chrome/browser/ui/panels/test_panel_notification_observer.h

   1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_UI_PANELS_TEST_PANEL_NOTIFICATION_OBSERVER_H_
   6 #define CHROME_BROWSER_UI_PANELS_TEST_PANEL_NOTIFICATION_OBSERVER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "content/public/browser/notification_observer.h"
  10 #include "content/public/browser/notification_registrar.h"
  11
  12 namespace content {
  13 class MessageLoopRunner;
  14 class NotificationSource;
  15 }
  16
  17 // Common base class for a custom notification observer that waits
  18 // on a notification until an expected state is achieved.
  19 // Modeled after ui_test_utils notification observers, but can handle
  20 // more than one occurrence of the notification.
  21 class TestPanelNotificationObserver : public content::NotificationObserver {
  22  public:
  23   TestPanelNotificationObserver(int notification,
  24                                 const content::NotificationSource& source);
  25   ~TestPanelNotificationObserver() override;
  26
  27   // Wait until the expected state is achieved.
  28   void Wait();
  29
  30   // content::NotificationObserver:
  31   void Observe(int type,
  32                const content::NotificationSource& source,
  33                const content::NotificationDetails& details) override;
  34
  35  protected:
  36   virtual bool AtExpectedState() = 0;
  37
  38   bool seen_;  // true after transition to expected state has been seen
  39   bool running_;  // indicates whether message loop is running
  40   content::NotificationRegistrar registrar_;
  41   scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(TestPanelNotificationObserver);
  44 };
  45
  46 #endif  // CHROME_BROWSER_UI_PANELS_TEST_PANEL_NOTIFICATION_OBSERVER_H_