Open backdoor in VoiceEngineImpl to get at the actual voe::Channel objects from an ID.

webrtc/test/mock_voice_engine.h

Index: webrtc/test/mock_voice_engine.h
diff --git a/webrtc/test/mock_voice_engine.h b/webrtc/test/mock_voice_engine.h
index dead2260a37625e8a55eeebd468e0d0dc8c20844..45e65be86d4ed72d4bc43a28688f9384e8166b06 100644
--- a/webrtc/test/mock_voice_engine.h
+++ b/webrtc/test/mock_voice_engine.h
@@ -12,6 +12,7 @@
 #define WEBRTC_AUDIO_MOCK_VOICE_ENGINE_H_
 
 #include "testing/gmock/include/gmock/gmock.h"
+#include "webrtc/test/mock_voe_channel_proxy.h"
 #include "webrtc/voice_engine/voice_engine_impl.h"
 
 namespace webrtc {
@@ -25,6 +26,11 @@ class MockVoiceEngine : public VoiceEngineImpl {
     // Increase ref count so this object isn't automatically deleted whenever
     // interfaces are Release():d.
     ++_ref_count;
+    // We add this default behavior to make the mock easier to use in tests. It
+    // will return a NiceMock of a voe::ChannelProxy.
+    ON_CALL(*this, GetChannelProxy(testing::_))
+        .WillByDefault(
+            testing::Invoke(this, &MockVoiceEngine::CreateChannelProxy));

[kwiberg-webrtc, 2015/11/25 10:44:59]

Lambda here too?

[the sun, 2015/11/25 12:28:01]

Done.

   }
   ~MockVoiceEngine() override {
     // Decrease ref count before base class d-tor is called; otherwise it will
@@ -32,6 +38,9 @@ class MockVoiceEngine : public VoiceEngineImpl {
     --_ref_count;
   }
 
+  // VoiceEngineImpl
+  MOCK_METHOD1(GetChannelProxy, voe::ChannelProxy*(int channel_id));
+
   // VoEAudioProcessing
   MOCK_METHOD2(SetNsStatus, int(bool enable, NsModes mode));
   MOCK_METHOD2(GetNsStatus, int(bool& enabled, NsModes& mode));
@@ -315,6 +324,11 @@ class MockVoiceEngine : public VoiceEngineImpl {
   MOCK_METHOD2(GetChannelOutputVolumeScaling, int(int channel, float& scaling));
   MOCK_METHOD3(SetOutputVolumePan, int(int channel, float left, float right));
   MOCK_METHOD3(GetOutputVolumePan, int(int channel, float& left, float& right));
+
+ private:
+  voe::ChannelProxy* CreateChannelProxy(int channel_id) {
+   return new testing::NiceMock<MockVoEChannelProxy>();
+  }
 };
 }  // namespace test
 }  // namespace webrtc