Add test coverage for CrasAudioHandler.

chromeos/dbus/cras_audio_client.cc

Index: chromeos/dbus/cras_audio_client.cc
diff --git a/chromeos/dbus/cras_audio_client.cc b/chromeos/dbus/cras_audio_client.cc
index 8919e52ffbd67e85bf88a0bf0d4733f1b7a8174e..411314e662d74f36c3e281fff3a2a9d628b23ac7 100644
--- a/chromeos/dbus/cras_audio_client.cc
+++ b/chromeos/dbus/cras_audio_client.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
+#include "chromeos/dbus/cras_audio_client_stub_impl.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
@@ -350,150 +351,6 @@ class CrasAudioClientImpl : public CrasAudioClient {
   DISALLOW_COPY_AND_ASSIGN(CrasAudioClientImpl);
 };
 
-// The CrasAudioClient implementation used on Linux desktop,
-// which does nothing.
-class CrasAudioClientStubImpl : public CrasAudioClient {
- public:
-  CrasAudioClientStubImpl() {
-    VLOG(1) << "CrasAudioClientStubImpl is created";
-
-    // Fake audio output nodes.
-    AudioNode node_1;
-    node_1.is_input = false;
-    node_1.id = 10001;
-    node_1.device_name = "Fake Speaker";
-    node_1.type = "INTERNAL_SPEAKER";
-    node_1.name = "Speaker";
-    node_1.active = false;
-    node_list_.push_back(node_1);
-
-    AudioNode node_2;
-    node_2.is_input = false;
-    node_2.id = 10002;
-    node_2.device_name = "Fake Headphone";
-    node_2.type = "HEADPHONE";
-    node_2.name = "Headphone";
-    node_2.active = true;
-    node_list_.push_back(node_2);
-    active_output_node_id_ = node_2.id;
-
-    AudioNode node_3;
-    node_3.is_input = false;
-    node_3.id = 10003;
-    node_3.device_name = "Fake Audio Output";
-    node_3.type = "BLUETOOTH";
-    node_3.name = "Bluetooth Headphone";
-    node_3.active = false;
-    node_list_.push_back(node_3);
-
-    // Fake audio input ndoes
-    AudioNode node_4;
-    node_4.is_input = true;
-    node_4.id = 10004;
-    node_4.device_name = "Fake Internal Mic";
-    node_4.type = "INTERNAL_MIC";
-    node_4.name = "Internal Mic";
-    node_4.active = false;
-    node_list_.push_back(node_4);
-
-    AudioNode node_5;
-    node_5.is_input = true;
-    node_5.id = 10005;
-    node_5.device_name = "Fake Internal Mic";
-    node_5.type = "USB";
-    node_5.name = "USB Mic";
-    node_5.active = true;
-    node_list_.push_back(node_5);
-    active_input_node_id_ = node_5.id;
-  }
-  virtual ~CrasAudioClientStubImpl() {
-  }
-
-  // CrasAudioClient overrides:
-  // TODO(jennyz): Implement the observers and callbacks in the stub for UI
-  // testing.
-  virtual void AddObserver(Observer* observer) OVERRIDE {
-    observers_.AddObserver(observer);
-  }
-
-  virtual void RemoveObserver(Observer* observer) OVERRIDE {
-    observers_.RemoveObserver(observer);
-  }
-
-  virtual bool HasObserver(Observer* observer) OVERRIDE {
-    return observers_.HasObserver(observer);
-  }
-
-  virtual void GetVolumeState(const GetVolumeStateCallback& callback) OVERRIDE {
-    callback.Run(volume_state_, true);
-  }
-
-  virtual void GetNodes(const GetNodesCallback& callback)OVERRIDE {
-    callback.Run(node_list_, true);
-  }
-
-  virtual void SetOutputNodeVolume(uint64 node_id, int32 volume) OVERRIDE {
-  }
-
-  virtual void SetOutputUserMute(bool mute_on) OVERRIDE {
-    volume_state_.output_user_mute = mute_on;
-    FOR_EACH_OBSERVER(Observer,
-                      observers_,
-                      OutputMuteChanged(volume_state_.output_user_mute));
-  }
-
-  virtual void SetInputNodeGain(uint64 node_id, int32 input_gain) OVERRIDE {
-  }
-
-  virtual void SetInputMute(bool mute_on) OVERRIDE {
-    volume_state_.input_mute = mute_on;
-    FOR_EACH_OBSERVER(Observer,
-                      observers_,
-                      InputMuteChanged(volume_state_.input_mute));
-  }
-
-  virtual void SetActiveOutputNode(uint64 node_id) OVERRIDE {
-    if (active_output_node_id_ == node_id)
-      return;
-
-    for (size_t i = 0; i < node_list_.size(); ++i) {
-      if (node_list_[i].id == active_output_node_id_)
-        node_list_[i].active = false;
-      else if (node_list_[i].id == node_id)
-        node_list_[i].active = true;
-    }
-    active_output_node_id_ = node_id;
-    FOR_EACH_OBSERVER(Observer,
-                      observers_,
-                      ActiveOutputNodeChanged(node_id));
-  }
-
-  virtual void SetActiveInputNode(uint64 node_id) OVERRIDE {
-    if (active_input_node_id_ == node_id)
-      return;
-
-    for (size_t i = 0; i < node_list_.size(); ++i) {
-      if (node_list_[i].id == active_input_node_id_)
-        node_list_[i].active = false;
-      else if (node_list_[i].id == node_id)
-        node_list_[i].active = true;
-    }
-    active_input_node_id_ = node_id;
-    FOR_EACH_OBSERVER(Observer,
-                      observers_,
-                      ActiveInputNodeChanged(node_id));
-  }
-
- private:
-  VolumeState volume_state_;
-  AudioNodeList node_list_;
-  uint64 active_input_node_id_;
-  uint64 active_output_node_id_;
-  ObserverList<Observer> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(CrasAudioClientStubImpl);
-};
-
 CrasAudioClient::Observer::~Observer() {
 }