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
3 // found in the LICENSE file.
4
5 #include "quiche/quic/core/quic_bandwidth.h"
6
7 #include <limits>
8
9 #include "quiche/quic/core/quic_time.h"
10 #include "quiche/quic/platform/api/quic_test.h"
11
12 namespace quic {
13 namespace test {
14
15 class QuicBandwidthTest : public QuicTest {};
16
TEST_F(QuicBandwidthTest,FromTo)17 TEST_F(QuicBandwidthTest, FromTo) {
18 EXPECT_EQ(QuicBandwidth::FromKBitsPerSecond(1),
19 QuicBandwidth::FromBitsPerSecond(1000));
20 EXPECT_EQ(QuicBandwidth::FromKBytesPerSecond(1),
21 QuicBandwidth::FromBytesPerSecond(1000));
22 EXPECT_EQ(QuicBandwidth::FromBitsPerSecond(8000),
23 QuicBandwidth::FromBytesPerSecond(1000));
24 EXPECT_EQ(QuicBandwidth::FromKBitsPerSecond(8),
25 QuicBandwidth::FromKBytesPerSecond(1));
26
27 EXPECT_EQ(0, QuicBandwidth::Zero().ToBitsPerSecond());
28 EXPECT_EQ(0, QuicBandwidth::Zero().ToKBitsPerSecond());
29 EXPECT_EQ(0, QuicBandwidth::Zero().ToBytesPerSecond());
30 EXPECT_EQ(0, QuicBandwidth::Zero().ToKBytesPerSecond());
31
32 EXPECT_EQ(1, QuicBandwidth::FromBitsPerSecond(1000).ToKBitsPerSecond());
33 EXPECT_EQ(1000, QuicBandwidth::FromKBitsPerSecond(1).ToBitsPerSecond());
34 EXPECT_EQ(1, QuicBandwidth::FromBytesPerSecond(1000).ToKBytesPerSecond());
35 EXPECT_EQ(1000, QuicBandwidth::FromKBytesPerSecond(1).ToBytesPerSecond());
36 }
37
TEST_F(QuicBandwidthTest,Add)38 TEST_F(QuicBandwidthTest, Add) {
39 QuicBandwidth bandwidht_1 = QuicBandwidth::FromKBitsPerSecond(1);
40 QuicBandwidth bandwidht_2 = QuicBandwidth::FromKBytesPerSecond(1);
41
42 EXPECT_EQ(9000, (bandwidht_1 + bandwidht_2).ToBitsPerSecond());
43 EXPECT_EQ(9000, (bandwidht_2 + bandwidht_1).ToBitsPerSecond());
44 }
45
TEST_F(QuicBandwidthTest,Subtract)46 TEST_F(QuicBandwidthTest, Subtract) {
47 QuicBandwidth bandwidht_1 = QuicBandwidth::FromKBitsPerSecond(1);
48 QuicBandwidth bandwidht_2 = QuicBandwidth::FromKBytesPerSecond(1);
49
50 EXPECT_EQ(7000, (bandwidht_2 - bandwidht_1).ToBitsPerSecond());
51 }
52
TEST_F(QuicBandwidthTest,TimeDelta)53 TEST_F(QuicBandwidthTest, TimeDelta) {
54 EXPECT_EQ(QuicBandwidth::FromKBytesPerSecond(1000),
55 QuicBandwidth::FromBytesAndTimeDelta(
56 1000, QuicTime::Delta::FromMilliseconds(1)));
57
58 EXPECT_EQ(QuicBandwidth::FromKBytesPerSecond(10),
59 QuicBandwidth::FromBytesAndTimeDelta(
60 1000, QuicTime::Delta::FromMilliseconds(100)));
61
62 EXPECT_EQ(QuicBandwidth::Zero(), QuicBandwidth::FromBytesAndTimeDelta(
63 0, QuicTime::Delta::FromSeconds(9)));
64
65 EXPECT_EQ(
66 QuicBandwidth::FromBitsPerSecond(1),
67 QuicBandwidth::FromBytesAndTimeDelta(1, QuicTime::Delta::FromSeconds(9)));
68 }
69
TEST_F(QuicBandwidthTest,Scale)70 TEST_F(QuicBandwidthTest, Scale) {
71 EXPECT_EQ(QuicBandwidth::FromKBytesPerSecond(500),
72 QuicBandwidth::FromKBytesPerSecond(1000) * 0.5f);
73 EXPECT_EQ(QuicBandwidth::FromKBytesPerSecond(750),
74 0.75f * QuicBandwidth::FromKBytesPerSecond(1000));
75 EXPECT_EQ(QuicBandwidth::FromKBytesPerSecond(1250),
76 QuicBandwidth::FromKBytesPerSecond(1000) * 1.25f);
77
78 // Ensure we are rounding correctly within a 1bps level of precision.
79 EXPECT_EQ(QuicBandwidth::FromBitsPerSecond(5),
80 QuicBandwidth::FromBitsPerSecond(9) * 0.5f);
81 EXPECT_EQ(QuicBandwidth::FromBitsPerSecond(2),
82 QuicBandwidth::FromBitsPerSecond(12) * 0.2f);
83 }
84
TEST_F(QuicBandwidthTest,BytesPerPeriod)85 TEST_F(QuicBandwidthTest, BytesPerPeriod) {
86 EXPECT_EQ(2000, QuicBandwidth::FromKBytesPerSecond(2000).ToBytesPerPeriod(
87 QuicTime::Delta::FromMilliseconds(1)));
88 EXPECT_EQ(2, QuicBandwidth::FromKBytesPerSecond(2000).ToKBytesPerPeriod(
89 QuicTime::Delta::FromMilliseconds(1)));
90 EXPECT_EQ(200000, QuicBandwidth::FromKBytesPerSecond(2000).ToBytesPerPeriod(
91 QuicTime::Delta::FromMilliseconds(100)));
92 EXPECT_EQ(200, QuicBandwidth::FromKBytesPerSecond(2000).ToKBytesPerPeriod(
93 QuicTime::Delta::FromMilliseconds(100)));
94
95 // 1599 * 1001 = 1600599 bits/ms = 200.074875 bytes/s.
96 EXPECT_EQ(200, QuicBandwidth::FromBitsPerSecond(1599).ToBytesPerPeriod(
97 QuicTime::Delta::FromMilliseconds(1001)));
98
99 EXPECT_EQ(200, QuicBandwidth::FromBitsPerSecond(1599).ToKBytesPerPeriod(
100 QuicTime::Delta::FromSeconds(1001)));
101 }
102
TEST_F(QuicBandwidthTest,TransferTime)103 TEST_F(QuicBandwidthTest, TransferTime) {
104 EXPECT_EQ(QuicTime::Delta::FromSeconds(1),
105 QuicBandwidth::FromKBytesPerSecond(1).TransferTime(1000));
106 EXPECT_EQ(QuicTime::Delta::Zero(), QuicBandwidth::Zero().TransferTime(1000));
107 }
108
TEST_F(QuicBandwidthTest,RelOps)109 TEST_F(QuicBandwidthTest, RelOps) {
110 const QuicBandwidth b1 = QuicBandwidth::FromKBitsPerSecond(1);
111 const QuicBandwidth b2 = QuicBandwidth::FromKBytesPerSecond(2);
112 EXPECT_EQ(b1, b1);
113 EXPECT_NE(b1, b2);
114 EXPECT_LT(b1, b2);
115 EXPECT_GT(b2, b1);
116 EXPECT_LE(b1, b1);
117 EXPECT_LE(b1, b2);
118 EXPECT_GE(b1, b1);
119 EXPECT_GE(b2, b1);
120 }
121
TEST_F(QuicBandwidthTest,DebuggingValue)122 TEST_F(QuicBandwidthTest, DebuggingValue) {
123 EXPECT_EQ("128 bits/s (16 bytes/s)",
124 QuicBandwidth::FromBytesPerSecond(16).ToDebuggingValue());
125 EXPECT_EQ("4096 bits/s (512 bytes/s)",
126 QuicBandwidth::FromBytesPerSecond(512).ToDebuggingValue());
127
128 QuicBandwidth bandwidth = QuicBandwidth::FromBytesPerSecond(1000 * 50);
129 EXPECT_EQ("400.00 kbits/s (50.00 kbytes/s)", bandwidth.ToDebuggingValue());
130
131 bandwidth = bandwidth * 1000;
132 EXPECT_EQ("400.00 Mbits/s (50.00 Mbytes/s)", bandwidth.ToDebuggingValue());
133
134 bandwidth = bandwidth * 1000;
135 EXPECT_EQ("400.00 Gbits/s (50.00 Gbytes/s)", bandwidth.ToDebuggingValue());
136 }
137
TEST_F(QuicBandwidthTest,SpecialValues)138 TEST_F(QuicBandwidthTest, SpecialValues) {
139 EXPECT_EQ(0, QuicBandwidth::Zero().ToBitsPerSecond());
140 EXPECT_EQ(std::numeric_limits<int64_t>::max(),
141 QuicBandwidth::Infinite().ToBitsPerSecond());
142
143 EXPECT_TRUE(QuicBandwidth::Zero().IsZero());
144 EXPECT_FALSE(QuicBandwidth::Zero().IsInfinite());
145
146 EXPECT_TRUE(QuicBandwidth::Infinite().IsInfinite());
147 EXPECT_FALSE(QuicBandwidth::Infinite().IsZero());
148 }
149
150 } // namespace test
151 } // namespace quic
152