QUIC: Only send a new SCUP if enough packets have been sent since the

net/tools/quic/quic_server_session_test.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/quic/quic_server_session.h"
 
 #include "net/quic/crypto/quic_crypto_server_config.h"
 #include "net/quic/crypto/quic_random.h"
 #include "net/quic/crypto/source_address_token.h"
 #include "net/quic/quic_connection.h"
@@ skipping 321 matching lines @@
   // There will be no update sent yet - not enough time has passed.
   QuicTime now = QuicTime::Zero();
   session_->OnCongestionWindowChange(now);
 
   // Bandwidth estimate has now changed sufficiently but not enough time has
   // passed to send a Server Config Update.
   bandwidth_estimate_kbytes_per_second =
       bandwidth_estimate_kbytes_per_second * 1.6;
   session_->OnCongestionWindowChange(now);
 
-  // Bandwidth estimate has now changed sufficiently and enough time has passed.
+  // Bandwidth estimate has now changed sufficiently and enough time has passed,
+  // but not enough packets have been sent.
   int64 srtt_ms =
       sent_packet_manager->GetRttStats()->SmoothedRtt().ToMilliseconds();
   now = now.Add(QuicTime::Delta::FromMilliseconds(
       kMinIntervalBetweenServerConfigUpdatesRTTs * srtt_ms));
+  session_->OnCongestionWindowChange(now);
+
+  // Bandwidth estimate has now changed sufficiently, enough time has passed,
+  // and enough packets have been sent.
+  QuicConnectionPeer::SetSequenceNumberOfLastSentPacket(
+      session_->connection(), kMinPacketsBetweenServerConfigUpdates);
 
   // Verify that the proto has exactly the values we expect.
   CachedNetworkParameters expected_network_params;
   expected_network_params.set_bandwidth_estimate_bytes_per_second(
       bandwidth_recorder.BandwidthEstimate().ToBytesPerSecond());
   expected_network_params.set_max_bandwidth_estimate_bytes_per_second(
       bandwidth_recorder.MaxBandwidthEstimate().ToBytesPerSecond());
   expected_network_params.set_max_bandwidth_timestamp_seconds(
       bandwidth_recorder.MaxBandwidthTimestamp());
   expected_network_params.set_min_rtt_ms(session_->connection()
@@ skipping 10 matching lines @@
   EXPECT_CALL(*crypto_stream,
               SendServerConfigUpdate(EqualsProto(expected_network_params)))
       .Times(1);
   session_->OnCongestionWindowChange(now);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace tools
 }  // namespace net