Make the audio channel communicate network state changes to the call.

webrtc/media/engine/webrtcvoiceengine_unittest.cc

Index: webrtc/media/engine/webrtcvoiceengine_unittest.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine_unittest.cc b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
index 1e23d381cd1ca7298c3ed9d21da840910f418d6f..d3df65cbd877d31ac088230cb524cb027956bef3 100644
--- a/webrtc/media/engine/webrtcvoiceengine_unittest.cc
+++ b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
@@ -3159,6 +3159,29 @@ TEST_F(WebRtcVoiceEngineTestFake, SetRawAudioSinkDefaultRecvStream) {
   EXPECT_NE(nullptr, GetRecvStream(0x01).sink());
 }
 
+// Test that, just like the video channel, the voice channel communicates the
+// network state to the call.
+TEST_F(WebRtcVoiceEngineTestFake, OnReadyToSendSignalsNetworkState) {
+  EXPECT_TRUE(SetupEngine());
+
+  EXPECT_EQ(webrtc::ChannelNetworkState::CHANNEL_NETWORK_UP,
+      call_.GetNetworkState(webrtc::MediaType::AUDIO));
+  EXPECT_EQ(webrtc::ChannelNetworkState::CHANNEL_NOT_PRESENT,
+      call_.GetNetworkState(webrtc::MediaType::VIDEO));
+
+  channel_->OnReadyToSend(false);
+  EXPECT_EQ(webrtc::ChannelNetworkState::CHANNEL_NETWORK_DOWN,
+      call_.GetNetworkState(webrtc::MediaType::AUDIO));
+  EXPECT_EQ(webrtc::ChannelNetworkState::CHANNEL_NOT_PRESENT,
+      call_.GetNetworkState(webrtc::MediaType::VIDEO));
+
+  channel_->OnReadyToSend(true);
+  EXPECT_EQ(webrtc::ChannelNetworkState::CHANNEL_NETWORK_UP,
+      call_.GetNetworkState(webrtc::MediaType::AUDIO));
+  EXPECT_EQ(webrtc::ChannelNetworkState::CHANNEL_NOT_PRESENT,
+      call_.GetNetworkState(webrtc::MediaType::VIDEO));
+}
+
 // Tests that the library initializes and shuts down properly.
 TEST(WebRtcVoiceEngineTest, StartupShutdown) {
   cricket::WebRtcVoiceEngine engine;