Reland "Remove ViEEncoder::SetNetworkStatus"

webrtc/call/bitrate_allocator_unittest.cc

 /*
  *  Copyright (c) 2012 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 204 matching lines @@
   // Low REMB. Verify that all observers still get their respective min bitrate.
   allocator_->OnNetworkChanged(1000, 0, 0);
   EXPECT_EQ(100000u, bitrate_observer_1.last_bitrate_);  // Min cap.
   EXPECT_EQ(200000u, bitrate_observer_2.last_bitrate_);  // Min cap.
   EXPECT_EQ(300000u, bitrate_observer_3.last_bitrate_);  // Min cap.
 
   allocator_->RemoveObserver(&bitrate_observer_1);
   allocator_->RemoveObserver(&bitrate_observer_2);
   allocator_->RemoveObserver(&bitrate_observer_3);
 }
+
+TEST_F(BitrateAllocatorTest, AddObserverWhileNetworkDown) {
+  TestBitrateObserver bitrate_observer_1;
+  int start_bitrate =
+      allocator_->AddObserver(&bitrate_observer_1, 50000, 400000, true);
+  EXPECT_EQ(300000, start_bitrate);
+
+  // Set network down, ie, no available bitrate.
+  allocator_->OnNetworkChanged(0, 0, 0);
+
+  EXPECT_EQ(0u, bitrate_observer_1.last_bitrate_);
+
+  TestBitrateObserver bitrate_observer_2;
+  start_bitrate =
+      allocator_->AddObserver(&bitrate_observer_2, 50000, 400000, true);
+
+  // Expect the start_bitrate to be set as if the network was still up but that
+  // the new observer have been notified that the network is down.
+  EXPECT_EQ(300000 / 2, start_bitrate);
+  EXPECT_EQ(0u, bitrate_observer_1.last_bitrate_);
+  EXPECT_EQ(0u, bitrate_observer_2.last_bitrate_);
+
+  // Set network back up.
+  allocator_->OnNetworkChanged(1500000, 0, 50);
+  EXPECT_EQ(750000u, bitrate_observer_1.last_bitrate_);
+  EXPECT_EQ(750000u, bitrate_observer_2.last_bitrate_);
+}
+
 }  // namespace webrtc