Add Linux support for the Bluetooth API.

device/bluetooth/bluetooth_audio_sink_bluez_unittest.cc

 // Copyright 2015 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 <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "dbus/object_path.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/bluetooth_audio_sink.h"
-#include "device/bluetooth/bluetooth_audio_sink_chromeos.h"
+#include "device/bluetooth/bluetooth_audio_sink_bluez.h"
 #include "device/bluetooth/dbus/bluetooth_media_client.h"
 #include "device/bluetooth/dbus/bluetooth_media_endpoint_service_provider.h"
 #include "device/bluetooth/dbus/bluetooth_media_transport_client.h"
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 #include "device/bluetooth/dbus/fake_bluetooth_media_client.h"
 #include "device/bluetooth/dbus/fake_bluetooth_media_endpoint_service_provider.h"
 #include "device/bluetooth/dbus/fake_bluetooth_media_transport_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using dbus::ObjectPath;
 using device::BluetoothAdapter;
 using device::BluetoothAdapterFactory;
 using device::BluetoothAudioSink;
 
-namespace chromeos {
+namespace bluez {
 
 class TestAudioSinkObserver : public BluetoothAudioSink::Observer {
  public:
   explicit TestAudioSinkObserver(scoped_refptr<BluetoothAudioSink> audio_sink)
       : state_changed_count_(0),
         volume_changed_count_(0),
         total_read_(0),
         state_(audio_sink->GetState()),
         audio_sink_(audio_sink) {
     audio_sink_->AddObserver(this);
@@ skipping 30 matching lines @@
   int data_available_count_;
   size_t total_read_;
   std::vector<char> data_;
   uint16_t read_mtu_;
   BluetoothAudioSink::State state_;
 
  private:
   scoped_refptr<BluetoothAudioSink> audio_sink_;
 };
 
-class BluetoothAudioSinkChromeOSTest : public testing::Test {
+class BluetoothAudioSinkBlueZTest : public testing::Test {
  public:
   void SetUp() override {
     bluez::BluezDBusManager::Initialize(NULL, true);
 
     callback_count_ = 0;
     error_callback_count_ = 0;
 
     fake_media_ = static_cast<bluez::FakeBluetoothMediaClient*>(
         bluez::BluezDBusManager::Get()->GetBluetoothMediaClient());
     fake_transport_ = static_cast<bluez::FakeBluetoothMediaTransportClient*>(
@@ skipping 25 matching lines @@
 
     // The adapter should outlive audio sink.
     audio_sink_ = nullptr;
     adapter_ = nullptr;
     bluez::BluezDBusManager::Shutdown();
   }
 
   // Gets the existing Bluetooth adapter.
   void GetAdapter() {
     BluetoothAdapterFactory::GetAdapter(
-        base::Bind(&BluetoothAudioSinkChromeOSTest::GetAdapterCallback,
+        base::Bind(&BluetoothAudioSinkBlueZTest::GetAdapterCallback,
                    base::Unretained(this)));
   }
 
   // Called whenever BluetoothAdapter is retrieved successfully.
   void GetAdapterCallback(scoped_refptr<BluetoothAdapter> adapter) {
     adapter_ = adapter;
 
     ASSERT_NE(adapter_.get(), nullptr);
     ASSERT_TRUE(adapter_->IsInitialized());
-    adapter_->SetPowered(
-        true,
-        base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
-                   base::Unretained(this)),
-        base::Bind(&BluetoothAudioSinkChromeOSTest::ErrorCallback,
-                   base::Unretained(this)));
+    adapter_->SetPowered(true,
+                         base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
+                                    base::Unretained(this)),
+                         base::Bind(&BluetoothAudioSinkBlueZTest::ErrorCallback,
+                                    base::Unretained(this)));
     ASSERT_TRUE(adapter_->IsPresent());
     ASSERT_TRUE(adapter_->IsPowered());
     EXPECT_EQ(callback_count_, 1);
     EXPECT_EQ(error_callback_count_, 0);
 
     // Resets callback_count_.
     --callback_count_;
   }
 
-  // Registers BluetoothAudioSinkChromeOS with default codec and capabilities.
+  // Registers BluetoothAudioSinkBlueZ with default codec and capabilities.
   // If the audio sink is retrieved successfully, the state changes to
   // STATE_DISCONNECTED.
   void GetAudioSink() {
     // Sets up valid codec and capabilities.
     BluetoothAudioSink::Options options;
     ASSERT_EQ(options.codec, 0x00);
     ASSERT_EQ(options.capabilities,
               std::vector<uint8_t>({0x3f, 0xff, 0x12, 0x35}));
 
     // Registers |audio_sink_| with valid codec and capabilities
     adapter_->RegisterAudioSink(
-        options,
-        base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterCallback,
-                   base::Unretained(this)),
-        base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterErrorCallback,
+        options, base::Bind(&BluetoothAudioSinkBlueZTest::RegisterCallback,
+                            base::Unretained(this)),
+        base::Bind(&BluetoothAudioSinkBlueZTest::RegisterErrorCallback,
                    base::Unretained(this)));
 
     observer_.reset(new TestAudioSinkObserver(audio_sink_));
     EXPECT_EQ(callback_count_, 1);
     EXPECT_EQ(error_callback_count_, 0);
     EXPECT_EQ(observer_->state_changed_count_, 0);
     EXPECT_EQ(observer_->volume_changed_count_, 0);
   }
 
   void GetFakeMediaEndpoint() {
-    BluetoothAudioSinkChromeOS* audio_sink_chromeos =
-        static_cast<BluetoothAudioSinkChromeOS*>(audio_sink_.get());
-    ASSERT_NE(audio_sink_chromeos, nullptr);
+    BluetoothAudioSinkBlueZ* audio_sink_bluez =
+        static_cast<BluetoothAudioSinkBlueZ*>(audio_sink_.get());
+    ASSERT_NE(audio_sink_bluez, nullptr);
 
     media_endpoint_ =
         static_cast<bluez::FakeBluetoothMediaEndpointServiceProvider*>(
-            audio_sink_chromeos->GetEndpointServiceProvider());
+            audio_sink_bluez->GetEndpointServiceProvider());
   }
 
   // Called whenever RegisterAudioSink is completed successfully.
-  void RegisterCallback(
-      scoped_refptr<BluetoothAudioSink> audio_sink) {
+  void RegisterCallback(scoped_refptr<BluetoothAudioSink> audio_sink) {
     ++callback_count_;
     audio_sink_ = audio_sink;
 
     GetFakeMediaEndpoint();
     ASSERT_NE(media_endpoint_, nullptr);
     fake_media_->SetEndpointRegistered(media_endpoint_, true);
 
     ASSERT_NE(audio_sink_.get(), nullptr);
     ASSERT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   }
@@ skipping 12 matching lines @@
     // audio sink in GetAudioSink().
     EXPECT_EQ(capabilities, std::vector<uint8_t>({0x3f, 0xff, 0x12, 0x35}));
   }
 
   void UnregisterErrorCallback(BluetoothAudioSink::ErrorCode error_code) {
     ++error_callback_count_;
     EXPECT_EQ(error_code, BluetoothAudioSink::ERROR_NOT_UNREGISTERED);
   }
 
   // Generic callbacks.
-  void Callback() {
-    ++callback_count_;
-  }
+  void Callback() { ++callback_count_; }
 
-  void ErrorCallback() {
-    ++error_callback_count_;
-  }
+  void ErrorCallback() { ++error_callback_count_; }
 
  protected:
   int callback_count_;
   int error_callback_count_;
 
   base::MessageLoopForIO message_loop_;
 
   bluez::FakeBluetoothMediaClient* fake_media_;
   bluez::FakeBluetoothMediaTransportClient* fake_transport_;
   bluez::FakeBluetoothMediaEndpointServiceProvider* media_endpoint_;
   scoped_ptr<TestAudioSinkObserver> observer_;
   scoped_refptr<BluetoothAdapter> adapter_;
   scoped_refptr<BluetoothAudioSink> audio_sink_;
 
   // The default property set used while calling SetConfiguration on a media
   // endpoint object.
   bluez::BluetoothMediaEndpointServiceProvider::Delegate::TransportProperties
       properties_;
 };
 
-TEST_F(BluetoothAudioSinkChromeOSTest, RegisterSucceeded) {
+TEST_F(BluetoothAudioSinkBlueZTest, RegisterSucceeded) {
   GetAudioSink();
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, RegisterFailedWithInvalidOptions) {
+TEST_F(BluetoothAudioSinkBlueZTest, RegisterFailedWithInvalidOptions) {
   // Sets options with an invalid codec and valid capabilities.
   BluetoothAudioSink::Options options;
   options.codec = 0xff;
   options.capabilities = std::vector<uint8_t>({0x3f, 0xff, 0x12, 0x35});
 
   adapter_->RegisterAudioSink(
-      options,
-      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterCallback,
-                 base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterErrorCallback,
+      options, base::Bind(&BluetoothAudioSinkBlueZTest::RegisterCallback,
+                          base::Unretained(this)),
+      base::Bind(&BluetoothAudioSinkBlueZTest::RegisterErrorCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(callback_count_, 0);
   EXPECT_EQ(error_callback_count_, 1);
 
   // Sets options with a valid codec and invalid capabilities.
   options.codec = 0x00;
   options.capabilities.clear();
   adapter_->RegisterAudioSink(
-      options,
-      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterCallback,
-                 base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterErrorCallback,
+      options, base::Bind(&BluetoothAudioSinkBlueZTest::RegisterCallback,
+                          base::Unretained(this)),
+      base::Bind(&BluetoothAudioSinkBlueZTest::RegisterErrorCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(callback_count_, 0);
   EXPECT_EQ(error_callback_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, SelectConfiguration) {
+TEST_F(BluetoothAudioSinkBlueZTest, SelectConfiguration) {
   GetAudioSink();
 
   // Simulates calling SelectConfiguration on the media endpoint object owned by
   // |audio_sink_| with some fake capabilities.
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, SetConfiguration) {
+TEST_F(BluetoothAudioSinkBlueZTest, SetConfiguration) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   // Simulates calling SetConfiguration on the media endpoint object owned by
   // |audio_sink_| with a fake transport path and a
   // Delegate::TransportProperties structure.
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, SetConfigurationWithUnexpectedState) {
+TEST_F(BluetoothAudioSinkBlueZTest, SetConfigurationWithUnexpectedState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   // Set state of Delegate::TransportProperties with an unexpected value.
   properties_.state = "pending";
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 }
 
 // Checks if the observer is notified on media-removed event when the state of
 // |audio_sink_| is STATE_DISCONNECTED. Once the media object is removed, the
 // audio sink is no longer valid.
-TEST_F(BluetoothAudioSinkChromeOSTest, MediaRemovedDuringDisconnectedState) {
+TEST_F(BluetoothAudioSinkBlueZTest, MediaRemovedDuringDisconnectedState) {
   GetAudioSink();
 
   // Gets the media object and makes it invisible to see if the state of the
   // audio sink changes accordingly.
   fake_media_->SetVisible(false);
 
   GetFakeMediaEndpoint();
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_INVALID);
   EXPECT_EQ(media_endpoint_, nullptr);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 }
 
 // Checks if the observer is  notified on media-removed event when the state of
 // |audio_sink_| is STATE_IDLE. Once the media object is removed, the audio sink
 // is no longer valid.
-TEST_F(BluetoothAudioSinkChromeOSTest, MediaRemovedDuringIdleState) {
+TEST_F(BluetoothAudioSinkBlueZTest, MediaRemovedDuringIdleState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 14 matching lines @@
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_INVALID);
   EXPECT_EQ(media_endpoint_, nullptr);
 
   // The state becomes disconnted and then invalid, since the removal of
   // transport object should happend before media becomes invisible.
   // State: STATE_IDLE -> STATE_DISCONNECTED -> STATE_INVALID
   EXPECT_EQ(observer_->state_changed_count_, 3);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, MediaRemovedDuringActiveState) {
+TEST_F(BluetoothAudioSinkBlueZTest, MediaRemovedDuringActiveState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 27 matching lines @@
   // The state becomes disconnted and then invalid, since the removal of
   // transport object should happend before media becomes invisible.
   // State: STATE_ACTIVE -> STATE_DISCONNECTED -> STATE_INVALID
   EXPECT_EQ(observer_->state_changed_count_, 5);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
 // Checks if the observer is notified on transport-removed event when the state
 // of |audio_sink_| is STATE_IDEL. Once the media transport object is removed,
 // the audio sink is disconnected.
-TEST_F(BluetoothAudioSinkChromeOSTest, TransportRemovedDuringIdleState) {
+TEST_F(BluetoothAudioSinkBlueZTest, TransportRemovedDuringIdleState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 
   // Makes the transport object invalid to see if the state of the audio sink
   // changes accordingly.
   fake_transport_->SetValid(media_endpoint_, false);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_NE(media_endpoint_, nullptr);
   EXPECT_EQ(observer_->state_changed_count_, 2);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, TransportRemovedDuringActiveState) {
+TEST_F(BluetoothAudioSinkBlueZTest, TransportRemovedDuringActiveState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 18 matching lines @@
   // Makes the transport object invalid to see if the state of the audio sink
   // changes accordingly.
   fake_transport_->SetValid(media_endpoint_, false);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_NE(media_endpoint_, nullptr);
   EXPECT_EQ(observer_->state_changed_count_, 4);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest,
+TEST_F(BluetoothAudioSinkBlueZTest,
        AdapterPoweredChangedDuringDisconnectedState) {
   GetAudioSink();
 
-  adapter_->SetPowered(
-      false,
-      base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
-                 base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::ErrorCallback,
-                 base::Unretained(this)));
+  adapter_->SetPowered(false, base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
+                                         base::Unretained(this)),
+                       base::Bind(&BluetoothAudioSinkBlueZTest::ErrorCallback,
+                                  base::Unretained(this)));
 
   EXPECT_TRUE(adapter_->IsPresent());
   EXPECT_FALSE(adapter_->IsPowered());
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
-  adapter_->SetPowered(
-      true,
-      base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
-                 base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::ErrorCallback,
-                 base::Unretained(this)));
+  adapter_->SetPowered(true, base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
+                                        base::Unretained(this)),
+                       base::Bind(&BluetoothAudioSinkBlueZTest::ErrorCallback,
+                                  base::Unretained(this)));
 
   EXPECT_TRUE(adapter_->IsPresent());
   EXPECT_TRUE(adapter_->IsPowered());
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 3);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, AdapterPoweredChangedDuringIdleState) {
+TEST_F(BluetoothAudioSinkBlueZTest, AdapterPoweredChangedDuringIdleState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 
-  adapter_->SetPowered(
-      false,
-      base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
-                 base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::ErrorCallback,
-                 base::Unretained(this)));
+  adapter_->SetPowered(false, base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
+                                         base::Unretained(this)),
+                       base::Bind(&BluetoothAudioSinkBlueZTest::ErrorCallback,
+                                  base::Unretained(this)));
   GetFakeMediaEndpoint();
 
   EXPECT_TRUE(adapter_->IsPresent());
   EXPECT_FALSE(adapter_->IsPowered());
   EXPECT_NE(media_endpoint_, nullptr);
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 3);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 2);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest,
+TEST_F(BluetoothAudioSinkBlueZTest,
        UnregisterAudioSinkDuringDisconnectedState) {
   GetAudioSink();
 
   audio_sink_->Unregister(
-      base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
                  base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::UnregisterErrorCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::UnregisterErrorCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_INVALID);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, UnregisterAudioSinkDuringIdleState) {
+TEST_F(BluetoothAudioSinkBlueZTest, UnregisterAudioSinkDuringIdleState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 
   audio_sink_->Unregister(
-      base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
                  base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::UnregisterErrorCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::UnregisterErrorCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_INVALID);
   EXPECT_EQ(callback_count_, 3);
   EXPECT_EQ(error_callback_count_, 0);
 
   // The state becomes disconnted and then invalid, since the removal of
   // transport object should happend before the unregistration of endpoint.
   // State: STATE_IDLE -> STATE_DISCONNECTED -> STATE_INVALID
   EXPECT_EQ(observer_->state_changed_count_, 3);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, UnregisterAudioSinkDuringActiveState) {
+TEST_F(BluetoothAudioSinkBlueZTest, UnregisterAudioSinkDuringActiveState) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 
   fake_transport_->SetState(media_endpoint_->object_path(), "pending");
 
   message_loop_.RunUntilIdle();
 
   // Acquire is called when the state of |audio_sink_| becomes STATE_PENDING,
   // and Acquire will trigger state change. Therefore, the state will be
   // STATE_ACTIVE right after STATE_PENDING.
   // State: STATE_IDLE -> STATE_PENDING -> STATE_ACTIVE
   EXPECT_EQ(observer_->state_changed_count_, 3);
 
   audio_sink_->Unregister(
-      base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::Callback,
                  base::Unretained(this)),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::UnregisterErrorCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::UnregisterErrorCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_INVALID);
   EXPECT_EQ(callback_count_, 3);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 5);
   EXPECT_EQ(observer_->volume_changed_count_, 2);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, StateChanged) {
+TEST_F(BluetoothAudioSinkBlueZTest, StateChanged) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
       properties_);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 
   // Changes the current state of transport to pending.
   fake_transport_->SetState(media_endpoint_->object_path(), "pending");
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_PENDING);
   EXPECT_EQ(observer_->state_changed_count_, 3);
   EXPECT_EQ(observer_->volume_changed_count_, 1);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, VolumeChanged) {
+TEST_F(BluetoothAudioSinkBlueZTest, VolumeChanged) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 20 matching lines @@
 
   // Changes volume to an invalid level.
   fake_transport_->SetVolume(media_endpoint_->object_path(), 200);
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_IDLE);
   EXPECT_EQ(observer_->state_changed_count_, 1);
   EXPECT_EQ(observer_->volume_changed_count_, 3);
   EXPECT_EQ(audio_sink_->GetVolume(), BluetoothAudioSink::kInvalidVolume);
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, AcquireFD) {
+TEST_F(BluetoothAudioSinkBlueZTest, AcquireFD) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 17 matching lines @@
   // STATE_ACTIVE right after STATE_PENDING.
   // State: STATE_IDLE -> STATE_PENDING -> STATE_ACTIVE
   EXPECT_EQ(observer_->state_changed_count_, 3);
   EXPECT_EQ(observer_->total_read_, data_one.size());
   EXPECT_EQ(observer_->data_, data_one);
   EXPECT_EQ(observer_->read_mtu_,
             bluez::FakeBluetoothMediaTransportClient::kDefaultReadMtu);
 }
 
 // Tests the case where the remote device pauses and resume audio streaming.
-TEST_F(BluetoothAudioSinkChromeOSTest, PauseAndResume) {
+TEST_F(BluetoothAudioSinkBlueZTest, PauseAndResume) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 32 matching lines @@
 
   message_loop_.RunUntilIdle();
 
   EXPECT_EQ(observer_->data_, data_two);
   EXPECT_EQ(observer_->read_mtu_,
             bluez::FakeBluetoothMediaTransportClient::kDefaultReadMtu);
   EXPECT_EQ(observer_->state_changed_count_, 6);
   EXPECT_EQ(observer_->total_read_, data_two.size());
 }
 
-TEST_F(BluetoothAudioSinkChromeOSTest, ContinuouslyStreaming) {
+TEST_F(BluetoothAudioSinkBlueZTest, ContinuouslyStreaming) {
   GetAudioSink();
 
   media_endpoint_->SelectConfiguration(
       std::vector<uint8_t>({0x21, 0x15, 0x33, 0x2C}),
-      base::Bind(&BluetoothAudioSinkChromeOSTest::SelectConfigurationCallback,
+      base::Bind(&BluetoothAudioSinkBlueZTest::SelectConfigurationCallback,
                  base::Unretained(this)));
 
   EXPECT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
   EXPECT_EQ(callback_count_, 2);
   EXPECT_EQ(error_callback_count_, 0);
   EXPECT_EQ(observer_->state_changed_count_, 0);
   EXPECT_EQ(observer_->volume_changed_count_, 0);
 
   media_endpoint_->SetConfiguration(
       fake_transport_->GetTransportPath(media_endpoint_->object_path()),
@@ skipping 23 matching lines @@
 
   message_loop_.RunUntilIdle();
 
   EXPECT_EQ(observer_->data_, data_two);
   EXPECT_EQ(observer_->read_mtu_,
             bluez::FakeBluetoothMediaTransportClient::kDefaultReadMtu);
   EXPECT_EQ(observer_->state_changed_count_, 3);
   EXPECT_EQ(observer_->total_read_, data_one.size() + data_two.size());
 }
 
-}  // namespace chromeos
+}  // namespace bluez