Add a Create method to DesktopNotificationHandler and stubs for the notification objects.

chrome/browser/task_manager/task_manager_notification_browsertest.cc

+// Copyright (c) 2011 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.
+
+#include "chrome/browser/task_manager/task_manager.h"
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/extension_browsertest.h"
+#include "chrome/browser/notifications/desktop_notification_service.h"
+#include "chrome/browser/notifications/notification.h"
+#include "chrome/browser/notifications/notification_test_util.h"
+#include "chrome/browser/notifications/notification_ui_manager.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/test/in_process_browser_test.h"
+#include "chrome/test/ui_test_utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+class ResourceChangeObserver : public TaskManagerModelObserver {
+ public:
+  ResourceChangeObserver(const TaskManagerModel* model,
+                         int target_resource_count)
+      : model_(model),
+        target_resource_count_(target_resource_count) {
+  }
+
+  virtual void OnModelChanged() {
+    OnResourceChange();
+  }
+
+  virtual void OnItemsChanged(int start, int length) {
+    OnResourceChange();
+  }
+
+  virtual void OnItemsAdded(int start, int length) {
+    OnResourceChange();
+  }
+
+  virtual void OnItemsRemoved(int start, int length) {
+    OnResourceChange();
+  }
+
+ private:
+  void OnResourceChange() {
+    if (model_->ResourceCount() == target_resource_count_)
+      MessageLoopForUI::current()->Quit();
+  }
+
+  const TaskManagerModel* model_;
+  const int target_resource_count_;
+};
+
+}  // namespace
+
+class TaskManagerNotificationBrowserTest : public ExtensionBrowserTest {
+ public:
+  TaskManagerModel* model() const {
+    return TaskManager::GetInstance()->model();
+  }
+
+  void WaitForResourceChange(int target_count) {
+    if (model()->ResourceCount() == target_count)
+      return;
+    ResourceChangeObserver observer(model(), target_count);
+    model()->AddObserver(&observer);
+    ui_test_utils::RunMessageLoop();
+    model()->RemoveObserver(&observer);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(TaskManagerNotificationBrowserTest,
+                       NoticeNotificationChanges) {
+  EXPECT_EQ(0, model()->ResourceCount());
+
+  // Show the task manager.
+  browser()->window()->ShowTaskManager();
+  // Expect to see the browser and the New Tab Page renderer.
+  WaitForResourceChange(2);
+
+  // Show a notification.
+  NotificationUIManager* notifications =
+      g_browser_process->notification_ui_manager();
+
+  string16 content = DesktopNotificationService::CreateDataUrl(
+      GURL(), ASCIIToUTF16("Hello World!"), string16(),
+      WebKit::WebTextDirectionDefault);
+
+  scoped_refptr<NotificationDelegate> del1(new MockNotificationDelegate("n1"));
+  Notification n1(
+      GURL(), GURL(content), ASCIIToUTF16("Test 1"), string16(), del1.get());
+  scoped_refptr<NotificationDelegate> del2(new MockNotificationDelegate("n2"));
+  Notification n2(
+      GURL(), GURL(content), ASCIIToUTF16("Test 2"), string16(), del2.get());
+
+  notifications->Add(n1, browser()->profile());
+  WaitForResourceChange(3);
+  notifications->Add(n2, browser()->profile());
+  WaitForResourceChange(4);
+  notifications->CancelById(n1.notification_id());
+  WaitForResourceChange(3);
+  notifications->CancelById(n2.notification_id());
+  WaitForResourceChange(2);
+}