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

webrtc/media/engine/webrtcvoiceengine_unittest.cc

 /*
  *  Copyright (c) 2008 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 3175 matching lines @@
   // Try setting the default sink while the default stream exists.
   channel_->SetRawAudioSink(0, std::move(fake_sink_2));
   EXPECT_NE(nullptr, GetRecvStream(0x01).sink());
 
   // If we remove and add a default stream, it should get the same sink.
   EXPECT_TRUE(channel_->RemoveRecvStream(0x01));
   DeliverPacket(kPcmuFrame, sizeof(kPcmuFrame));
   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::kNetworkUp,
+            call_.GetNetworkState(webrtc::MediaType::AUDIO));
+  EXPECT_EQ(webrtc::kNetworkUp,
+            call_.GetNetworkState(webrtc::MediaType::VIDEO));
+
+  channel_->OnReadyToSend(false);
+  EXPECT_EQ(webrtc::kNetworkDown,
+            call_.GetNetworkState(webrtc::MediaType::AUDIO));
+  EXPECT_EQ(webrtc::kNetworkUp,
+            call_.GetNetworkState(webrtc::MediaType::VIDEO));
+
+  channel_->OnReadyToSend(true);
+  EXPECT_EQ(webrtc::kNetworkUp,
+            call_.GetNetworkState(webrtc::MediaType::AUDIO));
+  EXPECT_EQ(webrtc::kNetworkUp,
+            call_.GetNetworkState(webrtc::MediaType::VIDEO));
+}
+
 // Tests that the library initializes and shuts down properly.
 TEST(WebRtcVoiceEngineTest, StartupShutdown) {
   cricket::WebRtcVoiceEngine engine;
   EXPECT_TRUE(engine.Init(rtc::Thread::Current()));
   std::unique_ptr<webrtc::Call> call(
       webrtc::Call::Create(webrtc::Call::Config()));
   cricket::VoiceMediaChannel* channel = engine.CreateChannel(
       call.get(), cricket::MediaConfig(), cricket::AudioOptions());
   EXPECT_TRUE(channel != nullptr);
   delete channel;
@@ skipping 120 matching lines @@
   cricket::WebRtcVoiceEngine engine;
   EXPECT_TRUE(engine.Init(rtc::Thread::Current()));
   std::unique_ptr<webrtc::Call> call(
       webrtc::Call::Create(webrtc::Call::Config()));
   cricket::WebRtcVoiceMediaChannel channel(&engine, cricket::MediaConfig(),
                                            cricket::AudioOptions(), call.get());
   cricket::AudioRecvParameters parameters;
   parameters.codecs = engine.codecs();
   EXPECT_TRUE(channel.SetRecvParameters(parameters));
 }