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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 "base/logging.h" | 5 #include "base/logging.h" |
| 6 #include "base/memory/scoped_ptr.h" | 6 #include "base/memory/scoped_ptr.h" |
| 7 #include "net/quic/congestion_control/hybrid_slow_start.h" | 7 #include "net/quic/congestion_control/hybrid_slow_start.h" |
| 8 #include "net/quic/test_tools/mock_clock.h" | 8 #include "net/quic/test_tools/mock_clock.h" |
| 9 #include "testing/gtest/include/gtest/gtest.h" | 9 #include "testing/gtest/include/gtest/gtest.h" |
| 10 | 10 |
| 11 namespace net { | 11 namespace net { |
| 12 namespace test { | 12 namespace test { |
| 13 | 13 |
| 14 class HybridSlowStartTest : public ::testing::Test { | 14 class HybridSlowStartTest : public ::testing::Test { |
| 15 protected: | 15 protected: |
| 16 HybridSlowStartTest() | 16 HybridSlowStartTest() |
| 17 : one_ms_(QuicTime::Delta::FromMilliseconds(1)), | 17 : one_ms_(QuicTime::Delta::FromMilliseconds(1)), |
| 18 rtt_(QuicTime::Delta::FromMilliseconds(60)) { | 18 rtt_(QuicTime::Delta::FromMilliseconds(60)) {} |
| 19 } | 19 virtual void SetUp() { slowStart_.reset(new HybridSlowStart(&clock_)); } |
| 20 virtual void SetUp() { | |
| 21 slowStart_.reset(new HybridSlowStart(&clock_)); | |
| 22 } | |
| 23 const QuicTime::Delta one_ms_; | 20 const QuicTime::Delta one_ms_; |
| 24 const QuicTime::Delta rtt_; | 21 const QuicTime::Delta rtt_; |
| 25 MockClock clock_; | 22 MockClock clock_; |
| 26 scoped_ptr<HybridSlowStart> slowStart_; | 23 scoped_ptr<HybridSlowStart> slowStart_; |
| 27 }; | 24 }; |
| 28 | 25 |
| 29 TEST_F(HybridSlowStartTest, Simple) { | 26 TEST_F(HybridSlowStartTest, Simple) { |
| 30 QuicPacketSequenceNumber sequence_number = 1; | 27 QuicPacketSequenceNumber sequence_number = 1; |
| 31 QuicPacketSequenceNumber end_sequence_number = 3; | 28 QuicPacketSequenceNumber end_sequence_number = 3; |
| 32 slowStart_->StartReceiveRound(end_sequence_number); | 29 slowStart_->StartReceiveRound(end_sequence_number); |
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| 57 // we expect to be able to send a burst of 30 packet before we trigger the | 54 // we expect to be able to send a burst of 30 packet before we trigger the |
| 58 // ack train detection. | 55 // ack train detection. |
| 59 const int kMaxLoopCount = 5; | 56 const int kMaxLoopCount = 5; |
| 60 QuicPacketSequenceNumber sequence_number = 2; | 57 QuicPacketSequenceNumber sequence_number = 2; |
| 61 QuicPacketSequenceNumber end_sequence_number = 2; | 58 QuicPacketSequenceNumber end_sequence_number = 2; |
| 62 for (int burst = 0; burst < kMaxLoopCount; ++burst) { | 59 for (int burst = 0; burst < kMaxLoopCount; ++burst) { |
| 63 slowStart_->StartReceiveRound(end_sequence_number); | 60 slowStart_->StartReceiveRound(end_sequence_number); |
| 64 do { | 61 do { |
| 65 clock_.AdvanceTime(one_ms_); | 62 clock_.AdvanceTime(one_ms_); |
| 66 EXPECT_FALSE(slowStart_->ShouldExitSlowStart(rtt_, rtt_, 100)); | 63 EXPECT_FALSE(slowStart_->ShouldExitSlowStart(rtt_, rtt_, 100)); |
| 67 } while (!slowStart_->IsEndOfRound(sequence_number++)); | 64 } while (!slowStart_->IsEndOfRound(sequence_number++)); |
| 68 end_sequence_number *= 2; // Exponential growth. | 65 end_sequence_number *= 2; // Exponential growth. |
| 69 } | 66 } |
| 70 slowStart_->StartReceiveRound(end_sequence_number); | 67 slowStart_->StartReceiveRound(end_sequence_number); |
| 71 | 68 |
| 72 for (int n = 0; n < 29 && !slowStart_->IsEndOfRound(sequence_number++); ++n) { | 69 for (int n = 0; n < 29 && !slowStart_->IsEndOfRound(sequence_number++); ++n) { |
| 73 clock_.AdvanceTime(one_ms_); | 70 clock_.AdvanceTime(one_ms_); |
| 74 EXPECT_FALSE(slowStart_->ShouldExitSlowStart(rtt_, rtt_, 100)); | 71 EXPECT_FALSE(slowStart_->ShouldExitSlowStart(rtt_, rtt_, 100)); |
| 75 } | 72 } |
| 76 clock_.AdvanceTime(one_ms_); | 73 clock_.AdvanceTime(one_ms_); |
| 77 EXPECT_TRUE(slowStart_->ShouldExitSlowStart(rtt_, rtt_, 100)); | 74 EXPECT_TRUE(slowStart_->ShouldExitSlowStart(rtt_, rtt_, 100)); |
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| 97 rtt_.Add(QuicTime::Delta::FromMilliseconds(n + 5)), rtt_, 100)); | 94 rtt_.Add(QuicTime::Delta::FromMilliseconds(n + 5)), rtt_, 100)); |
| 98 } | 95 } |
| 99 // Expect to trigger since all packets in this burst was above the long term | 96 // Expect to trigger since all packets in this burst was above the long term |
| 100 // RTT provided. | 97 // RTT provided. |
| 101 EXPECT_TRUE(slowStart_->ShouldExitSlowStart( | 98 EXPECT_TRUE(slowStart_->ShouldExitSlowStart( |
| 102 rtt_.Add(QuicTime::Delta::FromMilliseconds(5)), rtt_, 100)); | 99 rtt_.Add(QuicTime::Delta::FromMilliseconds(5)), rtt_, 100)); |
| 103 } | 100 } |
| 104 | 101 |
| 105 } // namespace test | 102 } // namespace test |
| 106 } // namespace net | 103 } // namespace net |
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