Add overhead to audio bwe min, max.

webrtc/media/engine/webrtcvoiceengine_unittest.cc

Index: webrtc/media/engine/webrtcvoiceengine_unittest.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine_unittest.cc b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
index 674924eda855b0bed233ef0768421a3c259d483d..9d9df6b63a7408cededb26b94a598ea9818a096f 100644
--- a/webrtc/media/engine/webrtcvoiceengine_unittest.cc
+++ b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
@@ -2471,6 +2471,36 @@ TEST_F(WebRtcVoiceEngineTestFake, AudioNetworkAdaptorNotGetOverridden) {
             GetAudioNetworkAdaptorConfig(kSsrc1));
 }
 
+class WebRtcVoiceEngineWithSendSideBweWithOverheadTest
+    : public WebRtcVoiceEngineTestFake {
+ public:
+  WebRtcVoiceEngineWithSendSideBweWithOverheadTest()
+      : WebRtcVoiceEngineTestFake(
+            "WebRTC-Audio-SendSideBwe/Enabled/WebRTC-SendSideBwe-WithOverhead/"
+            "Enabled/") {}
+};
+
+TEST_F(WebRtcVoiceEngineWithSendSideBweWithOverheadTest, MinAndMaxBitrate) {
+  EXPECT_TRUE(SetupSendStream());
+  cricket::AudioSendParameters parameters;
+  parameters.codecs.push_back(kOpusCodec);
+  SetSendParameters(parameters);
+  const int initial_num = call_.GetNumCreatedSendStreams();
+  EXPECT_EQ(initial_num, call_.GetNumCreatedSendStreams());
+
+  // OverheadPerPacket = Ipv4(20B) + UDP(8B) + SRTP(10B) + RTP(12)
+  constexpr int kOverheadPerPacket = 20 + 8 + 10 + 12;
+  constexpr int kMinOverheadBps = kOverheadPerPacket * 8 * 1000 / 60;
+  constexpr int kMaxOverheadBps = kOverheadPerPacket * 8 * 1000 / 20;
+
+  constexpr int kOpusMinBitrateBps = 6000;
+  EXPECT_EQ(kOpusMinBitrateBps + kMinOverheadBps,
+            GetSendStreamConfig(kSsrc1).min_bitrate_bps);
+  constexpr int kOpusBitrateFbBps = 32000;
+  EXPECT_EQ(kOpusBitrateFbBps + kMaxOverheadBps,
+            GetSendStreamConfig(kSsrc1).max_bitrate_bps);
+}
+
 // Test that we can set the outgoing SSRC properly.
 // SSRC is set in SetupSendStream() by calling AddSendStream.
 TEST_F(WebRtcVoiceEngineTestFake, SetSendSsrc) {