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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <algorithm> | 5 #include <algorithm> |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "base/stl_util.h" | 8 #include "base/stl_util.h" |
9 #include "net/quic/congestion_control/rtt_stats.h" | 9 #include "net/quic/congestion_control/rtt_stats.h" |
10 #include "net/quic/congestion_control/time_loss_algorithm.h" | 10 #include "net/quic/congestion_control/time_loss_algorithm.h" |
11 #include "net/quic/quic_unacked_packet_map.h" | 11 #include "net/quic/quic_unacked_packet_map.h" |
12 #include "net/quic/test_tools/mock_clock.h" | 12 #include "net/quic/test_tools/mock_clock.h" |
13 #include "testing/gtest/include/gtest/gtest.h" | 13 #include "testing/gtest/include/gtest/gtest.h" |
14 | 14 |
15 namespace net { | 15 namespace net { |
16 namespace test { | 16 namespace test { |
17 | 17 |
18 class TimeLossAlgorithmTest : public ::testing::Test { | 18 class TimeLossAlgorithmTest : public ::testing::Test { |
19 protected: | 19 protected: |
20 TimeLossAlgorithmTest() | 20 TimeLossAlgorithmTest() : unacked_packets_() { |
21 : unacked_packets_() { | |
22 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(100), | 21 rtt_stats_.UpdateRtt(QuicTime::Delta::FromMilliseconds(100), |
23 QuicTime::Delta::Zero(), | 22 QuicTime::Delta::Zero(), |
24 clock_.Now()); | 23 clock_.Now()); |
25 } | 24 } |
26 | 25 |
27 void SendDataPacket(QuicPacketSequenceNumber sequence_number) { | 26 void SendDataPacket(QuicPacketSequenceNumber sequence_number) { |
28 SerializedPacket packet(sequence_number, PACKET_1BYTE_SEQUENCE_NUMBER, | 27 SerializedPacket packet(sequence_number, |
29 NULL, 0, new RetransmittableFrames()); | 28 PACKET_1BYTE_SEQUENCE_NUMBER, |
| 29 NULL, |
| 30 0, |
| 31 new RetransmittableFrames()); |
30 unacked_packets_.AddPacket(packet); | 32 unacked_packets_.AddPacket(packet); |
31 unacked_packets_.SetSent(sequence_number, clock_.Now(), 1000, true); | 33 unacked_packets_.SetSent(sequence_number, clock_.Now(), 1000, true); |
32 } | 34 } |
33 | 35 |
34 void VerifyLosses(QuicPacketSequenceNumber largest_observed, | 36 void VerifyLosses(QuicPacketSequenceNumber largest_observed, |
35 QuicPacketSequenceNumber* losses_expected, | 37 QuicPacketSequenceNumber* losses_expected, |
36 size_t num_losses) { | 38 size_t num_losses) { |
37 SequenceNumberSet lost_packets = | 39 SequenceNumberSet lost_packets = loss_algorithm_.DetectLostPackets( |
38 loss_algorithm_.DetectLostPackets( | 40 unacked_packets_, clock_.Now(), largest_observed, rtt_stats_); |
39 unacked_packets_, clock_.Now(), largest_observed, rtt_stats_); | |
40 EXPECT_EQ(num_losses, lost_packets.size()); | 41 EXPECT_EQ(num_losses, lost_packets.size()); |
41 for (size_t i = 0; i < num_losses; ++i) { | 42 for (size_t i = 0; i < num_losses; ++i) { |
42 EXPECT_TRUE(ContainsKey(lost_packets, losses_expected[i])); | 43 EXPECT_TRUE(ContainsKey(lost_packets, losses_expected[i])); |
43 } | 44 } |
44 } | 45 } |
45 | 46 |
46 QuicUnackedPacketMap unacked_packets_; | 47 QuicUnackedPacketMap unacked_packets_; |
47 TimeLossAlgorithm loss_algorithm_; | 48 TimeLossAlgorithm loss_algorithm_; |
48 RttStats rtt_stats_; | 49 RttStats rtt_stats_; |
49 MockClock clock_; | 50 MockClock clock_; |
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76 // The packet should not be lost until 1.25 RTTs pass. | 77 // The packet should not be lost until 1.25 RTTs pass. |
77 unacked_packets_.NackPacket(1, 1); | 78 unacked_packets_.NackPacket(1, 1); |
78 unacked_packets_.SetNotPending(2); | 79 unacked_packets_.SetNotPending(2); |
79 VerifyLosses(2, NULL, 0); | 80 VerifyLosses(2, NULL, 0); |
80 // Expect the timer to be set to 0.25 RTT's in the future. | 81 // Expect the timer to be set to 0.25 RTT's in the future. |
81 EXPECT_EQ(rtt_stats_.SmoothedRtt().Multiply(0.25), | 82 EXPECT_EQ(rtt_stats_.SmoothedRtt().Multiply(0.25), |
82 loss_algorithm_.GetLossTimeout().Subtract(clock_.Now())); | 83 loss_algorithm_.GetLossTimeout().Subtract(clock_.Now())); |
83 unacked_packets_.NackPacket(1, 5); | 84 unacked_packets_.NackPacket(1, 5); |
84 VerifyLosses(2, NULL, 0); | 85 VerifyLosses(2, NULL, 0); |
85 clock_.AdvanceTime(rtt_stats_.SmoothedRtt().Multiply(0.25)); | 86 clock_.AdvanceTime(rtt_stats_.SmoothedRtt().Multiply(0.25)); |
86 QuicPacketSequenceNumber lost[] = { 1 }; | 87 QuicPacketSequenceNumber lost[] = {1}; |
87 VerifyLosses(2, lost, arraysize(lost)); | 88 VerifyLosses(2, lost, arraysize(lost)); |
88 EXPECT_EQ(QuicTime::Zero(), loss_algorithm_.GetLossTimeout()); | 89 EXPECT_EQ(QuicTime::Zero(), loss_algorithm_.GetLossTimeout()); |
89 } | 90 } |
90 | 91 |
91 TEST_F(TimeLossAlgorithmTest, NoLossWithoutNack) { | 92 TEST_F(TimeLossAlgorithmTest, NoLossWithoutNack) { |
92 const size_t kNumSentPackets = 10; | 93 const size_t kNumSentPackets = 10; |
93 // Transmit 10 packets at 1/10th an RTT interval. | 94 // Transmit 10 packets at 1/10th an RTT interval. |
94 for (size_t i = 1; i <= kNumSentPackets; ++i) { | 95 for (size_t i = 1; i <= kNumSentPackets; ++i) { |
95 SendDataPacket(i); | 96 SendDataPacket(i); |
96 clock_.AdvanceTime(rtt_stats_.SmoothedRtt().Multiply(0.1)); | 97 clock_.AdvanceTime(rtt_stats_.SmoothedRtt().Multiply(0.1)); |
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122 // The packet should not be lost until 1.25 RTTs pass. | 123 // The packet should not be lost until 1.25 RTTs pass. |
123 for (size_t i = 1; i < kNumSentPackets; ++i) { | 124 for (size_t i = 1; i < kNumSentPackets; ++i) { |
124 unacked_packets_.NackPacket(i, 1); | 125 unacked_packets_.NackPacket(i, 1); |
125 } | 126 } |
126 unacked_packets_.SetNotPending(10); | 127 unacked_packets_.SetNotPending(10); |
127 VerifyLosses(10, NULL, 0); | 128 VerifyLosses(10, NULL, 0); |
128 // Expect the timer to be set to 0.25 RTT's in the future. | 129 // Expect the timer to be set to 0.25 RTT's in the future. |
129 EXPECT_EQ(rtt_stats_.SmoothedRtt().Multiply(0.25), | 130 EXPECT_EQ(rtt_stats_.SmoothedRtt().Multiply(0.25), |
130 loss_algorithm_.GetLossTimeout().Subtract(clock_.Now())); | 131 loss_algorithm_.GetLossTimeout().Subtract(clock_.Now())); |
131 clock_.AdvanceTime(rtt_stats_.SmoothedRtt().Multiply(0.25)); | 132 clock_.AdvanceTime(rtt_stats_.SmoothedRtt().Multiply(0.25)); |
132 QuicPacketSequenceNumber lost[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; | 133 QuicPacketSequenceNumber lost[] = {1, 2, 3, 4, 5, 6, 7, 8, 9}; |
133 VerifyLosses(10, lost, arraysize(lost)); | 134 VerifyLosses(10, lost, arraysize(lost)); |
134 EXPECT_EQ(QuicTime::Zero(), loss_algorithm_.GetLossTimeout()); | 135 EXPECT_EQ(QuicTime::Zero(), loss_algorithm_.GetLossTimeout()); |
135 } | 136 } |
136 | 137 |
137 } // namespace test | 138 } // namespace test |
138 } // namespace net | 139 } // namespace net |
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