device/bluetooth:Implement Register() for BluetoothAudioSinkChromeOS.

device/bluetooth/bluetooth_audio_sink_chromeos_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 "chromeos/dbus/dbus_thread_manager.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 "testing/gtest/include/gtest/gtest.h"
+
+using device::BluetoothAdapter;
+using device::BluetoothAdapterFactory;
+using device::BluetoothAudioSink;
+
+namespace chromeos {
+
+class TestAudioSinkObserver : public BluetoothAudioSink::Observer {
+ public:
+  explicit TestAudioSinkObserver(scoped_refptr<BluetoothAudioSink> audio_sink)
+      : state_changed_count_(0),
+        volume_changed_count_(0),
+        state_(audio_sink->GetState()),
+        audio_sink_(audio_sink) {
+    audio_sink_->AddObserver(this);
+  }
+
+  ~TestAudioSinkObserver() override { audio_sink_->RemoveObserver(this); }
+
+  void BluetoothAudioSinkStateChanged(
+      BluetoothAudioSink* audio_sink,
+      BluetoothAudioSink::State state) override {
+    ++state_changed_count_;
+  }
+
+  void BluetoothAudioSinkVolumeChanged(BluetoothAudioSink* audio_sink,
+                                       uint16_t volume) override {
+    ++volume_changed_count_;
+  }
+
+  int state_changed_count_;
+  int volume_changed_count_;
+  BluetoothAudioSink::State state_;
+
+ private:
+  scoped_refptr<BluetoothAudioSink> audio_sink_;
+};
+
+class BluetoothAudioSinkChromeOSTest : public testing::Test {
+ public:
+  void SetUp() override {
+    chromeos::DBusThreadManager::Initialize();
+    callback_count_ = 0;
+    error_callback_count_ = 0;
+  }
+
+  void TearDown() override {
+    callback_count_ = 0;
+    error_callback_count_ = 0;
+
+    // The adapter should outlive audio sink.
+    audio_sink_ = nullptr;
+    adapter_ = nullptr;
+    DBusThreadManager::Shutdown();
+  }
+
+  void GetAdapter() {
+    BluetoothAdapterFactory::GetAdapter(
+        base::Bind(&BluetoothAudioSinkChromeOSTest::AdapterCallback,

[Ben Chan, 2015/01/28 15:54:28]

GetAdapterCallback

[Miao, 2015/01/28 22:34:21]

Done.

+                   base::Unretained(this)));
+  }
+
+  void AdapterCallback(scoped_refptr<BluetoothAdapter> adapter) {
+    adapter_ = adapter;
+
+    ASSERT_TRUE(adapter_.get() != nullptr);

[Ben Chan, 2015/01/28 15:54:28]

ASSERT_NE

[Miao, 2015/01/28 22:34:21]

Done.

+    ASSERT_TRUE(adapter_->IsInitialized());
+    adapter_->SetPowered(
+        true,
+        base::Bind(&BluetoothAudioSinkChromeOSTest::Callback,
+                   base::Unretained(this)),
+        base::Bind(&BluetoothAudioSinkChromeOSTest::ErrorCallback,
+                   base::Unretained(this)));
+    ASSERT_TRUE(adapter_->IsPresent());
+    ASSERT_TRUE(adapter_->IsPowered());
+    ASSERT_EQ(callback_count_, 1);
+    ASSERT_EQ(error_callback_count_, 0);
+    --callback_count_;
+  }
+
+  void RegisterCallback(
+      scoped_refptr<BluetoothAudioSink> audio_sink) {
+    ++callback_count_;
+    audio_sink_ = audio_sink;
+    ASSERT_TRUE(audio_sink_.get() != nullptr);

[Ben Chan, 2015/01/28 15:54:28]

ditto

[Miao, 2015/01/28 22:34:21]

Done.

+    ASSERT_EQ(audio_sink_->GetState(), BluetoothAudioSink::STATE_DISCONNECTED);
+  }
+
+  void RegisterErrorCallback(BluetoothAudioSink::ErrorCode error_code) {
+    ++error_callback_count_;
+    ASSERT_EQ(error_code, BluetoothAudioSink::ERROR_NOT_REGISTERED);
+  }
+
+  // Generic callbacks.
+  void Callback() {
+    ++callback_count_;
+  }
+
+  void ErrorCallback() {
+    ++error_callback_count_;
+  }
+
+ protected:
+  int callback_count_;

[Ben Chan, 2015/01/28 15:54:28]

add a constructor to initialize these variables?

[Miao, 2015/01/28 22:34:21]

These variables can be initialized in SetUp() as well. I need SetUp() anyway,
since DBusThreadManager::Initialize() may throw an exception.

+  int error_callback_count_;
+  base::MessageLoop message_loop_;
+  scoped_refptr<BluetoothAdapter> adapter_;
+  scoped_refptr<BluetoothAudioSink> audio_sink_;
+};
+
+TEST_F(BluetoothAudioSinkChromeOSTest, RegisterSucceeded) {
+  GetAdapter();
+
+  BluetoothAudioSink::Options options;
+  ASSERT_EQ(options.codec, 0x00);
+  ASSERT_EQ(options.capabilities,
+            std::vector<uint8_t>({0x3f, 0xff, 0x12, 0x35}));
+  adapter_->RegisterAudioSink(
+      options,
+      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterCallback,
+                 base::Unretained(this)),
+      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterErrorCallback,
+                 base::Unretained(this)));
+
+  TestAudioSinkObserver observer(audio_sink_);
+
+  ASSERT_EQ(callback_count_, 1);
+  ASSERT_EQ(error_callback_count_, 0);
+  ASSERT_EQ(observer.state_changed_count_, 0);
+  ASSERT_EQ(observer.volume_changed_count_, 0);
+}
+
+TEST_F(BluetoothAudioSinkChromeOSTest, RegisterFailedWithInvalidOptions) {
+  GetAdapter();
+
+  // Initiates invalid options.
+  BluetoothAudioSink::Options options;
+  options.codec = 0x11;
+  options.capabilities = std::vector<uint8_t>({0x3f, 0xff, 0x12, 0x35});
+
+  adapter_->RegisterAudioSink(
+      options,
+      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterCallback,
+                 base::Unretained(this)),
+      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterErrorCallback,
+                 base::Unretained(this)));
+
+  ASSERT_EQ(callback_count_, 0);
+  ASSERT_EQ(error_callback_count_, 1);
+
+  options.codec = 0x00;
+  options.capabilities = std::vector<uint8_t>({});

[Ben Chan, 2015/01/28 15:54:28]

{} isn't necessary.  or just call options.capabilities.clear()

[Miao, 2015/01/28 22:34:21]

Done.

+  adapter_->RegisterAudioSink(
+      options,
+      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterCallback,
+                 base::Unretained(this)),
+      base::Bind(&BluetoothAudioSinkChromeOSTest::RegisterErrorCallback,
+                 base::Unretained(this)));
+
+  ASSERT_EQ(callback_count_, 0);
+  ASSERT_EQ(error_callback_count_, 2);
+}
+
+}  // namespace chromeos