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

webrtc/call/call_unittest.cc

 /*
  *  Copyright (c) 2015 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 88 matching lines @@
       } else {
         streams.push_front(stream);
       }
     }
     for (auto s : streams) {
       call->DestroyAudioReceiveStream(s);
     }
     streams.clear();
   }
 }
+
+TEST(CallTest, AggregateNetworkState_DownOnlyIfAllChannelsAreDown) {
+  EXPECT_EQ(kNetworkUp, AggregateNetworkState(
+      ChannelNetworkState::CHANNEL_NOT_PRESENT,
+      ChannelNetworkState::CHANNEL_NOT_PRESENT));
+  EXPECT_EQ(kNetworkUp, AggregateNetworkState(
+      ChannelNetworkState::CHANNEL_NETWORK_UP,
+      ChannelNetworkState::CHANNEL_NOT_PRESENT));
+  EXPECT_EQ(kNetworkUp, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NOT_PRESENT,
+    ChannelNetworkState::CHANNEL_NETWORK_UP));
+  EXPECT_EQ(kNetworkUp, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NETWORK_UP,
+    ChannelNetworkState::CHANNEL_NETWORK_UP));
+  EXPECT_EQ(kNetworkUp, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NETWORK_DOWN,
+    ChannelNetworkState::CHANNEL_NETWORK_UP));
+  EXPECT_EQ(kNetworkUp, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NETWORK_UP,
+    ChannelNetworkState::CHANNEL_NETWORK_DOWN));
+
+  EXPECT_EQ(kNetworkDown, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NETWORK_DOWN,
+    ChannelNetworkState::CHANNEL_NOT_PRESENT));
+  EXPECT_EQ(kNetworkDown, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NOT_PRESENT,
+    ChannelNetworkState::CHANNEL_NETWORK_DOWN));
+  EXPECT_EQ(kNetworkDown, AggregateNetworkState(
+    ChannelNetworkState::CHANNEL_NETWORK_DOWN,
+    ChannelNetworkState::CHANNEL_NETWORK_DOWN));
+}
+
 }  // namespace webrtc