Change the number of emulated connections in QUIC's congestion control

net/quic/quic_sent_packet_manager_test.cc

Index: net/quic/quic_sent_packet_manager_test.cc
diff --git a/net/quic/quic_sent_packet_manager_test.cc b/net/quic/quic_sent_packet_manager_test.cc
index 5eabf86a5a617883cc574e68515fc41d70e77eec..71adc12008d9bbc7621cd803f848d57397543ee3 100644
--- a/net/quic/quic_sent_packet_manager_test.cc
+++ b/net/quic/quic_sent_packet_manager_test.cc
@@ -1355,6 +1355,25 @@ TEST_F(QuicSentPacketManagerTest, NegotiateNumConnectionsFromOptions) {
   manager_.SetFromConfig(client_config);
 }
 
+TEST_F(QuicSentPacketManagerTest, NegotiateNConnectionFromOptions) {
+  // By default, changing the number of open streams does nothing.
+  manager_.SetNumOpenStreams(5);
+
+  QuicConfig config;
+  QuicTagVector options;
+
+  options.push_back(kNCON);
+  QuicConfigPeer::SetReceivedConnectionOptions(&config, options);
+  EXPECT_CALL(*network_change_visitor_, OnCongestionWindowChange(_));
+  EXPECT_CALL(*send_algorithm_, GetCongestionWindow())
+      .WillOnce(Return(100 * kDefaultTCPMSS));
+  EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
+  manager_.SetFromConfig(config);
+
+  EXPECT_CALL(*send_algorithm_, SetNumEmulatedConnections(5));
+  manager_.SetNumOpenStreams(5);
+}
+
 TEST_F(QuicSentPacketManagerTest, NegotiateNoTLPFromOptionsAtServer) {
   QuicConfig config;
   QuicTagVector options;