1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "net/quic/congestion_control/paced_sender.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/test_tools/mock_clock.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace test {
const int kHundredKBytesPerS = 100;
class PacedSenderTest : public ::testing::Test {
protected:
PacedSenderTest()
: zero_time_(QuicTime::Delta::Zero()),
paced_sender_(new PacedSender(
QuicBandwidth::FromKBytesPerSecond(kHundredKBytesPerS),
kDefaultMaxPacketSize)) {
}
const QuicTime::Delta zero_time_;
MockClock clock_;
scoped_ptr<PacedSender> paced_sender_;
};
TEST_F(PacedSenderTest, Basic) {
paced_sender_->UpdateBandwidthEstimate(clock_.Now(),
QuicBandwidth::FromKBytesPerSecond(kHundredKBytesPerS * 10));
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
paced_sender_->OnPacketSent(clock_.Now(), kDefaultMaxPacketSize);
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
paced_sender_->OnPacketSent(clock_.Now(), kDefaultMaxPacketSize);
EXPECT_EQ(static_cast<int64>(kDefaultMaxPacketSize * 2),
paced_sender_->TimeUntilSend(
clock_.Now(), zero_time_).ToMicroseconds());
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(24));
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
}
TEST_F(PacedSenderTest, LowRate) {
paced_sender_->UpdateBandwidthEstimate(clock_.Now(),
QuicBandwidth::FromKBytesPerSecond(kHundredKBytesPerS));
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
paced_sender_->OnPacketSent(clock_.Now(), kDefaultMaxPacketSize);
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
paced_sender_->OnPacketSent(clock_.Now(), kDefaultMaxPacketSize);
EXPECT_EQ(static_cast<int64>(kDefaultMaxPacketSize * 20),
paced_sender_->TimeUntilSend(
clock_.Now(), zero_time_).ToMicroseconds());
clock_.AdvanceTime(QuicTime::Delta::FromMilliseconds(24));
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
}
TEST_F(PacedSenderTest, HighRate) {
QuicBandwidth bandwidth_estimate = QuicBandwidth::FromKBytesPerSecond(
kHundredKBytesPerS * 100);
paced_sender_->UpdateBandwidthEstimate(clock_.Now(), bandwidth_estimate);
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
for (int i = 0; i < 16; ++i) {
paced_sender_->OnPacketSent(clock_.Now(), kDefaultMaxPacketSize);
EXPECT_TRUE(paced_sender_->TimeUntilSend(
clock_.Now(), zero_time_).IsZero());
}
paced_sender_->OnPacketSent(clock_.Now(), kDefaultMaxPacketSize);
EXPECT_EQ(2040, paced_sender_->TimeUntilSend(
clock_.Now(), zero_time_).ToMicroseconds());
clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(20400));
EXPECT_TRUE(paced_sender_->TimeUntilSend(clock_.Now(), zero_time_).IsZero());
}
} // namespace test
} // namespace net
|
