text: // 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.
  
  #include "chromeos/dbus/services/cros_dbus_service.h"
  
  #include <memory>
  #include <utility>
  
  #include "base/bind.h"
  #include "base/memory/ref_counted.h"
  #include "dbus/message.h"
  #include "dbus/mock_bus.h"
  #include "dbus/mock_exported_object.h"
  #include "dbus/mock_object_proxy.h"
  #include "dbus/object_path.h"
  #include "testing/gmock/include/gmock/gmock.h"
  #include "testing/gtest/include/gtest/gtest.h"
  #include "third_party/cros_system_api/dbus/service_constants.h"
  
  using ::testing::_;
  using ::testing::Eq;
  using ::testing::InSequence;
  using ::testing::Invoke;
  using ::testing::Mock;
  using ::testing::Return;
  
  namespace chromeos {
  
  class MockProxyResolutionService
      : public CrosDBusService::ServiceProviderInterface {
   public:
    MOCK_METHOD1(Start, void(scoped_refptr<dbus::ExportedObject>
                             exported_object));
  };
  
  class CrosDBusServiceTest : public testing::Test {
   public:
    CrosDBusServiceTest() = default;
  
    // Creates an instance of CrosDBusService with mocks injected.
    void SetUp() override {
      // Create a mock bus.
      dbus::Bus::Options options;
      options.bus_type = dbus::Bus::SYSTEM;
      mock_bus_ = new dbus::MockBus(options);
  
      // ShutdownAndBlock() will be called in TearDown().
      EXPECT_CALL(*mock_bus_.get(), ShutdownAndBlock()).WillOnce(Return());
  
      // Create a mock exported object.
      const dbus::ObjectPath kObjectPath("/org/example/TestService");
      mock_exported_object_ =
          new dbus::MockExportedObject(mock_bus_.get(), kObjectPath);
  
      // |mock_bus_|'s GetExportedObject() will return mock_exported_object_|
      // for the given service name and the object path.
      EXPECT_CALL(*mock_bus_.get(), GetExportedObject(kObjectPath))
          .WillRepeatedly(Return(mock_exported_object_.get()));
  
      // Create a mock proxy resolution service.
      auto mock_proxy_resolution_service_provider =
          std::make_unique<MockProxyResolutionService>();
  
      const char kServiceName[] = "org.example.TestService";
  
      {
        // |mock_exported_object_|'s Start method should be called before
        // RequestOwnership: https://crbug.com/874978
        InSequence export_methods_before_taking_ownership;
        EXPECT_CALL(*mock_proxy_resolution_service_provider,
                    Start(Eq(mock_exported_object_)))
            .WillOnce(Return());
        EXPECT_CALL(
            *mock_bus_.get(),
            RequestOwnership(kServiceName,
                             dbus::Bus::REQUIRE_PRIMARY_ALLOW_REPLACEMENT, _))
            .Times(1);
      }
  
      // Initialize the cros service with the mocks injected.
      CrosDBusService::ServiceProviderList service_providers;
      service_providers.push_back(
          std::move(mock_proxy_resolution_service_provider));
      cros_dbus_service_ = CrosDBusService::CreateRealImpl(
          mock_bus_.get(), kServiceName, kObjectPath,
          std::move(service_providers));
    }
  
    void TearDown() override {
      cros_dbus_service_.reset();
      mock_bus_->ShutdownAndBlock();
  
      // Clear expectations to allow |mock_bus_| to be destroyed:
      // http://go/soverflow/10286514
      EXPECT_TRUE(Mock::VerifyAndClearExpectations(mock_bus_.get()));
    }
  
   protected:
    scoped_refptr<dbus::MockBus> mock_bus_;
    scoped_refptr<dbus::MockExportedObject> mock_exported_object_;
    std::unique_ptr<CrosDBusService> cros_dbus_service_;
  };
  
  TEST_F(CrosDBusServiceTest, Start) {
    // Simply start the service and see if mock expectations are met:
    // - The service object is exported by GetExportedObject()
    // - The proxy resolution service is started.
  }
  
  }  // namespace chromeos
  