Tweaked version of BBR for WebRTC.

webrtc/modules/remote_bitrate_estimator/test/estimators/congestion_window_unittest.cc

 /*
  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/remote_bitrate_estimator/test/estimators/congestion_window.h"
 #include "webrtc/modules/remote_bitrate_estimator/test/estimators/bbr.h"
 
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
 namespace testing {
 namespace bwe {
 namespace {
-// These are the same values used in CongestionWindow class.
+// Same value used in CongestionWindow class.
 const int64_t kStartingCongestionWindow = 6000;
-const int64_t kMinimumCongestionWindow = 4000;
 }  // namespace
 
 TEST(CongestionWindowTest, InitializationCheck) {
   CongestionWindow congestion_window;
   congestion_window.PacketSent(0);
   EXPECT_EQ(congestion_window.data_inflight(), 0u);
   congestion_window.AckReceived(0);
   EXPECT_EQ(congestion_window.data_inflight(), 0u);
 }
 
@@ skipping 11 matching lines @@
 }
 
 TEST(CongestionWindowTest, ZeroBandwidthDelayProduct) {
   CongestionWindow congestion_window;
   int64_t target_congestion_window =
       congestion_window.GetTargetCongestionWindow(
           100, rtc::Optional<int64_t>(0), 2.885f);
   EXPECT_EQ(target_congestion_window, 2.885f * kStartingCongestionWindow);
 }
 
-TEST(CongestionWindowTest, BelowMinimumTargetCongestionWindow) {
-  CongestionWindow congestion_window;
-  int64_t target_congestion_window =
-      congestion_window.GetTargetCongestionWindow(
-          100, rtc::Optional<int64_t>(2), 2.885f);
-  EXPECT_EQ(target_congestion_window, kMinimumCongestionWindow);
-}
-
-TEST(CongestionWindowTest, AboveMinimumTargetCongestionWindow) {
-  CongestionWindow congestion_window;
-  int64_t target_congestion_window =
-      congestion_window.GetTargetCongestionWindow(
-          100000, rtc::Optional<int64_t>(2), 2.885f);
-  EXPECT_EQ(target_congestion_window, 577000);
-}
-
-TEST(CongestionWindowTest, MinimumCongestionWindow) {
-  CongestionWindow congestion_window;
-  int64_t cwnd = congestion_window.GetCongestionWindow(
-      BbrBweSender::PROBE_RTT, 100, rtc::Optional<int64_t>(100), 2.885f);
-  EXPECT_EQ(cwnd, kMinimumCongestionWindow);
-}
-
 TEST(CongestionWindowTest, CalculateCongestionWindow) {
   CongestionWindow congestion_window;
   int64_t cwnd = congestion_window.GetCongestionWindow(
-      BbrBweSender::STARTUP, 100, rtc::Optional<int64_t>(100l), 2.885f);
+      BbrBweSender::STARTUP, 800000, rtc::Optional<int64_t>(100l), 2.885f);
+  EXPECT_EQ(cwnd, 28850);
+  cwnd = congestion_window.GetCongestionWindow(
+      BbrBweSender::STARTUP, 400000, rtc::Optional<int64_t>(200l), 2.885f);
   EXPECT_EQ(cwnd, 28850);
 }
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc