// Copyright 2014 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.

#ifndef EXTENSIONS_BROWSER_TEST_EXTENSION_REGISTRY_OBSERVER_H_
#define EXTENSIONS_BROWSER_TEST_EXTENSION_REGISTRY_OBSERVER_H_

#include "base/scoped_observer.h"
#include "extensions/browser/extension_registry_observer.h"

namespace extensions {
class ExtensionRegistry;

// A helper class that listen for ExtensionRegistry notifications.
class TestExtensionRegistryObserver : public ExtensionRegistryObserver {
 public:
  explicit TestExtensionRegistryObserver(ExtensionRegistry* registry,
                                         const std::string& extension_id);
  virtual ~TestExtensionRegistryObserver();

  void WaitForExtensionWillBeInstalled();
  void WaitForExtensionUninstalled();
  void WaitForExtensionLoaded();
  void WaitForExtensionUnloaded();

 private:
  class Waiter;

  // ExtensionRegistryObserver.
  virtual void OnExtensionWillBeInstalled(
      content::BrowserContext* browser_context,
      const Extension* extension,
      bool is_update,
      bool from_ephemeral,
      const std::string& old_name) OVERRIDE;
  virtual void OnExtensionUninstalled(
      content::BrowserContext* browser_context,
      const Extension* extension,
      extensions::UninstallReason reason) OVERRIDE;
  virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
                                 const Extension* extension) OVERRIDE;
  virtual void OnExtensionUnloaded(
      content::BrowserContext* browser_context,
      const Extension* extension,
      UnloadedExtensionInfo::Reason reason) OVERRIDE;

  scoped_ptr<Waiter> will_be_installed_waiter_;
  scoped_ptr<Waiter> uninstalled_waiter_;
  scoped_ptr<Waiter> loaded_waiter_;
  scoped_ptr<Waiter> unloaded_waiter_;

  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
      extension_registry_observer_;

  std::string extension_id_;

  DISALLOW_COPY_AND_ASSIGN(TestExtensionRegistryObserver);
};

}  // namespace extensions

#endif  // EXTENSIONS_BROWSER_TEST_EXTENSION_REGISTRY_OBSERVER_H_