Nack count returned on OnReceivedPacket.

webrtc/modules/video_coding/nack_module_unittest.cc

Index: webrtc/modules/video_coding/nack_module_unittest.cc
diff --git a/webrtc/modules/video_coding/nack_module_unittest.cc b/webrtc/modules/video_coding/nack_module_unittest.cc
index 3870742016a0a39120dcdb3375536d6d439c8646..9c2eb4ac0c3f0706295a3a89cef58243c47294c8 100644
--- a/webrtc/modules/video_coding/nack_module_unittest.cc
+++ b/webrtc/modules/video_coding/nack_module_unittest.cc
@@ -290,4 +290,28 @@ TEST_F(TestNackModule, ClearUpToWrap) {
   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