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

device/generic_sensor/platform_sensor_and_provider_unittest_win.cc

Index: device/generic_sensor/platform_sensor_and_provider_unittest_win.cc
diff --git a/device/generic_sensor/platform_sensor_and_provider_unittest_win.cc b/device/generic_sensor/platform_sensor_and_provider_unittest_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fbe917fe68b439ac74b5a8aab3f7751f6668909b
--- /dev/null
+++ b/device/generic_sensor/platform_sensor_and_provider_unittest_win.cc
@@ -0,0 +1,723 @@
+// 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 <SensorsApi.h>
+#include <objbase.h>
+#include <propvarutil.h>
+#include <sensors.h>
+
+#include "base/bind.h"
+#include "base/memory/ptr_util.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/win/iunknown_impl.h"
+#include "base/win/scoped_propvariant.h"
+#include "device/generic_sensor/generic_sensor_consts.h"
+#include "device/generic_sensor/platform_sensor_provider_win.h"
+#include "device/generic_sensor/public/interfaces/sensor_provider.mojom.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;
+using ::testing::WithArgs;
+
+namespace device {
+
+using mojom::SensorType;
+
+template <class Interface>
+class MockCOMInterface : public Interface, public base::win::IUnknownImpl {
+ public:
+  // IUnknown interface
+  ULONG STDMETHODCALLTYPE AddRef() override { return IUnknownImpl::AddRef(); }
+  ULONG STDMETHODCALLTYPE Release() override { return IUnknownImpl::Release(); }
+
+  STDMETHODIMP QueryInterface(REFIID riid, void** ppv) override {
+    if (riid == __uuidof(Interface)) {
+      *ppv = static_cast<Interface*>(this);
+      AddRef();
+      return S_OK;
+    }
+    return IUnknownImpl::QueryInterface(riid, ppv);
+  }
+
+ protected:
+  ~MockCOMInterface() override = default;
+};
+
+// Mock class for ISensorManager COM interface.
+class MockISensorManager : public MockCOMInterface<ISensorManager> {
+ public:
+  // ISensorManager interface
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetSensorsByCategory,
+                             HRESULT(REFSENSOR_CATEGORY_ID category,
+                                     ISensorCollection** sensors_found));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetSensorsByType,
+                             HRESULT(REFSENSOR_TYPE_ID sensor_id,
+                                     ISensorCollection** sensors_found));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetSensorByID,
+                             HRESULT(REFSENSOR_ID sensor_id, ISensor** sensor));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             SetEventSink,
+                             HRESULT(ISensorManagerEvents* event_sink));
+  MOCK_METHOD3_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             RequestPermissions,
+                             HRESULT(HWND parent,
+                                     ISensorCollection* sensors,
+                                     BOOL is_modal));
+
+ protected:
+  ~MockISensorManager() override = default;
+};
+
+// Mock class for ISensorCollection COM interface.
+class MockISensorCollection : public MockCOMInterface<ISensorCollection> {
+ public:
+  // ISensorCollection interface
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetAt,
+                             HRESULT(ULONG index, ISensor** sensor));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetCount,
+                             HRESULT(ULONG* count));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, Add, HRESULT(ISensor* sensor));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             Remove,
+                             HRESULT(ISensor* sensor));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             RemoveByID,
+                             HRESULT(REFSENSOR_ID sensor_id));
+  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, Clear, HRESULT());
+
+ protected:
+  ~MockISensorCollection() override = default;
+};
+
+// Mock class for ISensor COM interface.
+class MockISensor : public MockCOMInterface<ISensor> {
+ public:
+  // ISensor interface
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, GetID, HRESULT(SENSOR_ID* id));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetCategory,
+                             HRESULT(SENSOR_CATEGORY_ID* category));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetType,
+                             HRESULT(SENSOR_TYPE_ID* type));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetFriendlyName,
+                             HRESULT(BSTR* name));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetProperty,
+                             HRESULT(REFPROPERTYKEY key,
+                                     PROPVARIANT* property));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetProperties,
+                             HRESULT(IPortableDeviceKeyCollection* keys,
+                                     IPortableDeviceValues** properties));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetSupportedDataFields,
+                             HRESULT(IPortableDeviceKeyCollection** data));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             SetProperties,
+                             HRESULT(IPortableDeviceValues* properties,
+                                     IPortableDeviceValues** results));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             SupportsDataField,
+                             HRESULT(REFPROPERTYKEY key,
+                                     VARIANT_BOOL* is_supported));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetState,
+                             HRESULT(SensorState* state));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetData,
+                             HRESULT(ISensorDataReport** data_report));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             SupportsEvent,
+                             HRESULT(REFGUID event_guid,
+                                     VARIANT_BOOL* is_supported));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetEventInterest,
+                             HRESULT(GUID** values, ULONG* count));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             SetEventInterest,
+                             HRESULT(GUID* values, ULONG count));
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             SetEventSink,
+                             HRESULT(ISensorEvents* pEvents));
+
+ protected:
+  ~MockISensor() override = default;
+};
+
+// Mock class for ISensorDataReport COM interface.
+class MockISensorDataReport : public MockCOMInterface<ISensorDataReport> {
+ public:
+  // ISensorDataReport interface
+  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetTimestamp,
+                             HRESULT(SYSTEMTIME* timestamp));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetSensorValue,
+                             HRESULT(REFPROPERTYKEY key, PROPVARIANT* value));
+  MOCK_METHOD2_WITH_CALLTYPE(STDMETHODCALLTYPE,
+                             GetSensorValues,
+                             HRESULT(IPortableDeviceKeyCollection* keys,
+                                     IPortableDeviceValues** values));
+
+ protected:
+  ~MockISensorDataReport() override = default;
+};
+
+// Class that provides test harness support for generic sensor adaptation for
+// Windows platform. Testing is mainly done by mocking main COM interfaces that
+// are used to communicate with Sensors API.
+// MockISensorManager    - mocks ISensorManager and responsible for fetching
+//                         list of supported sensors.
+// MockISensorCollection - mocks collection of ISensor objects.
+// MockISensor           - mocks ISensor intrface.
+// MockISensorDataReport - mocks IDataReport interface that is used to deliver
+//                         data in OnDataUpdated event.
+class PlatformSensorAndProviderTestWin : public ::testing::Test {
+ public:
+  void SetUp() override {
+    sensor_ = new NiceMock<MockISensor>();
+    sensor_collection_ = new NiceMock<MockISensorCollection>();
+    sensor_manager_ = new NiceMock<MockISensorManager>();
+    base::win::ScopedComPtr<ISensorManager> manager;
+    sensor_manager_->QueryInterface(IID_PPV_ARGS(&manager));
+
+    // Overrides default ISensorManager with mocked interface.
+    PlatformSensorProviderWin::GetInstance()->SetSensorManagerForTesting(
+        manager);
+  }
+
+  void TearDown() override {
+    base::win::ScopedComPtr<ISensorManager> null_manager;
+    PlatformSensorProviderWin::GetInstance()->SetSensorManagerForTesting(
+        null_manager);
+  }
+
+ protected:
+  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>();
+    PlatformSensorProviderWin::GetInstance()->CreateSensor(
+        type, base::Bind(&PlatformSensorAndProviderTestWin::SensorCreated,
+                         base::Unretained(this)));
+    run_loop_->Run();
+    scoped_refptr<PlatformSensor> sensor;
+    sensor.swap(platform_sensor_);
+    run_loop_ = nullptr;
+    return sensor;
+  }
+
+  // Listening the sensor is asynchronous, therefore inner loop is used to wait
+  // for SetEventSink to be called.
+  bool StartListening(scoped_refptr<PlatformSensor> sensor,
+                      PlatformSensor::Client* client,
+                      const PlatformSensorConfiguration& config) {
+    run_loop_ = base::MakeUnique<base::RunLoop>();
+    bool ret = sensor->StartListening(client, config);
+    run_loop_->Run();
+    run_loop_ = nullptr;
+    return ret;
+  }
+
+  void QuitInnerLoop() { run_loop_->Quit(); }
+
+  // Sets sensor with REFSENSOR_TYPE_ID |sensor| to be supported by mocked
+  // ISensorMager and it will be present in ISensorCollection.
+  void SetSupportedSensor(REFSENSOR_TYPE_ID sensor) {
+    // Returns mock ISensorCollection.
+    EXPECT_CALL(*sensor_manager_, GetSensorsByType(sensor, _))
+        .WillOnce(Invoke(
+            [this](REFSENSOR_TYPE_ID type, ISensorCollection** collection) {
+              sensor_collection_->QueryInterface(
+                  __uuidof(ISensorCollection),
+                  reinterpret_cast<void**>(collection));
+              return S_OK;
+            }));
+
+    // Returns number of ISensor objects in ISensorCollection, at the moment
+    // only one ISensor interface instance is suported.
+    EXPECT_CALL(*sensor_collection_, GetCount(_))
+        .WillOnce(Invoke([](ULONG* count) {
+          *count = 1;
+          return S_OK;
+        }));
+
+    // Returns ISensor interface instance at index 0.
+    EXPECT_CALL(*sensor_collection_, GetAt(0, _))
+        .WillOnce(Invoke([this](ULONG index, ISensor** sensor) {
+          sensor_->QueryInterface(__uuidof(ISensor),
+                                  reinterpret_cast<void**>(sensor));
+          return S_OK;
+        }));
+
+    // Handles |SetEventSink| call that is used to subscribe to sensor events
+    // through ISensorEvents interface. ISensorEvents is stored and attached to
+    // |sensor_events_| that is used later to generate fake error, state and
+    // data change events.
+    ON_CALL(*sensor_, SetEventSink(NotNull()))
+        .WillByDefault(Invoke([this](ISensorEvents* events) {
+          events->AddRef();
+          sensor_events_.Attach(events);
+          if (this->run_loop_) {
+            message_loop_.task_runner()->PostTask(
+                FROM_HERE,
+                base::Bind(&PlatformSensorAndProviderTestWin::QuitInnerLoop,
+                           base::Unretained(this)));
+          }
+          return S_OK;
+        }));
+
+    // When |SetEventSink| is called with nullptr, it means that client is no
+    // longer interested in sensor events and ISensorEvents can be released.
+    ON_CALL(*sensor_, SetEventSink(IsNull()))
+        .WillByDefault(Invoke([this](ISensorEvents* events) {
+          sensor_events_.Reset();
+          if (this->run_loop_) {
+            message_loop_.task_runner()->PostTask(
+                FROM_HERE,
+                base::Bind(&PlatformSensorAndProviderTestWin::QuitInnerLoop,
+                           base::Unretained(this)));
+          }
+          return S_OK;
+        }));
+  }
+
+  // Sets minimal reporting frequency for the mock sensor.
+  void SetSupportedReportingFrequency(double frequency) {
+    ON_CALL(*sensor_, GetProperty(SENSOR_PROPERTY_MIN_REPORT_INTERVAL, _))
+        .WillByDefault(
+            Invoke([frequency](REFPROPERTYKEY key, PROPVARIANT* pProperty) {
+              pProperty->vt = VT_UI4;
+              pProperty->ulVal =
+                  (1 / frequency) * base::Time::kMillisecondsPerSecond;
+              return S_OK;
+            }));
+  }
+
+  // Generates OnLeave event, e.g. when sensor is disconnected.
+  void GenerateLeaveEvent() {
+    if (!sensor_events_)
+      return;
+    sensor_events_->OnLeave(SENSOR_ID());
+  }
+
+  // Generates OnStateChangedLeave event.
+  void GenerateStateChangeEvent(SensorState state) {
+    if (!sensor_events_)
+      return;
+    sensor_events_->OnStateChanged(sensor_.get(), state);
+  }
+
+  struct PropertyKeyCompare {
+    bool operator()(REFPROPERTYKEY a, REFPROPERTYKEY b) const {
+      if (a.fmtid == b.fmtid)
+        return a.pid < b.pid;
+      return false;
+    }
+  };
+
+  using SensorData =
+      std::map<PROPERTYKEY, const PROPVARIANT*, PropertyKeyCompare>;
+
+  // Generates OnDataUpdated event and creates ISensorDataReport with fake
+  // |value| for property with |key|.
+  void GenerateDataUpdatedEvent(const SensorData& values) {
+    if (!sensor_events_)
+      return;
+
+    // MockISensorDataReport implements IUnknown that provides ref counting.
+    // IUnknown::QueryInterface increases refcount if an object implements
+    // requested interface. ScopedComPtr wraps received interface and destructs
+    // it when there are not more references.
+    auto* mock_report = new NiceMock<MockISensorDataReport>();
+    base::win::ScopedComPtr<ISensorDataReport> data_report;
+    mock_report->QueryInterface(IID_PPV_ARGS(&data_report));
+
+    EXPECT_CALL(*mock_report, GetTimestamp(_))
+        .WillOnce(Invoke([](SYSTEMTIME* timestamp) {
+          GetSystemTime(timestamp);
+          return S_OK;
+        }));
+
+    EXPECT_CALL(*mock_report, GetSensorValue(_, _))
+        .WillRepeatedly(WithArgs<0, 1>(
+            Invoke([&values](REFPROPERTYKEY key, PROPVARIANT* variant) {
+              auto it = values.find(key);
+              if (it == values.end())
+                return E_FAIL;
+
+              PropVariantCopy(variant, it->second);
+              return S_OK;
+            })));
+
+    sensor_events_->OnDataUpdated(sensor_.get(), data_report.Get());
+  }
+
+  scoped_refptr<MockISensorManager> sensor_manager_;
+  scoped_refptr<MockISensorCollection> sensor_collection_;
+  scoped_refptr<MockISensor> sensor_;
+  base::win::ScopedComPtr<ISensorEvents> sensor_events_;
+  base::MessageLoop message_loop_;
+  scoped_refptr<PlatformSensor> platform_sensor_;
+  // Inner run loop used to wait for async sensor creation callback.
+  std::unique_ptr<base::RunLoop> run_loop_;
+};
+
+// 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_;
+};
+
+// Tests that PlatformSensorManager returns null sensor when sensor
+// is not implemented.
+TEST_F(PlatformSensorAndProviderTestWin, SensorIsNotImplemented) {
+  EXPECT_CALL(*sensor_manager_, GetSensorsByType(SENSOR_TYPE_PRESSURE, _))
+      .Times(0);
+  EXPECT_FALSE(CreateSensor(SensorType::PRESSURE));
+}
+
+// Tests that PlatformSensorManager returns null sensor when sensor
+// is implemented, but not supported by the hardware.
+TEST_F(PlatformSensorAndProviderTestWin, SensorIsNotSupported) {
+  EXPECT_CALL(*sensor_manager_, GetSensorsByType(SENSOR_TYPE_AMBIENT_LIGHT, _))
+      .WillOnce(Invoke([](REFSENSOR_TYPE_ID, ISensorCollection** result) {
+        *result = nullptr;
+        return E_FAIL;
+      }));
+
+  EXPECT_FALSE(CreateSensor(SensorType::AMBIENT_LIGHT));
+}
+
+// Tests that PlatformSensorManager returns correct sensor when sensor
+// is supported by the hardware.
+TEST_F(PlatformSensorAndProviderTestWin, SensorIsSupported) {
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+  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(PlatformSensorAndProviderTestWin, StartFails) {
+  SetSupportedReportingFrequency(1);
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+
+  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(PlatformSensorAndProviderTestWin, SensorStarted) {
+  SetSupportedReportingFrequency(10);
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+
+  EXPECT_CALL(*sensor_, SetEventSink(NotNull())).Times(1);
+  EXPECT_CALL(*sensor_, SetEventSink(IsNull())).Times(1);
+  EXPECT_CALL(*sensor_, SetProperties(NotNull(), _))
+      .WillRepeatedly(Invoke(
+          [](IPortableDeviceValues* props, IPortableDeviceValues** result) {
+            ULONG value = 0;
+            HRESULT hr = props->GetUnsignedIntegerValue(
+                SENSOR_PROPERTY_CURRENT_REPORT_INTERVAL, &value);
+            EXPECT_TRUE(SUCCEEDED(hr));
+            // 10Hz is 100msec
+            EXPECT_THAT(value, 100);
+            return hr;
+          }));
+
+  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+
+  EXPECT_CALL(*client, OnSensorReadingChanged()).Times(1);
+  base::win::ScopedPropVariant pvLux;
+  InitPropVariantFromDouble(3.14, pvLux.Receive());
+  GenerateDataUpdatedEvent({{SENSOR_DATA_TYPE_LIGHT_LEVEL_LUX, pvLux.ptr()}});
+  base::RunLoop().RunUntilIdle();
+  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
+}
+
+// Tests that OnSensorError is called when sensor is disconnected.
+TEST_F(PlatformSensorAndProviderTestWin, SensorRemoved) {
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorError()).Times(1);
+
+  GenerateLeaveEvent();
+  base::RunLoop().RunUntilIdle();
+}
+
+// Tests that OnSensorError is called when sensor is in an error state.
+TEST_F(PlatformSensorAndProviderTestWin, SensorStateChangedToError) {
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorError()).Times(1);
+
+  GenerateStateChangeEvent(SENSOR_STATE_ERROR);
+  base::RunLoop().RunUntilIdle();
+}
+
+// Tests that OnSensorError is not called when sensor is in a ready state.
+TEST_F(PlatformSensorAndProviderTestWin, SensorStateChangedToReady) {
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorError()).Times(0);
+
+  GenerateStateChangeEvent(SENSOR_STATE_READY);
+  base::RunLoop().RunUntilIdle();
+}
+
+// Tests that GetMaximumSupportedFrequency provides correct value.
+TEST_F(PlatformSensorAndProviderTestWin, GetMaximumSupportedFrequency) {
+  SetSupportedReportingFrequency(20);
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
+  EXPECT_TRUE(sensor);
+  EXPECT_THAT(sensor->GetMaximumSupportedFrequency(), 20);
+}
+
+// Tests that GetMaximumSupportedFrequency returns fallback value.
+TEST_F(PlatformSensorAndProviderTestWin, GetMaximumSupportedFrequencyFallback) {
+  SetSupportedReportingFrequency(0);
+  SetSupportedSensor(SENSOR_TYPE_AMBIENT_LIGHT);
+  auto sensor = CreateSensor(SensorType::AMBIENT_LIGHT);
+  EXPECT_TRUE(sensor);
+  EXPECT_THAT(sensor->GetMaximumSupportedFrequency(), 5);
+}
+
+// Tests that Accelerometer readings are correctly converted.
+TEST_F(PlatformSensorAndProviderTestWin, CheckAccelerometerReadingConversion) {
+  mojo::ScopedSharedBufferHandle handle =
+      PlatformSensorProviderWin::GetInstance()->CloneSharedBufferHandle();
+  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
+      sizeof(SensorReadingSharedBuffer),
+      SensorReadingSharedBuffer::GetOffset(SensorType::ACCELEROMETER));
+
+  SetSupportedSensor(SENSOR_TYPE_ACCELEROMETER_3D);
+  auto sensor = CreateSensor(SensorType::ACCELEROMETER);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorReadingChanged()).Times(1);
+
+  double x_accel = 0.25;
+  double y_accel = -0.25;
+  double z_accel = -0.5;
+
+  base::win::ScopedPropVariant pvX, pvY, pvZ;
+  InitPropVariantFromDouble(x_accel, pvX.Receive());
+  InitPropVariantFromDouble(y_accel, pvY.Receive());
+  InitPropVariantFromDouble(z_accel, pvZ.Receive());
+
+  GenerateDataUpdatedEvent({{SENSOR_DATA_TYPE_ACCELERATION_X_G, pvX.ptr()},
+                            {SENSOR_DATA_TYPE_ACCELERATION_Y_G, pvY.ptr()},
+                            {SENSOR_DATA_TYPE_ACCELERATION_Z_G, pvZ.ptr()}});
+
+  base::RunLoop().RunUntilIdle();
+  SensorReadingSharedBuffer* buffer =
+      static_cast<SensorReadingSharedBuffer*>(mapping.get());
+  EXPECT_THAT(buffer->reading.values[0], -x_accel * kMeanGravity);
+  EXPECT_THAT(buffer->reading.values[1], -y_accel * kMeanGravity);
+  EXPECT_THAT(buffer->reading.values[2], -z_accel * kMeanGravity);
+  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
+}
+
+// Tests that Gyroscope readings are correctly converted.
+TEST_F(PlatformSensorAndProviderTestWin, CheckGyroscopeReadingConversion) {
+  mojo::ScopedSharedBufferHandle handle =
+      PlatformSensorProviderWin::GetInstance()->CloneSharedBufferHandle();
+  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
+      sizeof(SensorReadingSharedBuffer),
+      SensorReadingSharedBuffer::GetOffset(SensorType::GYROSCOPE));
+
+  SetSupportedSensor(SENSOR_TYPE_GYROMETER_3D);
+  auto sensor = CreateSensor(SensorType::GYROSCOPE);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorReadingChanged()).Times(1);
+
+  double x_ang_accel = 0.0;
+  double y_ang_accel = -1.8;
+  double z_ang_accel = -98.7;
+
+  base::win::ScopedPropVariant pvX, pvY, pvZ;
+  InitPropVariantFromDouble(x_ang_accel, pvX.Receive());
+  InitPropVariantFromDouble(y_ang_accel, pvY.Receive());
+  InitPropVariantFromDouble(z_ang_accel, pvZ.Receive());
+
+  GenerateDataUpdatedEvent(
+      {{SENSOR_DATA_TYPE_ANGULAR_VELOCITY_X_DEGREES_PER_SECOND, pvX.ptr()},
+       {SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Y_DEGREES_PER_SECOND, pvY.ptr()},
+       {SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Z_DEGREES_PER_SECOND, pvZ.ptr()}});
+
+  base::RunLoop().RunUntilIdle();
+  SensorReadingSharedBuffer* buffer =
+      static_cast<SensorReadingSharedBuffer*>(mapping.get());
+  EXPECT_THAT(buffer->reading.values[0], -x_ang_accel * kRadiansInDegrees);
+  EXPECT_THAT(buffer->reading.values[1], -y_ang_accel * kRadiansInDegrees);
+  EXPECT_THAT(buffer->reading.values[2], -z_ang_accel * kRadiansInDegrees);
+  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
+}
+
+// Tests that Magnetometer readings are correctly converted.
+TEST_F(PlatformSensorAndProviderTestWin, CheckMagnetometerReadingConversion) {
+  mojo::ScopedSharedBufferHandle handle =
+      PlatformSensorProviderWin::GetInstance()->CloneSharedBufferHandle();
+  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
+      sizeof(SensorReadingSharedBuffer),
+      SensorReadingSharedBuffer::GetOffset(SensorType::MAGNETOMETER));
+
+  SetSupportedSensor(SENSOR_TYPE_COMPASS_3D);
+  auto sensor = CreateSensor(SensorType::MAGNETOMETER);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorReadingChanged()).Times(1);
+
+  double x_magn_field = 112.0;
+  double y_magn_field = -162.0;
+  double z_magn_field = 457.0;
+
+  base::win::ScopedPropVariant pvX, pvY, pvZ;
+  InitPropVariantFromDouble(x_magn_field, pvX.Receive());
+  InitPropVariantFromDouble(y_magn_field, pvY.Receive());
+  InitPropVariantFromDouble(z_magn_field, pvZ.Receive());
+
+  GenerateDataUpdatedEvent(
+      {{SENSOR_DATA_TYPE_MAGNETIC_FIELD_STRENGTH_X_MILLIGAUSS, pvX.ptr()},
+       {SENSOR_DATA_TYPE_MAGNETIC_FIELD_STRENGTH_Y_MILLIGAUSS, pvY.ptr()},
+       {SENSOR_DATA_TYPE_MAGNETIC_FIELD_STRENGTH_Z_MILLIGAUSS, pvZ.ptr()}});
+
+  base::RunLoop().RunUntilIdle();
+  SensorReadingSharedBuffer* buffer =
+      static_cast<SensorReadingSharedBuffer*>(mapping.get());
+  EXPECT_THAT(buffer->reading.values[0],
+              -x_magn_field * kMicroteslaInMilligauss);
+  EXPECT_THAT(buffer->reading.values[1],
+              -y_magn_field * kMicroteslaInMilligauss);
+  EXPECT_THAT(buffer->reading.values[2],
+              -z_magn_field * kMicroteslaInMilligauss);
+  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
+}
+
+// Tests that AbsoluteOrientation sensor readings are correctly converted.
+TEST_F(PlatformSensorAndProviderTestWin,
+       CheckDeviceOrientationReadingConversion) {
+  mojo::ScopedSharedBufferHandle handle =
+      PlatformSensorProviderWin::GetInstance()->CloneSharedBufferHandle();
+  mojo::ScopedSharedBufferMapping mapping = handle->MapAtOffset(
+      sizeof(SensorReadingSharedBuffer),
+      SensorReadingSharedBuffer::GetOffset(SensorType::ABSOLUTE_ORIENTATION));
+
+  SetSupportedSensor(SENSOR_TYPE_AGGREGATED_DEVICE_ORIENTATION);
+  auto sensor = CreateSensor(SensorType::ABSOLUTE_ORIENTATION);
+  EXPECT_TRUE(sensor);
+
+  auto client = base::MakeUnique<NiceMock<MockPlatformSensorClient>>(sensor);
+  PlatformSensorConfiguration configuration(10);
+  EXPECT_TRUE(StartListening(sensor, client.get(), configuration));
+  EXPECT_CALL(*client, OnSensorReadingChanged()).Times(1);
+
+  double x = -0.5;
+  double y = -0.5;
+  double z = 0.5;
+  double w = 0.5;
+  float quat_elements[4] = {x, y, z, w};
+
+  base::win::ScopedPropVariant pvQuat;
+
+  // The SENSOR_DATA_TYPE_QUATERNION property has [VT_VECTOR | VT_UI1] type.
+  // https://msdn.microsoft.com/en-us/library/windows/hardware/dn265187(v=vs.85).aspx
+  // Helper functions e.g., InitVariantFromDoubleArray cannot be used for its
+  // intialization and the only way to initialize it, is to use
+  // InitPropVariantFromGUIDAsBuffer with quaternion format GUID.
+  InitPropVariantFromGUIDAsBuffer(SENSOR_DATA_TYPE_QUATERNION.fmtid,
+                                  pvQuat.Receive());
+  memcpy(pvQuat.get().caub.pElems, &quat_elements, sizeof(quat_elements));
+  GenerateDataUpdatedEvent({{SENSOR_DATA_TYPE_QUATERNION, pvQuat.ptr()}});
+
+  base::RunLoop().RunUntilIdle();
+  SensorReadingSharedBuffer* buffer =
+      static_cast<SensorReadingSharedBuffer*>(mapping.get());
+
+  EXPECT_THAT(buffer->reading.values[0], -x);
+  EXPECT_THAT(buffer->reading.values[1], -y);
+  EXPECT_THAT(buffer->reading.values[2], -z);
+  EXPECT_THAT(buffer->reading.values[3], w);
+  EXPECT_TRUE(sensor->StopListening(client.get(), configuration));
+}
+
+}  // namespace device