Implement a test for DefaultComponentInstallerTest

components/component_updater/component_updater_service.h

 // 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 COMPONENTS_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 #define COMPONENTS_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
+#include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/version.h"
 #include "components/update_client/update_client.h"
 #include "url/gurl.h"
 
 class ComponentsUI;
 class SupervisedUserWhitelistService;
 
 namespace base {
 class DictionaryValue;
@@ skipping 94 matching lines @@
 
   virtual ~ComponentUpdateService() {}
 
  private:
   // Returns details about registered component in the |item| parameter. The
   // function returns true in case of success and false in case of errors.
   virtual bool GetComponentDetails(const std::string& id,
                                    CrxUpdateItem* item) const = 0;
 
   friend class ::ComponentsUI;
+  FRIEND_TEST_ALL_PREFIXES(DefaultComponentInstallerTest, RegisterComponent);
 };
 
 using ServiceObserver = ComponentUpdateService::Observer;
 
 class OnDemandUpdater {
  public:
   virtual ~OnDemandUpdater() {}
 
  private:
   friend class OnDemandTester;
@@ skipping 11 matching lines @@
   virtual bool OnDemandUpdate(const std::string& id) = 0;
 };
 
 // Creates the component updater.
 std::unique_ptr<ComponentUpdateService> ComponentUpdateServiceFactory(
     const scoped_refptr<Configurator>& config);
 
 }  // namespace component_updater
 
 #endif  // COMPONENTS_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_