Probe bitrate estimator correction.

webrtc/modules/congestion_controller/probe_bitrate_controller_unittest.cc

-/*
- *  Copyright (c) 2016 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/congestion_controller/probe_bitrate_estimator.h"
-
-#include <vector>
-#include <utility>
-
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "webrtc/modules/remote_bitrate_estimator/aimd_rate_control.h"
-
-namespace webrtc {
-
-class TestProbeBitrateEstimator : public ::testing::Test {
- public:
-  TestProbeBitrateEstimator() : probe_bitrate_estimator_() {}
-
-  void AddPacketFeedback(int probe_cluster_id,
-                         size_t size,
-                         int64_t send_time_ms,
-                         int64_t arrival_time_ms) {
-    PacketInfo info(arrival_time_ms, send_time_ms, 0, size, probe_cluster_id);
-    ProbingResult res = probe_bitrate_estimator_.PacketFeedback(info);
-    if (res.bps != ProbingResult::kNoEstimate)
-      results_.emplace_back(res.bps, res.timestamp);
-  }
-
-  void CheckResult(size_t index, int bps, int max_diff, int64_t timestamp) {
-    ASSERT_GT(results_.size(), index);
-    EXPECT_NEAR(results_[index].first, bps, max_diff);
-    EXPECT_EQ(results_[index].second, timestamp);
-  }
-
- protected:
-  std::vector<std::pair<int, int64_t>> results_;
-  ProbeBitrateEstimator probe_bitrate_estimator_;
-};
-
-TEST_F(TestProbeBitrateEstimator, OneCluster) {
-  AddPacketFeedback(0, 1000, 0, 10);
-  AddPacketFeedback(0, 1000, 10, 20);
-  AddPacketFeedback(0, 1000, 20, 30);
-  AddPacketFeedback(0, 1000, 40, 50);
-
-  CheckResult(0, 100000, 10, 50);
-}
-
-TEST_F(TestProbeBitrateEstimator, FastReceive) {
-  AddPacketFeedback(0, 1000, 0, 15);
-  AddPacketFeedback(0, 1000, 10, 30);
-  AddPacketFeedback(0, 1000, 20, 40);
-  AddPacketFeedback(0, 1000, 40, 50);
-
-  CheckResult(0, 100000, 10, 50);
-}
-
-TEST_F(TestProbeBitrateEstimator, TooFastReceive) {
-  AddPacketFeedback(0, 1000, 0, 19);
-  AddPacketFeedback(0, 1000, 10, 30);
-  AddPacketFeedback(0, 1000, 20, 40);
-  AddPacketFeedback(0, 1000, 40, 50);
-
-  EXPECT_TRUE(results_.empty());
-}
-
-TEST_F(TestProbeBitrateEstimator, SlowReceive) {
-  AddPacketFeedback(0, 1000, 0, 10);
-  AddPacketFeedback(0, 1000, 10, 40);
-  AddPacketFeedback(0, 1000, 20, 70);
-  AddPacketFeedback(0, 1000, 40, 110);
-
-  CheckResult(0, 40000, 10, 110);
-}
-
-TEST_F(TestProbeBitrateEstimator, BurstReceive) {
-  AddPacketFeedback(0, 1000, 0, 50);
-  AddPacketFeedback(0, 1000, 10, 50);
-  AddPacketFeedback(0, 1000, 20, 50);
-  AddPacketFeedback(0, 1000, 40, 50);
-
-  EXPECT_TRUE(results_.empty());
-}
-
-TEST_F(TestProbeBitrateEstimator, MultipleClusters) {
-  AddPacketFeedback(0, 1000, 0, 10);
-  AddPacketFeedback(0, 1000, 10, 20);
-  AddPacketFeedback(0, 1000, 20, 30);
-  AddPacketFeedback(0, 1000, 40, 60);
-  AddPacketFeedback(0, 1000, 50, 60);
-
-  CheckResult(0, 80000, 10, 60);
-  CheckResult(1, 100000, 10, 60);
-
-  AddPacketFeedback(1, 1000, 60, 70);
-  AddPacketFeedback(1, 1000, 65, 77);
-  AddPacketFeedback(1, 1000, 70, 84);
-  AddPacketFeedback(1, 1000, 75, 90);
-
-  CheckResult(2, 200000, 10, 90);
-}
-
-TEST_F(TestProbeBitrateEstimator, OldProbe) {
-  AddPacketFeedback(0, 1000, 0, 10);
-  AddPacketFeedback(0, 1000, 10, 20);
-  AddPacketFeedback(0, 1000, 20, 30);
-
-  AddPacketFeedback(1, 1000, 60, 70);
-  AddPacketFeedback(1, 1000, 65, 77);
-  AddPacketFeedback(1, 1000, 70, 84);
-  AddPacketFeedback(1, 1000, 75, 90);
-
-  CheckResult(0, 200000, 10, 90);
-
-  AddPacketFeedback(0, 1000, 40, 60);
-
-  EXPECT_EQ(1ul, results_.size());
-}
-
-}  // namespace webrtc