Move //device/generic_sensor to be part of the internal implementation of the Device Service.

device/generic_sensor/platform_sensor_and_provider_unittest_linux.cc

Index: device/generic_sensor/platform_sensor_and_provider_unittest_linux.cc
diff --git a/device/generic_sensor/platform_sensor_and_provider_unittest_linux.cc b/device/generic_sensor/platform_sensor_and_provider_unittest_linux.cc
deleted file mode 100644
index 907d12c2ec6764a0914880b38b21253373cf30d5..0000000000000000000000000000000000000000
--- a/device/generic_sensor/platform_sensor_and_provider_unittest_linux.cc
+++ /dev/null
@@ -1,656 +0,0 @@
-// Copyright 2016 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 "base/files/file_util.h"
-#include "base/files/scoped_temp_dir.h"
-#include "base/memory/ptr_util.h"
-#include "base/message_loop/message_loop.h"
-#include "base/run_loop.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_util.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "device/generic_sensor/generic_sensor_consts.h"
-#include "device/generic_sensor/linux/sensor_data_linux.h"
-#include "device/generic_sensor/linux/sensor_device_manager.h"
-#include "device/generic_sensor/platform_sensor_provider_linux.h"
-
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using ::testing::_;
-using ::testing::Invoke;
-using ::testing::IsNull;
-using ::testing::NiceMock;
-using ::testing::NotNull;
-using ::testing::Return;
-
-namespace device {
-
-namespace {
-
-using mojom::SensorType;
-
-// Zero value can mean whether value is not being not used or zero value.
-constexpr double kZero = 0.0;
-
-constexpr double kAccelerometerFrequencyValue = 10.0;
-constexpr double kAccelerometerOffsetValue = 1.0;
-constexpr double kAccelerometerScalingValue = 0.009806;
-
-constexpr double kGyroscopeFrequencyValue = 6.0;
-constexpr double kGyroscopeOffsetValue = 2.0;
-constexpr double kGyroscopeScalingValue = 0.000017;
-
-constexpr double kMagnetometerFrequencyValue = 7.0;
-constexpr double kMagnetometerOffsetValue = 3.0;
-constexpr double kMagnetometerScalingValue = 0.000001;
-
-void DeleteFile(const base::FilePath& file) {
-  EXPECT_TRUE(base::DeleteFile(file, true));
-}
-
-void WriteValueToFile(const base::FilePath& path, double value) {
-  const std::string str = base::DoubleToString(value);
-  int bytes_written = base::WriteFile(path, str.data(), str.size());
-  EXPECT_EQ(static_cast<size_t>(bytes_written), str.size());
-}
-
-std::string ReadValueFromFile(const base::FilePath& path,
-                              const std::string& file) {
-  base::FilePath file_path = base::FilePath(path).Append(file);
-  std::string new_read_value;
-  if (!base::ReadFileToString(file_path, &new_read_value))
-    return std::string();
-  return new_read_value;
-}
-
-}  // namespace
-
-// Mock for SensorDeviceService that SensorDeviceManager owns.
-// This mock is used to emulate udev events and send found sensor devices
-// to SensorDeviceManager.
-class MockSensorDeviceManager : public SensorDeviceManager {
- public:
-  MockSensorDeviceManager() = default;
-  ~MockSensorDeviceManager() override {}
-
-  MOCK_METHOD1(GetUdevDeviceGetSubsystem, std::string(udev_device*));
-  MOCK_METHOD1(GetUdevDeviceGetSyspath, std::string(udev_device*));
-  MOCK_METHOD1(GetUdevDeviceGetDevnode, std::string(udev_device* dev));
-  MOCK_METHOD2(GetUdevDeviceGetSysattrValue,
-               std::string(udev_device*, const std::string&));
-  MOCK_METHOD1(Start, void(Delegate*));
-
-  void InitializeService(Delegate* delegate) { delegate_ = delegate; }
-
-  void EnumerationReady() {
-    bool success = task_runner_->PostTask(
-        FROM_HERE,
-        base::Bind(&SensorDeviceManager::Delegate::OnSensorNodesEnumerated,
-                   base::Unretained(delegate_)));
-    ASSERT_TRUE(success);
-  }
-
-  void DeviceAdded(udev_device* dev) {
-    SensorDeviceManager::OnDeviceAdded(dev);
-  }
-
-  void DeviceRemoved(udev_device* dev) {
-    SensorDeviceManager::OnDeviceRemoved(dev);
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MockSensorDeviceManager);
-};
-
-// Mock for PlatformSensor's client interface that is used to deliver
-// error and data changes notifications.
-class MockPlatformSensorClient : public PlatformSensor::Client {
- public:
-  MockPlatformSensorClient() = default;
-  explicit MockPlatformSensorClient(scoped_refptr<PlatformSensor> sensor)
-      : sensor_(sensor) {
-    if (sensor_)
-      sensor_->AddClient(this);
-
-    ON_CALL(*this, IsNotificationSuspended()).WillByDefault(Return(false));
-  }
-
-  ~MockPlatformSensorClient() override {
-    if (sensor_)
-      sensor_->RemoveClient(this);
-  }
-
-  // PlatformSensor::Client interface.
-  MOCK_METHOD0(OnSensorReadingChanged, void());
-  MOCK_METHOD0(OnSensorError, void());
-  MOCK_METHOD0(IsNotificationSuspended, bool());
-
- private:
-  scoped_refptr<PlatformSensor> sensor_;
-
-  DISALLOW_COPY_AND_ASSIGN(MockPlatformSensorClient);
-};
-
-class PlatformSensorAndProviderLinuxTest : public ::testing::Test {
- public:
-  void SetUp() override {
-    provider_ = PlatformSensorProviderLinux::GetInstance();
-    provider_->SetFileTaskRunnerForTesting(message_loop_.task_runner());
-
-    auto manager = base::MakeUnique<NiceMock<MockSensorDeviceManager>>();
-    manager_ = manager.get();
-    provider_->SetSensorDeviceManagerForTesting(std::move(manager));
-
-    ASSERT_TRUE(sensors_dir_.CreateUniqueTempDir());
-  }
-
-  void TearDown() override {
-    provider_->SetSensorDeviceManagerForTesting(nullptr);
-    ASSERT_TRUE(sensors_dir_.Delete());
-    base::RunLoop().RunUntilIdle();
-  }
-
- protected:
-  void SensorsCreated(scoped_refptr<PlatformSensor> sensor) {
-    platform_sensor_vector_.push_back(sensor);
-  }
-
-  void SensorCreated(scoped_refptr<PlatformSensor> sensor) {
-    platform_sensor_ = sensor;
-    run_loop_->Quit();
-  }
-
-  // Sensor creation is asynchronous, therefore inner loop is used to wait for
-  // PlatformSensorProvider::CreateSensorCallback completion.
-  scoped_refptr<PlatformSensor> CreateSensor(mojom::SensorType type) {
-    run_loop_ = base::MakeUnique<base::RunLoop>();
-    provider_->CreateSensor(
-        type, base::Bind(&PlatformSensorAndProviderLinuxTest::SensorCreated,
-                         base::Unretained(this)));
-    run_loop_->Run();
-    scoped_refptr<PlatformSensor> sensor;
-    sensor.swap(platform_sensor_);
-    run_loop_ = nullptr;
-    return sensor;
-  }
-
-  // Creates sensor files according to SensorPathsLinux.
-  // Existence of sensor read files mean existence of a sensor.
-  // If |frequency| or |scaling| is zero, the corresponding file is not created.
-  void InitializeSupportedSensor(SensorType type,
-                                 double frequency,
-                                 double offset,
-                                 double scaling,
-                                 double values[3]) {
-    SensorPathsLinux data;
-    EXPECT_TRUE(InitSensorData(type, &data));
-
-    base::FilePath sensor_dir = sensors_dir_.GetPath();
-    if (!data.sensor_scale_name.empty() && scaling != 0) {
-      base::FilePath sensor_scale_file =
-          base::FilePath(sensor_dir).Append(data.sensor_scale_name);
-      WriteValueToFile(sensor_scale_file, scaling);
-    }
-
-    if (!data.sensor_offset_file_name.empty()) {
-      base::FilePath sensor_offset_file =
-          base::FilePath(sensor_dir).Append(data.sensor_offset_file_name);
-      WriteValueToFile(sensor_offset_file, offset);
-    }
-
-    if (!data.sensor_frequency_file_name.empty() && frequency != 0) {
-      base::FilePath sensor_frequency_file =
-          base::FilePath(sensor_dir).Append(data.sensor_frequency_file_name);
-      WriteValueToFile(sensor_frequency_file, frequency);
-    }
-
-    uint32_t i = 0;
-    for (const auto& file_names : data.sensor_file_names) {
-      for (const auto& name : file_names) {
-        base::FilePath sensor_file = base::FilePath(sensor_dir).Append(name);
-        WriteValueToFile(sensor_file, values[i++]);
-        break;
-      }
-    }
-  }
-
-  // Initializes mock udev methods that emulate system methods by
-  // just reading values from files, which SensorDeviceService has specified
-  // calling udev methods.
-  void InitializeMockUdevMethods(const base::FilePath& sensor_dir) {
-    ON_CALL(*manager_, GetUdevDeviceGetSubsystem(IsNull()))
-        .WillByDefault(Invoke([](udev_device* dev) { return "iio"; }));
-
-    ON_CALL(*manager_, GetUdevDeviceGetSyspath(IsNull()))
-        .WillByDefault(Invoke(
-            [sensor_dir](udev_device* dev) { return sensor_dir.value(); }));
-
-    ON_CALL(*manager_, GetUdevDeviceGetDevnode(IsNull()))
-        .WillByDefault(Invoke([](udev_device* dev) { return "/dev/test"; }));
-
-    ON_CALL(*manager_, GetUdevDeviceGetSysattrValue(IsNull(), _))
-        .WillByDefault(Invoke(
-            [sensor_dir](udev_device* dev, const std::string& attribute) {
-              return ReadValueFromFile(sensor_dir, attribute);
-            }));
-  }
-
-  // Emulates device enumerations and initial udev events. Once all
-  // devices are added, tells manager its ready.
-  void SetServiceStart() {
-    EXPECT_CALL(*manager_, Start(NotNull()))
-        .WillOnce(Invoke([this](SensorDeviceManager::Delegate* delegate) {
-          manager_->InitializeService(delegate);
-          udev_device* dev = nullptr;
-          manager_->DeviceAdded(dev /* not used */);
-          manager_->EnumerationReady();
-        }));
-  }
-
-  // Waits before OnSensorReadingChanged is called.
-  void WaitOnSensorReadingChangedEvent(MockPlatformSensorClient* client) {
-    run_loop_ = base::MakeUnique<base::RunLoop>();
-    EXPECT_CALL(*client, OnSensorReadingChanged()).WillOnce(Invoke([this]() {
-      run_loop_->Quit();
-    }));
-    run_loop_->Run();
-    run_loop_ = nullptr;
-  }
-
-  // Waits before OnSensorError is called.
-  void WaitOnSensorErrorEvent(MockPlatformSensorClient* client) {
-    run_loop_ = base::MakeUnique<base::RunLoop>();
-    EXPECT_CALL(*client, OnSensorError()).WillOnce(Invoke([this]() {
-      run_loop_->Quit();
-    }));
-    run_loop_->Run();
-    run_loop_ = nullptr;
-  }
-
-  // Generates a "remove device" event by removed sensors' directory and
-  // notifies the mock service about "removed" event.
-  void GenerateDeviceRemovedEvent(const base::FilePath& sensor_dir) {
-    udev_device* dev = nullptr;
-    DeleteFile(sensor_dir);
-    bool success = base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE, base::Bind(&MockSensorDeviceManager::DeviceRemoved,
-                              base::Unretained(manager_), dev /* not used */));
-    ASSERT_TRUE(success);
-  }
-
-  MockSensorDeviceManager* manager_;
-  scoped_refptr<PlatformSensor> platform_sensor_;
-  std::vector<scoped_refptr<PlatformSensor>> platform_sensor_vector_;
-  base::MessageLoop message_loop_;
-  std::unique_ptr<base::RunLoop> run_loop_;
-  PlatformSensorProviderLinux* provider_;
-  // Holds base dir where a sensor dir is located.
-  base::ScopedTempDir sensors_dir_;
-};
-
-// Tests sensor is not returned if not implemented.
-TEST_F(PlatformSensorAndProviderLinuxTest, SensorIsNotImplemented) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  SetServiceStart();
-  EXPECT_FALSE(CreateSensor(SensorType::PROXIMITY));
-}
-
-// Tests sensor is not returned if not supported by hardware.
-TEST_F(PlatformSensorAndProviderLinuxTest, SensorIsNotSupported) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  SetServiceStart();
-  EXPECT_FALSE(CreateSensor(SensorType::ACCELEROMETER));
-}
-
-// Tests sensor is returned if supported.
-TEST_F(PlatformSensorAndProviderLinuxTest, SensorIsSupported) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(sensor);
-  EXPECT_EQ(SensorType::AMBIENT_LIGHT, sensor->GetType());
-}
-
-// Tests that PlatformSensor::StartListening fails when provided reporting
-// frequency is above hardware capabilities.
-TEST_F(PlatformSensorAndProviderLinuxTest, StartFails) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(sensor);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(10);
-  EXPECT_FALSE(sensor->StartListening(client.get(), configuration));
-}
-
-// Tests that PlatformSensor::StartListening succeeds and notification about
-// modified sensor reading is sent to the PlatformSensor::Client interface.
-TEST_F(PlatformSensorAndProviderLinuxTest, SensorStarted) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(sensor);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(5);
-  EXPECT_TRUE(sensor->StartListening(client.get(), configuration));
-  WaitOnSensorReadingChangedEvent(client.get());
-  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
-}
-
-// Tests that OnSensorError is called when sensor is disconnected.
-TEST_F(PlatformSensorAndProviderLinuxTest, SensorRemoved) {
-  double sensor_value[3] = {1};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(sensor);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(5);
-  EXPECT_TRUE(sensor->StartListening(client.get(), configuration));
-  GenerateDeviceRemovedEvent(sensors_dir_.GetPath());
-  WaitOnSensorErrorEvent(client.get());
-}
-
-// Tests that sensor is not returned if not connected and
-// is created after it has been added.
-TEST_F(PlatformSensorAndProviderLinuxTest, SensorAddedAndRemoved) {
-  double sensor_value[3] = {1, 2, 4};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto als_sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(als_sensor);
-  auto gyro_sensor = CreateSensor(SensorType::GYROSCOPE);
-  EXPECT_FALSE(gyro_sensor);
-
-  InitializeSupportedSensor(SensorType::GYROSCOPE, kGyroscopeFrequencyValue,
-                            kGyroscopeOffsetValue, kGyroscopeScalingValue,
-                            sensor_value);
-  udev_device* dev = nullptr;
-  manager_->DeviceAdded(dev /* not used */);
-  base::RunLoop().RunUntilIdle();
-  gyro_sensor = CreateSensor(SensorType::GYROSCOPE);
-  EXPECT_TRUE(gyro_sensor);
-  EXPECT_EQ(gyro_sensor->GetType(), SensorType::GYROSCOPE);
-}
-
-// Checks the main fields of all sensors and initialized right.
-TEST_F(PlatformSensorAndProviderLinuxTest, CheckAllSupportedSensors) {
-  double sensor_value[3] = {1, 2, 3};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeSupportedSensor(
-      SensorType::ACCELEROMETER, kAccelerometerFrequencyValue,
-      kAccelerometerOffsetValue, kAccelerometerScalingValue, sensor_value);
-  InitializeSupportedSensor(SensorType::GYROSCOPE, kGyroscopeFrequencyValue,
-                            kGyroscopeOffsetValue, kGyroscopeScalingValue,
-                            sensor_value);
-  InitializeSupportedSensor(
-      SensorType::MAGNETOMETER, kMagnetometerFrequencyValue,
-      kMagnetometerOffsetValue, kMagnetometerScalingValue, sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto als_sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(als_sensor);
-  EXPECT_EQ(als_sensor->GetType(), SensorType::AMBIENT_LIGHT);
-  EXPECT_THAT(als_sensor->GetDefaultConfiguration().frequency(),
-              kDefaultAmbientLightFrequencyHz);
-
-  auto accel_sensor = CreateSensor(SensorType::ACCELEROMETER);
-  EXPECT_TRUE(accel_sensor);
-  EXPECT_EQ(accel_sensor->GetType(), SensorType::ACCELEROMETER);
-  EXPECT_THAT(accel_sensor->GetDefaultConfiguration().frequency(),
-              kAccelerometerFrequencyValue);
-
-  auto gyro_sensor = CreateSensor(SensorType::GYROSCOPE);
-  EXPECT_TRUE(gyro_sensor);
-  EXPECT_EQ(gyro_sensor->GetType(), SensorType::GYROSCOPE);
-  EXPECT_THAT(gyro_sensor->GetDefaultConfiguration().frequency(),
-              kGyroscopeFrequencyValue);
-
-  auto magn_sensor = CreateSensor(SensorType::MAGNETOMETER);
-  EXPECT_TRUE(magn_sensor);
-  EXPECT_EQ(magn_sensor->GetType(), SensorType::MAGNETOMETER);
-  EXPECT_THAT(magn_sensor->GetDefaultConfiguration().frequency(),
-              kMagnetometerFrequencyValue);
-}
-
-// Tests that GetMaximumSupportedFrequency provides correct value.
-TEST_F(PlatformSensorAndProviderLinuxTest, GetMaximumSupportedFrequency) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(
-      SensorType::ACCELEROMETER, kAccelerometerFrequencyValue,
-      kAccelerometerOffsetValue, kAccelerometerScalingValue, sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::ACCELEROMETER);
-  EXPECT_TRUE(sensor);
-  EXPECT_THAT(sensor->GetMaximumSupportedFrequency(),
-              kAccelerometerFrequencyValue);
-}
-
-// Tests that GetMaximumSupportedFrequency provides correct value when
-// OS does not provide any information about frequency.
-TEST_F(PlatformSensorAndProviderLinuxTest,
-       GetMaximumSupportedFrequencyDefault) {
-  double sensor_value[3] = {5};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(sensor);
-  EXPECT_EQ(SensorType::AMBIENT_LIGHT, sensor->GetType());
-  EXPECT_THAT(sensor->GetMaximumSupportedFrequency(),
-              kDefaultAmbientLightFrequencyHz);
-}
-
-// Tests that Ambient Light sensor is correctly read.
-TEST_F(PlatformSensorAndProviderLinuxTest, CheckAmbientLightReadings) {
-  mojo::ScopedSharedBufferHandle handle = provider_->CloneSharedBufferHandle();
-  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
-      sizeof(SensorReadingSharedBuffer),
-      SensorReadingSharedBuffer::GetOffset(SensorType::AMBIENT_LIGHT));
-
-  double sensor_value[3] = {22};
-  InitializeSupportedSensor(SensorType::AMBIENT_LIGHT, kZero, kZero, kZero,
-                            sensor_value);
-
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
-  EXPECT_TRUE(sensor);
-  EXPECT_EQ(sensor->GetReportingMode(), mojom::ReportingMode::ON_CHANGE);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(
-      sensor->GetMaximumSupportedFrequency());
-  EXPECT_TRUE(sensor->StartListening(client.get(), configuration));
-  WaitOnSensorReadingChangedEvent(client.get());
-  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
-
-  SensorReadingSharedBuffer* buffer =
-      static_cast<SensorReadingSharedBuffer*>(mapping.get());
-  EXPECT_THAT(buffer->reading.values[0], sensor_value[0]);
-}
-
-// Tests that Accelerometer readings are correctly converted.
-TEST_F(PlatformSensorAndProviderLinuxTest,
-       CheckAccelerometerReadingConversion) {
-  mojo::ScopedSharedBufferHandle handle = provider_->CloneSharedBufferHandle();
-  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
-      sizeof(SensorReadingSharedBuffer),
-      SensorReadingSharedBuffer::GetOffset(SensorType::ACCELEROMETER));
-
-  // As long as WaitOnSensorReadingChangedEvent() waits until client gets a
-  // a notification about readings changed, the frequency file must not be
-  // created to make the sensor device manager identify this sensor with
-  // ON_CHANGE reporting mode. This can be done by sending |kZero| as a
-  // frequency value, which means a file is not created.
-  // This will allow the MockPlatformSensorClient to
-  // receive a notification and test if reading values are right. Otherwise
-  // the test will not know when data is ready.
-  double sensor_values[3] = {4.5, -2.45, -3.29};
-  InitializeSupportedSensor(SensorType::ACCELEROMETER, kZero,
-                            kAccelerometerOffsetValue,
-                            kAccelerometerScalingValue, sensor_values);
-
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::ACCELEROMETER);
-  EXPECT_TRUE(sensor);
-  // The reporting mode is ON_CHANGE only for this test.
-  EXPECT_EQ(sensor->GetReportingMode(), mojom::ReportingMode::ON_CHANGE);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(10);
-  EXPECT_TRUE(sensor->StartListening(client.get(), configuration));
-  WaitOnSensorReadingChangedEvent(client.get());
-  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
-
-  SensorReadingSharedBuffer* buffer =
-      static_cast<SensorReadingSharedBuffer*>(mapping.get());
-#if defined(OS_CHROMEOS)
-  double scaling = kMeanGravity / kAccelerometerScalingValue;
-  EXPECT_THAT(buffer->reading.values[0], scaling * sensor_values[0]);
-  EXPECT_THAT(buffer->reading.values[1], scaling * sensor_values[1]);
-  EXPECT_THAT(buffer->reading.values[2], scaling * sensor_values[2]);
-#else
-  double scaling = kAccelerometerScalingValue;
-  EXPECT_THAT(buffer->reading.values[0],
-              -scaling * (sensor_values[0] + kAccelerometerOffsetValue));
-  EXPECT_THAT(buffer->reading.values[1],
-              -scaling * (sensor_values[1] + kAccelerometerOffsetValue));
-  EXPECT_THAT(buffer->reading.values[2],
-              -scaling * (sensor_values[2] + kAccelerometerOffsetValue));
-#endif
-}
-
-// Tests that Gyroscope readings are correctly converted.
-TEST_F(PlatformSensorAndProviderLinuxTest, CheckGyroscopeReadingConversion) {
-  mojo::ScopedSharedBufferHandle handle = provider_->CloneSharedBufferHandle();
-  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
-      sizeof(SensorReadingSharedBuffer),
-      SensorReadingSharedBuffer::GetOffset(SensorType::GYROSCOPE));
-
-  // As long as WaitOnSensorReadingChangedEvent() waits until client gets a
-  // a notification about readings changed, the frequency file must not be
-  // created to make the sensor device manager identify this sensor with
-  // ON_CHANGE reporting mode. This can be done by sending |kZero| as a
-  // frequency value, which means a file is not created.
-  // This will allow the MockPlatformSensorClient to
-  // receive a notification and test if reading values are right. Otherwise
-  // the test will not know when data is ready.
-  double sensor_values[3] = {2.2, -3.8, -108.7};
-  InitializeSupportedSensor(SensorType::GYROSCOPE, kZero, kGyroscopeOffsetValue,
-                            kGyroscopeScalingValue, sensor_values);
-
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::GYROSCOPE);
-  EXPECT_TRUE(sensor);
-  // The reporting mode is ON_CHANGE only for this test.
-  EXPECT_EQ(sensor->GetReportingMode(), mojom::ReportingMode::ON_CHANGE);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(10);
-  EXPECT_TRUE(sensor->StartListening(client.get(), configuration));
-  WaitOnSensorReadingChangedEvent(client.get());
-  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
-
-  SensorReadingSharedBuffer* buffer =
-      static_cast<SensorReadingSharedBuffer*>(mapping.get());
-#if defined(OS_CHROMEOS)
-  double scaling = kMeanGravity * kRadiansInDegrees / kGyroscopeScalingValue;
-  EXPECT_THAT(buffer->reading.values[0], -scaling * sensor_values[0]);
-  EXPECT_THAT(buffer->reading.values[1], -scaling * sensor_values[1]);
-  EXPECT_THAT(buffer->reading.values[2], -scaling * sensor_values[2]);
-#else
-  double scaling = kGyroscopeScalingValue;
-  EXPECT_THAT(buffer->reading.values[0],
-              scaling * (sensor_values[0] + kGyroscopeOffsetValue));
-  EXPECT_THAT(buffer->reading.values[1],
-              scaling * (sensor_values[1] + kGyroscopeOffsetValue));
-  EXPECT_THAT(buffer->reading.values[2],
-              scaling * (sensor_values[2] + kGyroscopeOffsetValue));
-#endif
-}
-
-// Tests that Magnetometer readings are correctly converted.
-TEST_F(PlatformSensorAndProviderLinuxTest, CheckMagnetometerReadingConversion) {
-  mojo::ScopedSharedBufferHandle handle = provider_->CloneSharedBufferHandle();
-  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
-      sizeof(SensorReadingSharedBuffer),
-      SensorReadingSharedBuffer::GetOffset(SensorType::MAGNETOMETER));
-
-  // As long as WaitOnSensorReadingChangedEvent() waits until client gets a
-  // a notification about readings changed, the frequency file must not be
-  // created to make the sensor device manager identify this sensor with
-  // ON_CHANGE reporting mode. This can be done by sending |kZero| as a
-  // frequency value, which means a file is not created.
-  // This will allow the MockPlatformSensorClient to
-  // receive a notification and test if reading values are right. Otherwise
-  // the test will not know when data is ready.
-  double sensor_values[3] = {2.2, -3.8, -108.7};
-  InitializeSupportedSensor(SensorType::MAGNETOMETER, kZero,
-                            kMagnetometerOffsetValue, kMagnetometerScalingValue,
-                            sensor_values);
-
-  InitializeMockUdevMethods(sensors_dir_.GetPath());
-  SetServiceStart();
-
-  auto sensor = CreateSensor(SensorType::MAGNETOMETER);
-  EXPECT_TRUE(sensor);
-  // The reporting mode is ON_CHANGE only for this test.
-  EXPECT_EQ(sensor->GetReportingMode(), mojom::ReportingMode::ON_CHANGE);
-
-  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
-  PlatformSensorConfiguration configuration(10);
-  EXPECT_TRUE(sensor->StartListening(client.get(), configuration));
-  WaitOnSensorReadingChangedEvent(client.get());
-  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
-
-  SensorReadingSharedBuffer* buffer =
-      static_cast<SensorReadingSharedBuffer*>(mapping.get());
-  double scaling = kMagnetometerScalingValue * kMicroteslaInGauss;
-  EXPECT_THAT(buffer->reading.values[0],
-              scaling * (sensor_values[0] + kMagnetometerOffsetValue));
-  EXPECT_THAT(buffer->reading.values[1],
-              scaling * (sensor_values[1] + kMagnetometerOffsetValue));
-  EXPECT_THAT(buffer->reading.values[2],
-              scaling * (sensor_values[2] + kMagnetometerOffsetValue));
-}
-
-}  // namespace device