// Copyright (c) 2012 The Chromium OS 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 "shill/device.h"

#include <ctype.h>
#include <sys/socket.h>
#include <linux/if.h>  // Needs typedefs from sys/socket.h.

#include <map>
#include <string>
#include <vector>

#include <base/basictypes.h>
#include <base/bind.h>
#include <base/callback.h>
#include <base/memory/weak_ptr.h>
#include <chromeos/dbus/service_constants.h>
#include <dbus-c++/dbus.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include "shill/dbus_adaptor.h"
#include "shill/dhcp_provider.h"
#include "shill/event_dispatcher.h"
#include "shill/mock_adaptors.h"
#include "shill/mock_connection.h"
#include "shill/mock_connection_health_checker.h"
#include "shill/mock_control.h"
#include "shill/mock_device.h"
#include "shill/mock_device_info.h"
#include "shill/mock_dhcp_config.h"
#include "shill/mock_dhcp_provider.h"
#include "shill/mock_glib.h"
#include "shill/mock_ip_address_store.h"
#include "shill/mock_ipconfig.h"
#include "shill/mock_link_monitor.h"
#include "shill/mock_manager.h"
#include "shill/mock_metrics.h"
#include "shill/mock_portal_detector.h"
#include "shill/mock_rtnl_handler.h"
#include "shill/mock_service.h"
#include "shill/mock_store.h"
#include "shill/mock_traffic_monitor.h"
#include "shill/portal_detector.h"
#include "shill/property_store_unittest.h"
#include "shill/static_ip_parameters.h"
#include "shill/technology.h"
#include "shill/traffic_monitor.h"

using base::Bind;
using base::Callback;
using std::map;
using std::string;
using std::vector;
using ::testing::_;
using ::testing::AnyNumber;
using ::testing::AtLeast;
using ::testing::DefaultValue;
using ::testing::Invoke;
using ::testing::Mock;
using ::testing::NiceMock;
using ::testing::Return;
using ::testing::ReturnRef;
using ::testing::StrictMock;
using ::testing::Test;
using ::testing::Values;

namespace shill {

class TestDevice : public Device {
 public:
  TestDevice(ControlInterface *control_interface,
             EventDispatcher *dispatcher,
             Metrics *metrics,
             Manager *manager,
             const std::string &link_name,
             const std::string &address,
             int interface_index,
             Technology::Identifier technology)
      : Device(control_interface, dispatcher, metrics, manager, link_name,
               address, interface_index, technology) {}
  ~TestDevice() {}
  virtual void Start(Error *error,
                     const EnabledStateChangedCallback &callback) {
    DCHECK(error);
  }
  virtual void Stop(Error *error,
                    const EnabledStateChangedCallback &callback) {
    DCHECK(error);
  }
};

class DeviceTest : public PropertyStoreTest {
 public:
  DeviceTest()
      : device_(new TestDevice(control_interface(),
                               dispatcher(),
                               NULL,
                               manager(),
                               kDeviceName,
                               kDeviceAddress,
                               kDeviceInterfaceIndex,
                               Technology::kUnknown)),
        device_info_(control_interface(), NULL, NULL, NULL),
        metrics_(dispatcher()) {
    DHCPProvider::GetInstance()->glib_ = glib();
    DHCPProvider::GetInstance()->control_interface_ = control_interface();
    DHCPProvider::GetInstance()->dispatcher_ = dispatcher();
  }
  virtual ~DeviceTest() {}

  virtual void SetUp() {
    device_->metrics_ = &metrics_;
    device_->rtnl_handler_ = &rtnl_handler_;
  }

 protected:
  static const char kDeviceName[];
  static const char kDeviceAddress[];
  static const int kDeviceInterfaceIndex;

  void OnIPConfigUpdated(const IPConfigRefPtr &ipconfig, bool success) {
    device_->OnIPConfigUpdated(ipconfig, success);
  }

  void SelectService(const ServiceRefPtr service) {
    device_->SelectService(service);
  }

  void SetConnection(ConnectionRefPtr connection) {
    device_->connection_ = connection;
  }

  void SetLinkMonitor(LinkMonitor *link_monitor) {
    device_->set_link_monitor(link_monitor);  // Passes ownership.
  }

  bool HasLinkMonitor() {
    return device_->link_monitor();
  }

  bool StartLinkMonitor() {
    return device_->StartLinkMonitor();
  }

  void StopLinkMonitor() {
    device_->StopLinkMonitor();
  }

  uint64 GetLinkMonitorResponseTime(Error *error) {
    return device_->GetLinkMonitorResponseTime(error);
  }

  void SetTrafficMonitor(TrafficMonitor *traffic_monitor) {
    device_->set_traffic_monitor(traffic_monitor);  // Passes ownership.
  }

  bool StartTrafficMonitor() {
    return device_->StartTrafficMonitor();
  }

  void StopTrafficMonitor() {
    device_->StopTrafficMonitor();
  }

  void SetManager(Manager *manager) {
    device_->manager_ = manager;
  }

  MockControl control_interface_;
  DeviceRefPtr device_;
  MockDeviceInfo device_info_;
  MockMetrics metrics_;
  StrictMock<MockRTNLHandler> rtnl_handler_;
};

const char DeviceTest::kDeviceName[] = "testdevice";
const char DeviceTest::kDeviceAddress[] = "address";
const int DeviceTest::kDeviceInterfaceIndex = 0;

TEST_F(DeviceTest, Contains) {
  EXPECT_TRUE(device_->store().Contains(flimflam::kNameProperty));
  EXPECT_FALSE(device_->store().Contains(""));
}

TEST_F(DeviceTest, GetProperties) {
  map<string, ::DBus::Variant> props;
  Error error(Error::kInvalidProperty, "");
  ::DBus::Error dbus_error;
  DBusAdaptor::GetProperties(device_->store(), &props, &dbus_error);
  ASSERT_FALSE(props.find(flimflam::kNameProperty) == props.end());
  EXPECT_EQ(props[flimflam::kNameProperty].reader().get_string(),
            string(kDeviceName));
}

// Note: there are currently no writeable Device properties that
// aren't registered in a subclass.
TEST_F(DeviceTest, SetReadOnlyProperty) {
  ::DBus::Error error;
  // Ensure that an attempt to write a R/O property returns InvalidArgs error.
  EXPECT_FALSE(DBusAdaptor::SetProperty(device_->mutable_store(),
                                        flimflam::kAddressProperty,
                                        PropertyStoreTest::kStringV,
                                        &error));
  EXPECT_EQ(invalid_args(), error.name());
}

TEST_F(DeviceTest, ClearReadOnlyProperty) {
  ::DBus::Error error;
  EXPECT_FALSE(DBusAdaptor::SetProperty(device_->mutable_store(),
                                        flimflam::kAddressProperty,
                                        PropertyStoreTest::kStringV,
                                        &error));
}

TEST_F(DeviceTest, ClearReadOnlyDerivedProperty) {
  ::DBus::Error error;
  EXPECT_FALSE(DBusAdaptor::SetProperty(device_->mutable_store(),
                                        flimflam::kIPConfigsProperty,
                                        PropertyStoreTest::kStringsV,
                                        &error));
}

TEST_F(DeviceTest, DestroyIPConfig) {
  ASSERT_FALSE(device_->ipconfig_.get());
  device_->ipconfig_ = new IPConfig(control_interface(), kDeviceName);
  device_->DestroyIPConfig();
  ASSERT_FALSE(device_->ipconfig_.get());
}

TEST_F(DeviceTest, DestroyIPConfigNULL) {
  ASSERT_FALSE(device_->ipconfig_.get());
  device_->DestroyIPConfig();
  ASSERT_FALSE(device_->ipconfig_.get());
}

TEST_F(DeviceTest, AcquireIPConfig) {
  device_->ipconfig_ = new IPConfig(control_interface(), "randomname");
  scoped_ptr<MockDHCPProvider> dhcp_provider(new MockDHCPProvider());
  device_->dhcp_provider_ = dhcp_provider.get();
  scoped_refptr<MockDHCPConfig> dhcp_config(new MockDHCPConfig(
                                                    control_interface(),
                                                    kDeviceName));
  EXPECT_CALL(*dhcp_provider, CreateConfig(_, _, _, _))
      .WillOnce(Return(dhcp_config));
  EXPECT_CALL(*dhcp_config, RequestIP())
      .WillOnce(Return(false));
  EXPECT_FALSE(device_->AcquireIPConfig());
  ASSERT_TRUE(device_->ipconfig_.get());
  EXPECT_EQ(kDeviceName, device_->ipconfig_->device_name());
  EXPECT_FALSE(device_->ipconfig_->update_callback_.is_null());
  device_->dhcp_provider_ = NULL;
}

TEST_F(DeviceTest, Load) {
  NiceMock<MockStore> storage;
  const string id = device_->GetStorageIdentifier();
  EXPECT_CALL(storage, ContainsGroup(id)).WillOnce(Return(true));
  EXPECT_CALL(storage, GetBool(id, Device::kStoragePowered, _))
      .WillOnce(Return(true));
  EXPECT_CALL(storage, GetUint64(id, Device::kStorageReceiveByteCount, _))
      .WillOnce(Return(true));
  EXPECT_CALL(storage, GetUint64(id, Device::kStorageTransmitByteCount, _))
      .WillOnce(Return(true));
  EXPECT_TRUE(device_->Load(&storage));
}

TEST_F(DeviceTest, Save) {
  NiceMock<MockStore> storage;
  const string id = device_->GetStorageIdentifier();
  EXPECT_CALL(storage, SetString(id, Device::kStorageIPConfigs, _))
      .WillOnce(Return(true));
  EXPECT_CALL(storage, SetBool(id, Device::kStoragePowered, _))
      .WillOnce(Return(true));
  scoped_refptr<MockIPConfig> ipconfig = new MockIPConfig(control_interface(),
                                                          kDeviceName);
  EXPECT_CALL(*ipconfig.get(), Save(_, _))
      .WillOnce(Return(true));
  device_->ipconfig_ = ipconfig;
  EXPECT_CALL(storage, SetUint64(id, Device::kStorageReceiveByteCount, _))
      .WillOnce(Return(true));
  EXPECT_CALL(storage, SetUint64(id, Device::kStorageTransmitByteCount, _))
      .Times(AtLeast(true));
  EXPECT_TRUE(device_->Save(&storage));
}

TEST_F(DeviceTest, StorageIdGeneration) {
  string to_process("/device/stuff/0");
  ControlInterface::RpcIdToStorageId(&to_process);
  EXPECT_TRUE(isalpha(to_process[0]));
  EXPECT_EQ(string::npos, to_process.find('/'));
}

MATCHER(IsNullRefPtr, "") {
  return !arg;
}

MATCHER(NotNullRefPtr, "") {
  return arg;
}

TEST_F(DeviceTest, SelectedService) {
  EXPECT_FALSE(device_->selected_service_.get());
  device_->SetServiceState(Service::kStateAssociating);
  scoped_refptr<MockService> service(
      new StrictMock<MockService>(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  manager()));
  SelectService(service);
  EXPECT_TRUE(device_->selected_service_.get() == service.get());

  EXPECT_CALL(*service.get(), SetState(Service::kStateConfiguring));
  device_->SetServiceState(Service::kStateConfiguring);
  EXPECT_CALL(*service.get(), SetFailure(Service::kFailureOutOfRange));
  device_->SetServiceFailure(Service::kFailureOutOfRange);

  // Service should be returned to "Idle" state
  EXPECT_CALL(*service.get(), state())
    .WillOnce(Return(Service::kStateUnknown));
  EXPECT_CALL(*service.get(), SetState(Service::kStateIdle));
  EXPECT_CALL(*service.get(), SetConnection(IsNullRefPtr()));
  SelectService(NULL);

  // A service in the "Failure" state should not be reset to "Idle"
  SelectService(service);
  EXPECT_CALL(*service.get(), state())
    .WillOnce(Return(Service::kStateFailure));
  EXPECT_CALL(*service.get(), SetConnection(IsNullRefPtr()));
  SelectService(NULL);
}

TEST_F(DeviceTest, IPConfigUpdatedFailure) {
  scoped_refptr<MockService> service(
      new StrictMock<MockService>(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  manager()));
  SelectService(service);
  EXPECT_CALL(*service.get(), DisconnectWithFailure(Service::kFailureDHCP, _));
  EXPECT_CALL(*service.get(), SetConnection(IsNullRefPtr()));
  OnIPConfigUpdated(NULL, false);
}

TEST_F(DeviceTest, IPConfigUpdatedFailureWithStatic) {
  scoped_refptr<MockService> service(
      new StrictMock<MockService>(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  manager()));
  SelectService(service);
  service->static_ip_parameters_.args_.SetString(
      flimflam::kAddressProperty, "1.1.1.1");
  service->static_ip_parameters_.args_.SetInt(flimflam::kPrefixlenProperty, 16);
  EXPECT_CALL(*service.get(), SetState(_)).Times(0);
  EXPECT_CALL(*service.get(), SetConnection(_)).Times(0);
  OnIPConfigUpdated(NULL, false);
}

TEST_F(DeviceTest, IPConfigUpdatedSuccess) {
  scoped_refptr<MockService> service(
      new StrictMock<MockService>(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  manager()));
  SelectService(service);
  scoped_refptr<MockIPConfig> ipconfig = new MockIPConfig(control_interface(),
                                                          kDeviceName);
  EXPECT_CALL(*service.get(), SetState(Service::kStateConnected));
  EXPECT_CALL(*service.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service.get(), IsPortalDetectionDisabled())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service.get(), SetState(Service::kStateOnline));
  EXPECT_CALL(*service.get(), SetConnection(NotNullRefPtr()));
  OnIPConfigUpdated(ipconfig.get(), true);
}

TEST_F(DeviceTest, IPConfigUpdatedSuccessNoSelectedService) {
  // Make sure shill doesn't crash if a service is disabled immediately
  // after receiving its IP config (selected_service_ is NULL in this case).
  scoped_refptr<MockIPConfig> ipconfig = new MockIPConfig(control_interface(),
                                                          kDeviceName);
  SelectService(NULL);
  OnIPConfigUpdated(ipconfig.get(), true);
}

TEST_F(DeviceTest, SetEnabledPersistent) {
  EXPECT_FALSE(device_->enabled_);
  EXPECT_FALSE(device_->enabled_pending_);
  device_->enabled_persistent_ = false;
  StrictMock<MockManager> manager(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  glib());
  EXPECT_CALL(manager, UpdateDevice(_));
  SetManager(&manager);
  Error error;
  device_->SetEnabledPersistent(true, &error, ResultCallback());
  EXPECT_TRUE(device_->enabled_persistent_);
  EXPECT_TRUE(device_->enabled_pending_);
}

TEST_F(DeviceTest, Start) {
  EXPECT_FALSE(device_->running_);
  EXPECT_FALSE(device_->enabled_);
  EXPECT_FALSE(device_->enabled_pending_);
  device_->SetEnabled(true);
  EXPECT_TRUE(device_->running_);
  EXPECT_TRUE(device_->enabled_pending_);
  device_->OnEnabledStateChanged(ResultCallback(),
                                 Error(Error::kOperationFailed));
  EXPECT_FALSE(device_->enabled_pending_);
}

TEST_F(DeviceTest, Stop) {
  device_->enabled_ = true;
  device_->enabled_pending_ = true;
  device_->ipconfig_ = new IPConfig(&control_interface_, kDeviceName);
  scoped_refptr<MockService> service(
      new NiceMock<MockService>(&control_interface_,
                                dispatcher(),
                                metrics(),
                                manager()));
  SelectService(service);

  EXPECT_CALL(*service.get(), state()).
      WillRepeatedly(Return(Service::kStateConnected));
  EXPECT_CALL(*dynamic_cast<DeviceMockAdaptor *>(device_->adaptor_.get()),
              UpdateEnabled());
  EXPECT_CALL(*dynamic_cast<DeviceMockAdaptor *>(device_->adaptor_.get()),
              EmitBoolChanged(flimflam::kPoweredProperty, false));
  EXPECT_CALL(rtnl_handler_, SetInterfaceFlags(_, 0, IFF_UP));
  device_->SetEnabled(false);
  device_->OnEnabledStateChanged(ResultCallback(), Error());

  EXPECT_FALSE(device_->ipconfig_.get());
  EXPECT_FALSE(device_->selected_service_.get());
}

TEST_F(DeviceTest, Reset) {
  Error e;
  device_->Reset(&e, ResultCallback());
  EXPECT_EQ(Error::kNotSupported, e.type());
  EXPECT_EQ("Device doesn't support Reset.", e.message());
}

TEST_F(DeviceTest, ResumeWithIPConfig) {
  scoped_refptr<MockIPConfig> ipconfig =
      new MockIPConfig(control_interface(), kDeviceName);
  device_->set_ipconfig(ipconfig);
  EXPECT_CALL(*ipconfig, RenewIP());
  device_->OnAfterResume();
}

TEST_F(DeviceTest, ResumeWithoutIPConfig) {
  // Just test that we don't crash in this case.
  ASSERT_EQ(NULL, device_->ipconfig().get());
  device_->OnAfterResume();
}

TEST_F(DeviceTest, ResumeWithLinkMonitor) {
  MockLinkMonitor *link_monitor = new StrictMock<MockLinkMonitor>();
  SetLinkMonitor(link_monitor);  // Passes ownership.
  EXPECT_CALL(*link_monitor, OnAfterResume());
  device_->OnAfterResume();
}

TEST_F(DeviceTest, ResumeWithoutLinkMonitor) {
  // Just test that we don't crash in this case.
  EXPECT_FALSE(HasLinkMonitor());
  device_->OnAfterResume();
}

TEST_F(DeviceTest, LinkMonitor) {
  scoped_refptr<MockConnection> connection(
      new StrictMock<MockConnection>(&device_info_));
  MockManager manager(control_interface(),
                      dispatcher(),
                      metrics(),
                      glib());
  scoped_refptr<MockService> service(
      new StrictMock<MockService>(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  &manager));
  SelectService(service);
  SetConnection(connection.get());
  MockLinkMonitor *link_monitor = new StrictMock<MockLinkMonitor>();
  SetLinkMonitor(link_monitor);  // Passes ownership.
  SetManager(&manager);
  EXPECT_CALL(*link_monitor, Start()).Times(0);
  EXPECT_CALL(manager, IsTechnologyLinkMonitorEnabled(Technology::kUnknown))
      .WillOnce(Return(false))
      .WillRepeatedly(Return(true));
  EXPECT_FALSE(StartLinkMonitor());

  EXPECT_CALL(*link_monitor, Start())
      .WillOnce(Return(false))
      .WillOnce(Return(true));
  EXPECT_FALSE(StartLinkMonitor());
  EXPECT_TRUE(StartLinkMonitor());

  unsigned int kResponseTime = 123;
  EXPECT_CALL(*link_monitor, GetResponseTimeMilliseconds())
      .WillOnce(Return(kResponseTime));
  {
    Error error;
    EXPECT_EQ(kResponseTime, GetLinkMonitorResponseTime(&error));
    EXPECT_TRUE(error.IsSuccess());
  }
  StopLinkMonitor();
  {
    Error error;
    EXPECT_EQ(0, GetLinkMonitorResponseTime(&error));
    EXPECT_FALSE(error.IsSuccess());
  }
}

TEST_F(DeviceTest, LinkMonitorCancelledOnSelectService) {
  scoped_refptr<MockConnection> connection(
      new StrictMock<MockConnection>(&device_info_));
  MockManager manager(control_interface(),
                      dispatcher(),
                      metrics(),
                      glib());
  scoped_refptr<MockService> service(
      new StrictMock<MockService>(control_interface(),
                                  dispatcher(),
                                  metrics(),
                                  &manager));
  SelectService(service);
  SetConnection(connection.get());
  MockLinkMonitor *link_monitor = new StrictMock<MockLinkMonitor>();
  SetLinkMonitor(link_monitor);  // Passes ownership.
  SetManager(&manager);
  EXPECT_CALL(*service.get(), state())
      .WillOnce(Return(Service::kStateIdle));
  EXPECT_CALL(*service.get(), SetState(_));
  EXPECT_CALL(*service.get(), SetConnection(_));
  EXPECT_TRUE(HasLinkMonitor());
  SelectService(NULL);
  EXPECT_FALSE(HasLinkMonitor());
}

TEST_F(DeviceTest, StartTrafficMonitor) {
  MockTrafficMonitor *traffic_monitor = new StrictMock<MockTrafficMonitor>();
  SetTrafficMonitor(traffic_monitor);  // Passes ownership.

  EXPECT_CALL(*traffic_monitor, Start()).Times(0);
  EXPECT_FALSE(device_->traffic_monitor_enabled());
  EXPECT_FALSE(StartTrafficMonitor());

  device_->set_traffic_monitor_enabled(true);
  EXPECT_CALL(*traffic_monitor, Start()).Times(1);
  EXPECT_TRUE(device_->traffic_monitor_enabled());
  EXPECT_TRUE(StartTrafficMonitor());
}

TEST_F(DeviceTest, StopTrafficMonitor) {
  // Invoke Stop() without a traffic monitor set.
  EXPECT_FALSE(device_->traffic_monitor_.get());
  StopTrafficMonitor();
  EXPECT_FALSE(device_->traffic_monitor_.get());

  // Invoke Stop() with a traffic monitor set but without invoking Start().
  TrafficMonitor *traffic_monitor = new TrafficMonitor(device_, dispatcher());
  SetTrafficMonitor(traffic_monitor);  // Passes ownership.
  EXPECT_TRUE(device_->traffic_monitor_.get());
  StopTrafficMonitor();
  EXPECT_FALSE(device_->traffic_monitor_.get());

  // Invoke Stop() with a traffic monitor set but not enabled.
  traffic_monitor = new TrafficMonitor(device_, dispatcher());
  SetTrafficMonitor(traffic_monitor);  // Passes ownership.
  EXPECT_FALSE(device_->traffic_monitor_enabled());
  EXPECT_FALSE(StartTrafficMonitor());
  EXPECT_TRUE(device_->traffic_monitor_.get());
  StopTrafficMonitor();
  EXPECT_FALSE(device_->traffic_monitor_.get());

  // Invoke Stop() with a traffic monitor set and started.
  device_->set_traffic_monitor_enabled(true);
  EXPECT_TRUE(device_->traffic_monitor_enabled());
  EXPECT_TRUE(StartTrafficMonitor());
  EXPECT_TRUE(device_->traffic_monitor_.get());
  StopTrafficMonitor();
  EXPECT_FALSE(device_->traffic_monitor_.get());

  // Invoke Stop() again after the traffic monitor is stopped.
  StopTrafficMonitor();
  EXPECT_FALSE(device_->traffic_monitor_.get());
}

class DevicePortalDetectionTest : public DeviceTest {
 public:
  DevicePortalDetectionTest()
      : connection_(new StrictMock<MockConnection>(&device_info_)),
        manager_(control_interface(),
                 dispatcher(),
                 metrics(),
                 glib()),
        service_(new StrictMock<MockService>(control_interface(),
                                             dispatcher(),
                                             metrics(),
                                             &manager_)),
        portal_detector_(new StrictMock<MockPortalDetector>(connection_)) {}
    virtual ~DevicePortalDetectionTest() {}
  virtual void SetUp() {
    DeviceTest::SetUp();
    SelectService(service_);
    SetConnection(connection_.get());
    device_->portal_detector_.reset(portal_detector_);  // Passes ownership.
    SetManager(&manager_);
  }

 protected:
  static const int kPortalAttempts;

  bool StartPortalDetection() { return device_->StartPortalDetection(); }
  void StopPortalDetection() { device_->StopPortalDetection(); }

  void PortalDetectorCallback(const PortalDetector::Result &result) {
    device_->PortalDetectorCallback(result);
  }
  bool RequestPortalDetection() {
    return device_->RequestPortalDetection();
  }
  void SetServiceConnectedState(Service::ConnectState state) {
    device_->SetServiceConnectedState(state);
  }
  void ExpectPortalDetectorReset() {
    EXPECT_FALSE(device_->portal_detector_.get());
  }
  void ExpectPortalDetectorSet() {
    EXPECT_TRUE(device_->portal_detector_.get());
  }
  void ExpectPortalDetectorIsMock() {
    EXPECT_EQ(portal_detector_, device_->portal_detector_.get());
  }
  scoped_refptr<MockConnection> connection_;
  StrictMock<MockManager> manager_;
  scoped_refptr<MockService> service_;

  // Used only for EXPECT_CALL().  Object is owned by device.
  MockPortalDetector *portal_detector_;
};

const int DevicePortalDetectionTest::kPortalAttempts = 2;

TEST_F(DevicePortalDetectionTest, ServicePortalDetectionDisabled) {
  EXPECT_CALL(*service_.get(), IsPortalDetectionDisabled())
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  EXPECT_FALSE(StartPortalDetection());
}

TEST_F(DevicePortalDetectionTest, TechnologyPortalDetectionDisabled) {
  EXPECT_CALL(*service_.get(), IsPortalDetectionDisabled())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), IsPortalDetectionAuto())
      .WillOnce(Return(true));
  EXPECT_CALL(manager_, IsPortalDetectionEnabled(device_->technology()))
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  EXPECT_FALSE(StartPortalDetection());
}

TEST_F(DevicePortalDetectionTest, PortalDetectionProxyConfig) {
  EXPECT_CALL(*service_.get(), IsPortalDetectionDisabled())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), HasProxyConfig())
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), IsPortalDetectionAuto())
      .WillOnce(Return(true));
  EXPECT_CALL(manager_, IsPortalDetectionEnabled(device_->technology()))
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  EXPECT_FALSE(StartPortalDetection());
}

TEST_F(DevicePortalDetectionTest, PortalDetectionBadUrl) {
  EXPECT_CALL(*service_.get(), IsPortalDetectionDisabled())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), HasProxyConfig())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), IsPortalDetectionAuto())
      .WillOnce(Return(true));
  EXPECT_CALL(manager_, IsPortalDetectionEnabled(device_->technology()))
      .WillOnce(Return(true));
  const string portal_url;
  EXPECT_CALL(manager_, GetPortalCheckURL())
      .WillRepeatedly(ReturnRef(portal_url));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  EXPECT_FALSE(StartPortalDetection());
}

TEST_F(DevicePortalDetectionTest, PortalDetectionStart) {
  EXPECT_CALL(*service_.get(), IsPortalDetectionDisabled())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), HasProxyConfig())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), IsPortalDetectionAuto())
      .WillOnce(Return(true));
  EXPECT_CALL(manager_, IsPortalDetectionEnabled(device_->technology()))
      .WillOnce(Return(true));
  const string portal_url(PortalDetector::kDefaultURL);
  EXPECT_CALL(manager_, GetPortalCheckURL())
      .WillRepeatedly(ReturnRef(portal_url));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline))
      .Times(0);
  const string kInterfaceName("int0");
  EXPECT_CALL(*connection_.get(), interface_name())
      .WillRepeatedly(ReturnRef(kInterfaceName));
  const vector<string> kDNSServers;
  EXPECT_CALL(*connection_.get(), dns_servers())
      .WillRepeatedly(ReturnRef(kDNSServers));
  EXPECT_TRUE(StartPortalDetection());

  // Drop all references to device_info before it falls out of scope.
  SetConnection(NULL);
  StopPortalDetection();
}

TEST_F(DevicePortalDetectionTest, PortalDetectionNonFinal) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .Times(0);
  EXPECT_CALL(*service_.get(), SetState(_))
      .Times(0);
  PortalDetectorCallback(PortalDetector::Result(
      PortalDetector::kPhaseUnknown,
      PortalDetector::kStatusFailure,
      kPortalAttempts,
      false));
}

TEST_F(DevicePortalDetectionTest, PortalDetectionFailure) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStatePortal));
  EXPECT_CALL(metrics_,
              SendEnumToUMA("Network.Shill.Unknown.PortalResult",
                            Metrics::kPortalResultConnectionFailure,
                            Metrics::kPortalResultMax));
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttemptsToOnline",
                        _, _, _, _)).Times(0);
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttempts",
                        kPortalAttempts,
                        Metrics::kMetricPortalAttemptsMin,
                        Metrics::kMetricPortalAttemptsMax,
                        Metrics::kMetricPortalAttemptsNumBuckets));
  EXPECT_CALL(*connection_.get(), is_default())
      .WillOnce(Return(false));
  PortalDetectorCallback(PortalDetector::Result(
      PortalDetector::kPhaseConnection,
      PortalDetector::kStatusFailure,
      kPortalAttempts,
      true));
}

TEST_F(DevicePortalDetectionTest, PortalDetectionSuccess) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  EXPECT_CALL(metrics_,
              SendEnumToUMA("Network.Shill.Unknown.PortalResult",
                            Metrics::kPortalResultSuccess,
                            Metrics::kPortalResultMax));
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttemptsToOnline",
                        kPortalAttempts,
                        Metrics::kMetricPortalAttemptsToOnlineMin,
                        Metrics::kMetricPortalAttemptsToOnlineMax,
                        Metrics::kMetricPortalAttemptsToOnlineNumBuckets));
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttempts",
                        _, _, _, _)).Times(0);
  PortalDetectorCallback(PortalDetector::Result(
      PortalDetector::kPhaseContent,
      PortalDetector::kStatusSuccess,
      kPortalAttempts,
      true));
}

TEST_F(DevicePortalDetectionTest, PortalDetectionSuccessAfterFailure) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStatePortal));
  EXPECT_CALL(metrics_,
              SendEnumToUMA("Network.Shill.Unknown.PortalResult",
                            Metrics::kPortalResultConnectionFailure,
                            Metrics::kPortalResultMax));
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttemptsToOnline",
                        _, _, _, _)).Times(0);
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttempts",
                        kPortalAttempts,
                        Metrics::kMetricPortalAttemptsMin,
                        Metrics::kMetricPortalAttemptsMax,
                        Metrics::kMetricPortalAttemptsNumBuckets));
  EXPECT_CALL(*connection_.get(), is_default())
      .WillOnce(Return(false));
  PortalDetectorCallback(PortalDetector::Result(
      PortalDetector::kPhaseConnection,
      PortalDetector::kStatusFailure,
      kPortalAttempts,
      true));
  Mock::VerifyAndClearExpectations(&metrics_);

  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  EXPECT_CALL(metrics_,
              SendEnumToUMA("Network.Shill.Unknown.PortalResult",
                            Metrics::kPortalResultSuccess,
                            Metrics::kPortalResultMax));
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttemptsToOnline",
                        kPortalAttempts * 2,
                        Metrics::kMetricPortalAttemptsToOnlineMin,
                        Metrics::kMetricPortalAttemptsToOnlineMax,
                        Metrics::kMetricPortalAttemptsToOnlineNumBuckets));
  EXPECT_CALL(metrics_,
              SendToUMA("Network.Shill.Unknown.PortalAttempts",
                        _, _, _, _)).Times(0);
  PortalDetectorCallback(PortalDetector::Result(
      PortalDetector::kPhaseContent,
      PortalDetector::kStatusSuccess,
      kPortalAttempts,
      true));
}

TEST_F(DevicePortalDetectionTest, RequestPortalDetection) {
  EXPECT_CALL(*service_.get(), state())
      .WillOnce(Return(Service::kStateOnline))
      .WillRepeatedly(Return(Service::kStatePortal));
  EXPECT_FALSE(RequestPortalDetection());

  EXPECT_CALL(*connection_.get(), is_default())
      .WillOnce(Return(false))
      .WillRepeatedly(Return(true));
  EXPECT_FALSE(RequestPortalDetection());

  EXPECT_CALL(*portal_detector_, IsInProgress())
      .WillOnce(Return(true));
  // Portal detection already running.
  EXPECT_TRUE(RequestPortalDetection());

  // Make sure our running mock portal detector was not replaced.
  ExpectPortalDetectorIsMock();

  // Throw away our pre-fabricated portal detector, and have the device create
  // a new one.
  StopPortalDetection();
  EXPECT_CALL(*service_.get(), IsPortalDetectionDisabled())
      .WillRepeatedly(Return(false));
  EXPECT_CALL(*service_.get(), IsPortalDetectionAuto())
      .WillRepeatedly(Return(true));
  EXPECT_CALL(manager_, IsPortalDetectionEnabled(device_->technology()))
      .WillRepeatedly(Return(true));
  EXPECT_CALL(*service_.get(), HasProxyConfig())
      .WillRepeatedly(Return(false));
  const string kPortalCheckURL("http://portal");
  EXPECT_CALL(manager_, GetPortalCheckURL())
      .WillOnce(ReturnRef(kPortalCheckURL));
  const string kInterfaceName("int0");
  EXPECT_CALL(*connection_.get(), interface_name())
      .WillRepeatedly(ReturnRef(kInterfaceName));
  const vector<string> kDNSServers;
  EXPECT_CALL(*connection_.get(), dns_servers())
      .WillRepeatedly(ReturnRef(kDNSServers));
  EXPECT_TRUE(RequestPortalDetection());
}

TEST_F(DevicePortalDetectionTest, NotConnected) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(false));
  SetServiceConnectedState(Service::kStatePortal);
  // We don't check for the portal detector to be reset here, because
  // it would have been reset as a part of disconnection.
}

TEST_F(DevicePortalDetectionTest, NotPortal) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStateOnline));
  SetServiceConnectedState(Service::kStateOnline);
  ExpectPortalDetectorReset();
}

TEST_F(DevicePortalDetectionTest, NotDefault) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(true));
  EXPECT_CALL(*connection_.get(), is_default())
      .WillOnce(Return(false));
  EXPECT_CALL(*service_.get(), SetState(Service::kStatePortal));
  SetServiceConnectedState(Service::kStatePortal);
  ExpectPortalDetectorReset();
}

TEST_F(DevicePortalDetectionTest, PortalIntervalIsZero) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(true));
  EXPECT_CALL(*connection_.get(), is_default())
      .WillOnce(Return(true));
  EXPECT_CALL(manager_, GetPortalCheckInterval())
      .WillOnce(Return(0));
  EXPECT_CALL(*service_.get(), SetState(Service::kStatePortal));
  SetServiceConnectedState(Service::kStatePortal);
  ExpectPortalDetectorReset();
}

TEST_F(DevicePortalDetectionTest, RestartPortalDetection) {
  EXPECT_CALL(*service_.get(), IsConnected())
      .WillOnce(Return(true));
  EXPECT_CALL(*connection_.get(), is_default())
      .WillOnce(Return(true));
  const int kPortalDetectionInterval = 10;
  EXPECT_CALL(manager_, GetPortalCheckInterval())
      .Times(AtLeast(1))
      .WillRepeatedly(Return(kPortalDetectionInterval));
  const string kPortalCheckURL("http://portal");
  EXPECT_CALL(manager_, GetPortalCheckURL())
      .WillOnce(ReturnRef(kPortalCheckURL));
  EXPECT_CALL(*portal_detector_, StartAfterDelay(kPortalCheckURL,
                                                 kPortalDetectionInterval))
      .WillOnce(Return(true));
  EXPECT_CALL(*service_.get(), SetState(Service::kStatePortal));
  SetServiceConnectedState(Service::kStatePortal);
  ExpectPortalDetectorSet();
}

TEST_F(DevicePortalDetectionTest, CancelledOnSelectService) {
  ExpectPortalDetectorSet();
  EXPECT_CALL(*service_.get(), state())
      .WillOnce(Return(Service::kStateIdle));
  EXPECT_CALL(*service_.get(), SetState(_));
  EXPECT_CALL(*service_.get(), SetConnection(_));
  SelectService(NULL);
  ExpectPortalDetectorReset();
}

class DeviceByteCountTest : public DeviceTest {
 public:
  DeviceByteCountTest()
      : manager_(control_interface(),
                 dispatcher(),
                 metrics(),
                 glib()),
        rx_byte_count_(0),
        tx_byte_count_(0),
        rx_stored_byte_count_(0),
        tx_stored_byte_count_(0) {}
  virtual ~DeviceByteCountTest() {}

  virtual void SetUp() {
    DeviceTest::SetUp();
    EXPECT_CALL(manager_, device_info()).WillRepeatedly(Return(&device_info_));
    EXPECT_CALL(device_info_, GetByteCounts(kDeviceInterfaceIndex, _, _))
        .WillRepeatedly(Invoke(this, &DeviceByteCountTest::ReturnByteCounts));
    const string id = device_->GetStorageIdentifier();
    EXPECT_CALL(storage_, ContainsGroup(id)).WillRepeatedly(Return(true));
    EXPECT_CALL(storage_, GetUint64(id, Device::kStorageReceiveByteCount, _))
        .WillRepeatedly(
            Invoke(this, &DeviceByteCountTest::GetStoredReceiveCount));
    EXPECT_CALL(storage_, GetUint64(id, Device::kStorageTransmitByteCount, _))
        .WillRepeatedly(
            Invoke(this, &DeviceByteCountTest::GetStoredTransmitCount));
  }

  bool ReturnByteCounts(int interface_index, uint64 *rx, uint64 *tx) {
    *rx = rx_byte_count_;
    *tx = tx_byte_count_;
    return true;
  }

  bool ExpectByteCounts(DeviceRefPtr device,
                        int64 expected_rx, int64 expected_tx) {
    int64 actual_rx = device->GetReceiveByteCount();
    int64 actual_tx = device->GetTransmitByteCount();
    EXPECT_EQ(expected_rx, actual_rx);
    EXPECT_EQ(expected_tx, actual_tx);
    return expected_rx == actual_rx && expected_tx == actual_tx;
  }

  void ExpectSavedCounts(DeviceRefPtr device,
                         int64 expected_rx, int64 expected_tx) {
    EXPECT_CALL(storage_,
        SetUint64(_, Device::kStorageReceiveByteCount, expected_rx))
        .WillOnce(Return(true));
    EXPECT_CALL(storage_,
        SetUint64(_, Device::kStorageTransmitByteCount, expected_tx))
        .WillOnce(Return(true));
    EXPECT_TRUE(device->Save(&storage_));
  }


  bool GetStoredReceiveCount(const string &group, const string &key,
                             uint64 *value) {
    if (!rx_stored_byte_count_) {
      return false;
    }
    *value = rx_stored_byte_count_;
    return true;
  }

  bool GetStoredTransmitCount(const string &group, const string &key,
                              uint64 *value) {
    if (!tx_stored_byte_count_) {
      return false;
    }
    *value = tx_stored_byte_count_;
    return true;
  }

 protected:
  NiceMock<MockManager> manager_;
  NiceMock<MockStore> storage_;
  uint64 rx_byte_count_;
  uint64 tx_byte_count_;
  uint64 rx_stored_byte_count_;
  uint64 tx_stored_byte_count_;
};


TEST_F(DeviceByteCountTest, GetByteCounts) {
  // On Device initialization, byte counts should be zero, independent of
  // the byte counts reported by the interface.
  rx_byte_count_ = 123;
  tx_byte_count_ = 456;
  DeviceRefPtr device(new TestDevice(control_interface(),
                                     dispatcher(),
                                     NULL,
                                     &manager_,
                                     kDeviceName,
                                     kDeviceAddress,
                                     kDeviceInterfaceIndex,
                                     Technology::kUnknown));
  EXPECT_TRUE(ExpectByteCounts(device, 0, 0));

  // Device should report any increase in the byte counts reported in the
  // interface.
  const int64 delta_rx_count = 789;
  const int64 delta_tx_count = 12;
  rx_byte_count_ += delta_rx_count;
  tx_byte_count_ += delta_tx_count;
  EXPECT_TRUE(ExpectByteCounts(device, delta_rx_count, delta_tx_count));

  // Expect the correct values to be saved to the profile.
  ExpectSavedCounts(device, delta_rx_count, delta_tx_count);

  // If Device is loaded from a profile that does not contain stored byte
  // counts, the byte counts reported should remain unchanged.
  EXPECT_TRUE(device->Load(&storage_));
  EXPECT_TRUE(ExpectByteCounts(device, delta_rx_count, delta_tx_count));

  // If Device is loaded from a profile that contains stored byte
  // counts, the byte counts reported should now reflect the stored values.
  rx_stored_byte_count_ = 345;
  tx_stored_byte_count_ = 678;
  EXPECT_TRUE(device->Load(&storage_));
  EXPECT_TRUE(ExpectByteCounts(
      device, rx_stored_byte_count_, tx_stored_byte_count_));

  // Increases to the interface receive count should be reflected as offsets
  // to the stored byte counts.
  rx_byte_count_ += delta_rx_count;
  tx_byte_count_ += delta_tx_count;
  EXPECT_TRUE(ExpectByteCounts(device,
                               rx_stored_byte_count_ + delta_rx_count,
                               tx_stored_byte_count_ + delta_tx_count));

  // Expect the correct values to be saved to the profile.
  ExpectSavedCounts(device,
                    rx_stored_byte_count_ + delta_rx_count,
                    tx_stored_byte_count_ + delta_tx_count);

  // Expect that after resetting byte counts, read-back values return to zero,
  // and that the device requests this information to be persisted.
  EXPECT_CALL(manager_, UpdateDevice(device));
  device->ResetByteCounters();
  EXPECT_TRUE(ExpectByteCounts(device, 0, 0));
}

class DeviceHealthCheckerTest : public DeviceTest {
 public:
  DeviceHealthCheckerTest()
      : connection_(new StrictMock<MockConnection>(&device_info_)),
        ip_address_store_(new MockIPAddressStore()),
        weak_ptr_factory_(this) {}

 protected:
  void SetUp() {
    DeviceTest::SetUp();

    string default_str;
    vector<string> default_vector;

    ON_CALL(*connection_.get(), interface_name())
        .WillByDefault(ReturnRef(default_str));
    ON_CALL(*connection_.get(), dns_servers())
        .WillByDefault(ReturnRef(default_vector));
    EXPECT_CALL(*connection_.get(), interface_name())
        .Times(AnyNumber());
    EXPECT_CALL(*connection_.get(), dns_servers())
        .Times(AnyNumber());
    EXPECT_CALL(*ip_address_store_.get(), AddUnique(_)).Times(AnyNumber());

    mock_health_checker_.reset(
        new MockConnectionHealthChecker(
            connection_,
            NULL,
            ip_address_store_.get(),
            Bind(&DeviceHealthCheckerTest::OnConnectionHealthCheckerResult,
                 weak_ptr_factory_.GetWeakPtr())));
  }

  void SetMockHealthChecker() {
    device_->set_health_checker(mock_health_checker_.release());
    EXPECT_TRUE(device_->health_checker_.get());
  }

  void SetMockConnection() {
    device_->connection_ = connection_;
  }

  void OnConnectionHealthCheckerResult(
    ConnectionHealthChecker::Result result) {
  }

  scoped_refptr<MockConnection> connection_;
  scoped_ptr<MockConnectionHealthChecker> mock_health_checker_;
  scoped_ptr<MockIPAddressStore> ip_address_store_;
  base::WeakPtrFactory<DeviceHealthCheckerTest> weak_ptr_factory_;
};

TEST_F(DeviceHealthCheckerTest, RequestConnectionHealthCheck) {
  EXPECT_FALSE(device_->health_checker_.get());
  MockConnectionHealthChecker *health_checker = mock_health_checker_.get();
  SetMockHealthChecker();
  EXPECT_CALL(*health_checker, health_check_in_progress())
      .WillOnce(Return(true));
  EXPECT_CALL(*health_checker, Start()).Times(0);
  device_->RequestConnectionHealthCheck();
  Mock::VerifyAndClearExpectations(health_checker);

  EXPECT_CALL(*health_checker, health_check_in_progress())
      .WillOnce(Return(false));
  EXPECT_CALL(*health_checker, Start()).Times(1);
  device_->RequestConnectionHealthCheck();
  Mock::VerifyAndClearExpectations(health_checker);
}

}  // namespace shill