options: fix content settings exceptions dialog regression.

chrome/browser/ui/webui/options/content_settings_exception_area_browsertest.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * TestFixture for content settings exception area WebUI testing.
  * @extends {testing.Test}
  * @constructor
  */
 function ContentSettingsExceptionAreaWebUITest() {}
 
 ContentSettingsExceptionAreaWebUITest.prototype = {
   __proto__: testing.Test.prototype,
 
-  /**
-   * Browse to the content settings exception area.
-   */
+  /** @override */
   browsePreload: 'chrome://settings-frame/contentExceptions',
 };
 
 GEN('#if defined(OS_CHROMEOS)');
 GEN('#define MAYBE_testOpenContentSettingsExceptionArea ' +
         'DISABLED_testOpenContentSettingsExceptionArea');
 GEN('#else');
 GEN('#define MAYBE_testOpenContentSettingsExceptionArea ' +
         'testOpenContentSettingsExceptionArea');
 GEN('#endif  // defined(OS_CHROMEOS)');
 // Test opening the content settings exception area has correct location.
 TEST_F('ContentSettingsExceptionAreaWebUITest',
-       'MAYBE_testOpenContentSettingsExceptionArea',
-       function() {
-         assertEquals(this.browsePreload, document.location.href);
-       });
+       'MAYBE_testOpenContentSettingsExceptionArea', function() {
+  assertEquals(this.browsePreload, document.location.href);
+});
+
+/**
+ * A class to asynchronously test the content settings exception area dialog.
+ * @extends {testing.Test}
+ * @constructor
+ */
+function ContentSettingsExceptionsAreaAsyncWebUITest() {}
+
+ContentSettingsExceptionsAreaAsyncWebUITest.prototype = {
+  __proto__: testing.Test.prototype,
+
+  /** @override */
+  browsePreload: 'chrome://settings-frame/contentExceptions',
+
+  /** @override */
+  isAsync: true,
+};
+
+// Adds and removes a location content setting exception.
+TEST_F('ContentSettingsExceptionsAreaAsyncWebUITest',
+       'testAddRemoveLocationExceptions', function() {
+  assertEquals(this.browsePreload, document.location.href);
+
+  /** @const */ var origin = 'http://google.com:80';
+  /** @const */ var setExceptions = ContentSettings.setExceptions;
+
+  var list = ContentSettings.getExceptionsList('cookies', 'normal');
+  assertEquals(1, list.items.length);
+
+  var setExceptionsCounter = 0;
+  var setExceptionsCallback = function() {
+    setExceptionsCounter++;
+    if (setExceptionsCounter == 1) {
+      // The first item is now the exception (edit items are always last).
+      expectEquals('block', list.dataModel.item(0).setting);
+      expectEquals(origin, list.dataModel.item(0).origin);
+
+      // Delete the item and verify it worked.
+      list.deleteItemAtIndex(0);
+    } else if (setExceptionsCounter == 2) {
+      // Verify the item was deleted, restore the original method, and finish.
+      expectEquals(1, list.items.length);
+      ContentSettings.setExceptions = setExceptions;
+      testDone();
+    }
+  };
+
+  // NOTE: if this test doesn't succeed, |ContentSettings.setExceptions| may not
+  // be restored to its original method. I know no easy way to fix this.
+  ContentSettings.setExceptions = function() {
+    setExceptions.apply(ContentSettings, arguments);
+    setExceptionsCallback();
+  };
+
+  // Add an item to the location exception area to start the test.
+  list.items[0].finishEdit(origin, 'block');
+});