1 files changed, 22 insertions, 2 deletions
diff --git a/pc/peer_connection_simulcast_unittest.cc b/pc/peer_connection_simulcast_unittest.cc
index 8822a980f7..31385754b7 100644
--- a/pc/peer_connection_simulcast_unittest.cc
+++ b/pc/peer_connection_simulcast_unittest.cc
@@ -157,9 +157,10 @@ class PeerConnectionSimulcastTests : public ::testing::Test {
 
   rtc::scoped_refptr<RtpTransceiverInterface> AddTransceiver(
       PeerConnectionWrapper* pc,
-      const std::vector<SimulcastLayer>& layers) {
+      const std::vector<SimulcastLayer>& layers,
+      cricket::MediaType media_type = cricket::MEDIA_TYPE_VIDEO) {
     auto init = CreateTransceiverInit(layers);
-    return pc->AddTransceiver(cricket::MEDIA_TYPE_VIDEO, init);
+    return pc->AddTransceiver(media_type, init);
   }
 
   SimulcastDescription RemoveSimulcast(SessionDescriptionInterface* sd) {
@@ -556,6 +557,25 @@ TEST_F(PeerConnectionSimulcastTests, NegotiationDoesNotHaveRidExtension) {
   ValidateTransceiverParameters(transceiver, expected_layers);
 }
 
+TEST_F(PeerConnectionSimulcastTests, SimulcastAudioRejected) {
+  auto local = CreatePeerConnectionWrapper();
+  auto remote = CreatePeerConnectionWrapper();
+  auto layers = CreateLayers({"1", "2", "3", "4"}, true);
+  auto transceiver =
+      AddTransceiver(local.get(), layers, cricket::MEDIA_TYPE_AUDIO);
+  // Should only have the first layer.
+  auto parameters = transceiver->sender()->GetParameters();
+  EXPECT_EQ(1u, parameters.encodings.size());
+  EXPECT_THAT(parameters.encodings,
+              ElementsAre(Field("rid", &RtpEncodingParameters::rid, Eq(""))));
+  ExchangeOfferAnswer(local.get(), remote.get(), {});
+  // Still have a single layer after negotiation
+  parameters = transceiver->sender()->GetParameters();
+  EXPECT_EQ(1u, parameters.encodings.size());
+  EXPECT_THAT(parameters.encodings,
+              ElementsAre(Field("rid", &RtpEncodingParameters::rid, Eq(""))));
+}
+
 #if RTC_METRICS_ENABLED
 //
 // Checks the logged metrics when simulcast is not used.