  46     document.body.appendChild(iframe);
  47   }
  48 ]);