Nack count returned on OnReceivedPacket.

webrtc/modules/video_coding/nack_module_unittest.cc

 /*
  *  Copyright (c) 2016 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 272 matching lines @@
   EXPECT_EQ(30u, sent_nacks_.size());
 
   sent_nacks_.clear();
   clock_->AdvanceTimeMilliseconds(100);
   nack_module_.ClearUpTo(0);
   nack_module_.Process();
   EXPECT_EQ(15u, sent_nacks_.size());
   EXPECT_EQ(0, sent_nacks_[0]);
 }
 
+TEST_F(TestNackModule, PacketNackCount) {
+  VCMPacket packet;
+  packet.seqNum = 0;
+  EXPECT_EQ(0, nack_module_.OnReceivedPacket(packet));
+  packet.seqNum = 2;
+  EXPECT_EQ(0, nack_module_.OnReceivedPacket(packet));
+  packet.seqNum = 1;
+  EXPECT_EQ(1, nack_module_.OnReceivedPacket(packet));
+
+  sent_nacks_.clear();
+  nack_module_.UpdateRtt(100);
+  packet.seqNum = 5;
+  EXPECT_EQ(0, nack_module_.OnReceivedPacket(packet));
+  clock_->AdvanceTimeMilliseconds(100);
+  nack_module_.Process();
+  clock_->AdvanceTimeMilliseconds(100);
+  nack_module_.Process();
+  packet.seqNum = 3;
+  EXPECT_EQ(3, nack_module_.OnReceivedPacket(packet));
+  packet.seqNum = 4;
+  EXPECT_EQ(3, nack_module_.OnReceivedPacket(packet));
+  EXPECT_EQ(0, nack_module_.OnReceivedPacket(packet));
+}
+
 }  // namespace webrtc