Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | #include "net/dcsctp/common/sequence_numbers.h" |
| 11 | |
| 12 | #include "test/gmock.h" |
| 13 | |
| 14 | namespace dcsctp { |
| 15 | namespace { |
| 16 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 17 | using Wrapped = StrongAlias<class WrappedTag, uint16_t>; |
| 18 | using TestSequence = UnwrappedSequenceNumber<Wrapped>; |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 19 | |
| 20 | TEST(SequenceNumbersTest, SimpleUnwrapping) { |
| 21 | TestSequence::Unwrapper unwrapper; |
| 22 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 23 | TestSequence s0 = unwrapper.Unwrap(Wrapped(0)); |
| 24 | TestSequence s1 = unwrapper.Unwrap(Wrapped(1)); |
| 25 | TestSequence s2 = unwrapper.Unwrap(Wrapped(2)); |
| 26 | TestSequence s3 = unwrapper.Unwrap(Wrapped(3)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 27 | |
| 28 | EXPECT_LT(s0, s1); |
| 29 | EXPECT_LT(s0, s2); |
| 30 | EXPECT_LT(s0, s3); |
| 31 | EXPECT_LT(s1, s2); |
| 32 | EXPECT_LT(s1, s3); |
| 33 | EXPECT_LT(s2, s3); |
| 34 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 35 | EXPECT_EQ(TestSequence::Difference(s1, s0), 1); |
| 36 | EXPECT_EQ(TestSequence::Difference(s2, s0), 2); |
| 37 | EXPECT_EQ(TestSequence::Difference(s3, s0), 3); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 38 | |
| 39 | EXPECT_GT(s1, s0); |
| 40 | EXPECT_GT(s2, s0); |
| 41 | EXPECT_GT(s3, s0); |
| 42 | EXPECT_GT(s2, s1); |
| 43 | EXPECT_GT(s3, s1); |
| 44 | EXPECT_GT(s3, s2); |
| 45 | |
| 46 | s0.Increment(); |
| 47 | EXPECT_EQ(s0, s1); |
| 48 | s1.Increment(); |
| 49 | EXPECT_EQ(s1, s2); |
| 50 | s2.Increment(); |
| 51 | EXPECT_EQ(s2, s3); |
| 52 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 53 | EXPECT_EQ(TestSequence::AddTo(s0, 2), s3); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | TEST(SequenceNumbersTest, MidValueUnwrapping) { |
| 57 | TestSequence::Unwrapper unwrapper; |
| 58 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 59 | TestSequence s0 = unwrapper.Unwrap(Wrapped(0x7FFE)); |
| 60 | TestSequence s1 = unwrapper.Unwrap(Wrapped(0x7FFF)); |
| 61 | TestSequence s2 = unwrapper.Unwrap(Wrapped(0x8000)); |
| 62 | TestSequence s3 = unwrapper.Unwrap(Wrapped(0x8001)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 63 | |
| 64 | EXPECT_LT(s0, s1); |
| 65 | EXPECT_LT(s0, s2); |
| 66 | EXPECT_LT(s0, s3); |
| 67 | EXPECT_LT(s1, s2); |
| 68 | EXPECT_LT(s1, s3); |
| 69 | EXPECT_LT(s2, s3); |
| 70 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 71 | EXPECT_EQ(TestSequence::Difference(s1, s0), 1); |
| 72 | EXPECT_EQ(TestSequence::Difference(s2, s0), 2); |
| 73 | EXPECT_EQ(TestSequence::Difference(s3, s0), 3); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 74 | |
| 75 | EXPECT_GT(s1, s0); |
| 76 | EXPECT_GT(s2, s0); |
| 77 | EXPECT_GT(s3, s0); |
| 78 | EXPECT_GT(s2, s1); |
| 79 | EXPECT_GT(s3, s1); |
| 80 | EXPECT_GT(s3, s2); |
| 81 | |
| 82 | s0.Increment(); |
| 83 | EXPECT_EQ(s0, s1); |
| 84 | s1.Increment(); |
| 85 | EXPECT_EQ(s1, s2); |
| 86 | s2.Increment(); |
| 87 | EXPECT_EQ(s2, s3); |
| 88 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 89 | EXPECT_EQ(TestSequence::AddTo(s0, 2), s3); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | TEST(SequenceNumbersTest, WrappedUnwrapping) { |
| 93 | TestSequence::Unwrapper unwrapper; |
| 94 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 95 | TestSequence s0 = unwrapper.Unwrap(Wrapped(0xFFFE)); |
| 96 | TestSequence s1 = unwrapper.Unwrap(Wrapped(0xFFFF)); |
| 97 | TestSequence s2 = unwrapper.Unwrap(Wrapped(0x0000)); |
| 98 | TestSequence s3 = unwrapper.Unwrap(Wrapped(0x0001)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 99 | |
| 100 | EXPECT_LT(s0, s1); |
| 101 | EXPECT_LT(s0, s2); |
| 102 | EXPECT_LT(s0, s3); |
| 103 | EXPECT_LT(s1, s2); |
| 104 | EXPECT_LT(s1, s3); |
| 105 | EXPECT_LT(s2, s3); |
| 106 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 107 | EXPECT_EQ(TestSequence::Difference(s1, s0), 1); |
| 108 | EXPECT_EQ(TestSequence::Difference(s2, s0), 2); |
| 109 | EXPECT_EQ(TestSequence::Difference(s3, s0), 3); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 110 | |
| 111 | EXPECT_GT(s1, s0); |
| 112 | EXPECT_GT(s2, s0); |
| 113 | EXPECT_GT(s3, s0); |
| 114 | EXPECT_GT(s2, s1); |
| 115 | EXPECT_GT(s3, s1); |
| 116 | EXPECT_GT(s3, s2); |
| 117 | |
| 118 | s0.Increment(); |
| 119 | EXPECT_EQ(s0, s1); |
| 120 | s1.Increment(); |
| 121 | EXPECT_EQ(s1, s2); |
| 122 | s2.Increment(); |
| 123 | EXPECT_EQ(s2, s3); |
| 124 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 125 | EXPECT_EQ(TestSequence::AddTo(s0, 2), s3); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | TEST(SequenceNumbersTest, WrapAroundAFewTimes) { |
| 129 | TestSequence::Unwrapper unwrapper; |
| 130 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 131 | TestSequence s0 = unwrapper.Unwrap(Wrapped(0)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 132 | TestSequence prev = s0; |
| 133 | |
| 134 | for (uint32_t i = 1; i < 65536 * 3; i++) { |
| 135 | uint16_t wrapped = static_cast<uint16_t>(i); |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 136 | TestSequence si = unwrapper.Unwrap(Wrapped(wrapped)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 137 | |
| 138 | EXPECT_LT(s0, si); |
| 139 | EXPECT_LT(prev, si); |
| 140 | prev = si; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | TEST(SequenceNumbersTest, IncrementIsSameAsWrapped) { |
| 145 | TestSequence::Unwrapper unwrapper; |
| 146 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 147 | TestSequence s0 = unwrapper.Unwrap(Wrapped(0)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 148 | |
| 149 | for (uint32_t i = 1; i < 65536 * 2; i++) { |
| 150 | uint16_t wrapped = static_cast<uint16_t>(i); |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 151 | TestSequence si = unwrapper.Unwrap(Wrapped(wrapped)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 152 | |
| 153 | s0.Increment(); |
| 154 | EXPECT_EQ(s0, si); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | TEST(SequenceNumbersTest, UnwrappingLargerNumberIsAlwaysLarger) { |
| 159 | TestSequence::Unwrapper unwrapper; |
| 160 | |
| 161 | for (uint32_t i = 1; i < 65536 * 2; i++) { |
| 162 | uint16_t wrapped = static_cast<uint16_t>(i); |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 163 | TestSequence si = unwrapper.Unwrap(Wrapped(wrapped)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 164 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 165 | EXPECT_GT(unwrapper.Unwrap(Wrapped(wrapped + 1)), si); |
| 166 | EXPECT_GT(unwrapper.Unwrap(Wrapped(wrapped + 5)), si); |
| 167 | EXPECT_GT(unwrapper.Unwrap(Wrapped(wrapped + 10)), si); |
| 168 | EXPECT_GT(unwrapper.Unwrap(Wrapped(wrapped + 100)), si); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 169 | } |
| 170 | } |
| 171 | |
| 172 | TEST(SequenceNumbersTest, UnwrappingSmallerNumberIsAlwaysSmaller) { |
| 173 | TestSequence::Unwrapper unwrapper; |
| 174 | |
| 175 | for (uint32_t i = 1; i < 65536 * 2; i++) { |
| 176 | uint16_t wrapped = static_cast<uint16_t>(i); |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 177 | TestSequence si = unwrapper.Unwrap(Wrapped(wrapped)); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 178 | |
Victor Boivie | 83c726f | 2021-04-01 22:18:48 | [diff] [blame] | 179 | EXPECT_LT(unwrapper.Unwrap(Wrapped(wrapped - 1)), si); |
| 180 | EXPECT_LT(unwrapper.Unwrap(Wrapped(wrapped - 5)), si); |
| 181 | EXPECT_LT(unwrapper.Unwrap(Wrapped(wrapped - 10)), si); |
| 182 | EXPECT_LT(unwrapper.Unwrap(Wrapped(wrapped - 100)), si); |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 183 | } |
| 184 | } |
| 185 | |
Victor Boivie | 250fbb3 | 2021-04-13 09:11:04 | [diff] [blame] | 186 | TEST(SequenceNumbersTest, DifferenceIsAbsolute) { |
| 187 | TestSequence::Unwrapper unwrapper; |
| 188 | |
| 189 | TestSequence this_value = unwrapper.Unwrap(Wrapped(10)); |
| 190 | TestSequence other_value = TestSequence::AddTo(this_value, 100); |
| 191 | |
| 192 | EXPECT_EQ(TestSequence::Difference(this_value, other_value), 100); |
| 193 | EXPECT_EQ(TestSequence::Difference(other_value, this_value), 100); |
| 194 | |
| 195 | TestSequence minus_value = TestSequence::AddTo(this_value, -100); |
| 196 | |
| 197 | EXPECT_EQ(TestSequence::Difference(this_value, minus_value), 100); |
| 198 | EXPECT_EQ(TestSequence::Difference(minus_value, this_value), 100); |
| 199 | } |
| 200 | |
Victor Boivie | a4d5e24 | 2021-03-30 08:03:51 | [diff] [blame] | 201 | } // namespace |
| 202 | } // namespace dcsctp |