| /* |
| * 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 "testing/gmock/include/gmock/gmock.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "webrtc/call/mock/mock_rtc_event_log.h" |
| #include "webrtc/modules/pacing/mock/mock_paced_sender.h" |
| #include "webrtc/modules/congestion_controller/include/congestion_controller.h" |
| #include "webrtc/modules/congestion_controller/include/mock/mock_congestion_controller.h" |
| #include "webrtc/modules/remote_bitrate_estimator/include/mock/mock_remote_bitrate_observer.h" |
| #include "webrtc/system_wrappers/include/clock.h" |
| |
| using testing::_; |
| using testing::NiceMock; |
| using testing::Return; |
| using testing::SaveArg; |
| using testing::StrictMock; |
| |
| namespace webrtc { |
| namespace test { |
| |
| class CongestionControllerTest : public ::testing::Test { |
| protected: |
| CongestionControllerTest() : clock_(123456) {} |
| ~CongestionControllerTest() override {} |
| |
| void SetUp() override { |
| pacer_ = new NiceMock<MockPacedSender>(); |
| std::unique_ptr<PacedSender> pacer(pacer_); // Passes ownership. |
| std::unique_ptr<PacketRouter> packet_router(new PacketRouter()); |
| controller_.reset(new CongestionController( |
| &clock_, &observer_, &remote_bitrate_observer_, &event_log_, |
| std::move(packet_router), std::move(pacer))); |
| bandwidth_observer_.reset( |
| controller_->GetBitrateController()->CreateRtcpBandwidthObserver()); |
| |
| // Set the initial bitrate estimate and expect the |observer| and |pacer_| |
| // to be updated. |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps, _, _)); |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(kInitialBitrateBps)); |
| controller_->SetBweBitrates(0, kInitialBitrateBps, 5 * kInitialBitrateBps); |
| } |
| |
| SimulatedClock clock_; |
| StrictMock<MockCongestionObserver> observer_; |
| NiceMock<MockPacedSender>* pacer_; |
| NiceMock<MockRemoteBitrateObserver> remote_bitrate_observer_; |
| NiceMock<MockRtcEventLog> event_log_; |
| std::unique_ptr<RtcpBandwidthObserver> bandwidth_observer_; |
| std::unique_ptr<CongestionController> controller_; |
| const uint32_t kInitialBitrateBps = 60000; |
| }; |
| |
| TEST_F(CongestionControllerTest, OnNetworkChanged) { |
| // Test no change. |
| clock_.AdvanceTimeMilliseconds(25); |
| controller_->Process(); |
| |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps * 2, _, _)); |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(kInitialBitrateBps * 2)); |
| bandwidth_observer_->OnReceivedEstimatedBitrate(kInitialBitrateBps * 2); |
| clock_.AdvanceTimeMilliseconds(25); |
| controller_->Process(); |
| |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps, _, _)); |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(kInitialBitrateBps)); |
| bandwidth_observer_->OnReceivedEstimatedBitrate(kInitialBitrateBps); |
| clock_.AdvanceTimeMilliseconds(25); |
| controller_->Process(); |
| } |
| |
| TEST_F(CongestionControllerTest, OnSendQueueFull) { |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillOnce(Return(PacedSender::kMaxQueueLengthMs + 1)); |
| |
| EXPECT_CALL(observer_, OnNetworkChanged(0, _, _)); |
| controller_->Process(); |
| |
| // Let the pacer not be full next time the controller checks. |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillOnce(Return(PacedSender::kMaxQueueLengthMs - 1)); |
| |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps, _, _)); |
| controller_->Process(); |
| } |
| |
| TEST_F(CongestionControllerTest, OnSendQueueFullAndEstimateChange) { |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillOnce(Return(PacedSender::kMaxQueueLengthMs + 1)); |
| EXPECT_CALL(observer_, OnNetworkChanged(0, _, _)); |
| controller_->Process(); |
| |
| // Receive new estimate but let the queue still be full. |
| bandwidth_observer_->OnReceivedEstimatedBitrate(kInitialBitrateBps * 2); |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillOnce(Return(PacedSender::kMaxQueueLengthMs + 1)); |
| // The send pacer should get the new estimate though. |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(kInitialBitrateBps * 2)); |
| clock_.AdvanceTimeMilliseconds(25); |
| controller_->Process(); |
| |
| // Let the pacer not be full next time the controller checks. |
| // |OnNetworkChanged| should be called with the new estimate. |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillOnce(Return(PacedSender::kMaxQueueLengthMs - 1)); |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps * 2, _, _)); |
| clock_.AdvanceTimeMilliseconds(25); |
| controller_->Process(); |
| } |
| |
| TEST_F(CongestionControllerTest, SignalNetworkState) { |
| EXPECT_CALL(observer_, OnNetworkChanged(0, _, _)); |
| controller_->SignalNetworkState(kNetworkDown); |
| |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps, _, _)); |
| controller_->SignalNetworkState(kNetworkUp); |
| |
| EXPECT_CALL(observer_, OnNetworkChanged(0, _, _)); |
| controller_->SignalNetworkState(kNetworkDown); |
| } |
| |
| TEST_F(CongestionControllerTest, ResetBweAndBitrates) { |
| int new_bitrate = 200000; |
| EXPECT_CALL(observer_, OnNetworkChanged(new_bitrate, _, _)); |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(new_bitrate)); |
| controller_->ResetBweAndBitrates(new_bitrate, -1, -1); |
| |
| // If the bitrate is reset to -1, the new starting bitrate will be |
| // the minimum default bitrate 10000bps. |
| int min_default_bitrate = 10000; |
| EXPECT_CALL(observer_, OnNetworkChanged(min_default_bitrate, _, _)); |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(min_default_bitrate)); |
| controller_->ResetBweAndBitrates(-1, -1, -1); |
| } |
| |
| TEST_F(CongestionControllerTest, |
| SignalNetworkStateAndQueueIsFullAndEstimateChange) { |
| // Send queue is full |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillRepeatedly(Return(PacedSender::kMaxQueueLengthMs + 1)); |
| EXPECT_CALL(observer_, OnNetworkChanged(0, _, _)); |
| controller_->Process(); |
| |
| // Queue is full and network is down. Expect no bitrate change. |
| controller_->SignalNetworkState(kNetworkDown); |
| controller_->Process(); |
| |
| // Queue is full but network is up. Expect no bitrate change. |
| controller_->SignalNetworkState(kNetworkUp); |
| controller_->Process(); |
| |
| // Receive new estimate but let the queue still be full. |
| EXPECT_CALL(*pacer_, SetEstimatedBitrate(kInitialBitrateBps * 2)); |
| bandwidth_observer_->OnReceivedEstimatedBitrate(kInitialBitrateBps * 2); |
| clock_.AdvanceTimeMilliseconds(25); |
| controller_->Process(); |
| |
| // Let the pacer not be full next time the controller checks. |
| EXPECT_CALL(*pacer_, ExpectedQueueTimeMs()) |
| .WillOnce(Return(PacedSender::kMaxQueueLengthMs - 1)); |
| EXPECT_CALL(observer_, OnNetworkChanged(kInitialBitrateBps * 2, _, _)); |
| controller_->Process(); |
| } |
| |
| } // namespace test |
| } // namespace webrtc |