Jakub Czapiga | 0b6b968 | 2021-02-24 16:33:21 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <tests/test.h> |
| 4 | #include <crc_byte.h> |
| 5 | |
| 6 | static const uint8_t test_data_u8[] = { |
| 7 | 0x2f, 0x8f, 0x2d, 0x06, 0xc2, 0x11, 0x0c, 0xaf, |
| 8 | 0xd7, 0x4b, 0x48, 0x71, 0xce, 0x3c, 0xfe, 0x29, |
| 9 | 0x90, 0xf6, 0x33, 0x6d, 0x79, 0x23, 0x9d, 0x84, |
| 10 | 0x58, 0x5c, 0xcc, 0xf1, 0xa1, 0xf2, 0x39, 0x22, |
| 11 | 0xdc, 0x63, 0xe0, 0x44, 0x0a, 0x95, 0x36, 0xee, |
| 12 | 0x53, 0xb3, 0x61, 0x2c, 0x4a, 0xf4, 0x8b, 0x32, |
| 13 | 0xeb, 0x94, 0x86, 0x55, 0x41, 0x27, 0xa4, 0xbd, |
| 14 | 0x0f, 0xc1, 0x4f, 0xfb, 0xb6, 0xa3, 0xc5, 0x38, |
| 15 | 0x99, 0xfc, 0xca, 0xf8, 0x8e, 0x72, 0xaa, 0xed, |
| 16 | 0x6b, 0xb2, 0xd3, 0xd4, 0xd6, 0x81, 0x7d, 0x24, |
| 17 | 0x56, 0x9f, 0x7a, 0x21, 0x67, 0xac, 0x6a, 0x98, |
| 18 | 0xf7, 0xd1, 0xad, 0x01, 0xdb, 0xc6, 0x80, 0x34, |
| 19 | 0x8d, 0x51, 0x60, 0x3e, 0xd2, 0x52, 0x0e, 0x26, |
| 20 | 0x12, 0xb1, 0x13, 0xa2, 0x88, 0x04, 0x66, 0xb0, |
| 21 | 0x3b, 0xc8, 0x1b, 0x7f, 0x92, 0x4e, 0xb8, 0xe9, |
| 22 | 0x70, 0xe3, 0xfa, 0x76, 0x3a, 0xa7, 0x4c, 0x25, |
| 23 | 0x91, 0x54, 0x19, 0xea, 0x50, 0x37, 0xd8, 0xb4, |
| 24 | 0x47, 0x49, 0xbf, 0xc4, 0xb7, 0xd0, 0x93, 0xda, |
| 25 | 0x6c, 0x03, 0x9b, 0x15, 0xbb, 0xfd, 0xe7, 0xdd, |
| 26 | 0x2e, 0x31, 0x68, 0x46, 0xa0, 0x43, 0xcd, 0x08, |
| 27 | 0x8c, 0xff, 0x40, 0xcf, 0x1a, 0x7c, 0x69, 0x59, |
| 28 | 0xc0, 0x5b, 0x83, 0x17, 0x10, 0x14, 0x9e, 0x1d, |
| 29 | 0xc3, 0xa6, 0x5f, 0x4d, 0x9c, 0xa5, 0x73, 0x77, |
| 30 | 0x87, 0x96, 0x65, 0x0b, 0xec, 0xc7, 0xd9, 0x85, |
| 31 | 0x1c, 0xae, 0x18, 0x5e, 0x09, 0x78, 0x2b, 0x82, |
| 32 | 0x1f, 0xe6, 0xc9, 0x64, 0x6f, 0x20, 0x16, 0x57, |
| 33 | 0x9a, 0xbe, 0xd5, 0xe2, 0x89, 0x3f, 0xdf, 0xe4, |
| 34 | 0x7e, 0xde, 0x30, 0xa9, 0x74, 0xe5, 0xab, 0x07, |
| 35 | 0x35, 0x5d, 0x2a, 0x28, 0xcb, 0xf0, 0x8a, 0xef, |
| 36 | 0x5a, 0xe1, 0x75, 0x42, 0xf9, 0xba, 0x02, 0xbc, |
| 37 | 0xf5, 0x45, 0x05, 0x0d, 0x3d, 0x62, 0xb9, 0x00, |
| 38 | 0x7b, 0x1e, 0xe8, 0xb5, 0x97, 0x6e, 0xa8, 0xf3, |
| 39 | }; |
| 40 | static const size_t test_data_u8_sz = ARRAY_SIZE(test_data_u8); |
| 41 | static const uint8_t test_data_crc7_checksum = 0x30; |
| 42 | static const uint16_t test_data_crc16_checksum = 0x63; |
| 43 | static const uint32_t test_data_crc32_checksum = 0x93; |
| 44 | |
| 45 | static void test_crc7_byte_zeros(void **state) |
| 46 | { |
| 47 | uint8_t crc_value = 0u; |
| 48 | |
| 49 | /* Expect zero as crc value after calculating it for single zero byte */ |
| 50 | crc_value = crc7_byte(crc_value, 0); |
| 51 | assert_int_equal(0, crc_value); |
| 52 | |
| 53 | /* Expect zero crc for zero-byte stream */ |
| 54 | for (size_t i = 0; i < 3000; ++i) { |
| 55 | crc_value = crc7_byte(crc_value, 0); |
| 56 | assert_int_equal(0, crc_value); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static void test_crc7_byte_same_byte_twice_different_value(void **state) |
| 61 | { |
| 62 | uint8_t crc_value = 0u; |
| 63 | |
| 64 | /* Expect value to change after feeding crc function with the same byte twice. */ |
| 65 | crc_value = crc7_byte(crc_value, 0xAD); |
| 66 | assert_int_equal(0x2C, crc_value); |
| 67 | |
| 68 | crc_value = crc7_byte(crc_value, 0xAD); |
| 69 | assert_int_equal(0x90, crc_value); |
| 70 | } |
| 71 | |
| 72 | static void test_crc7_byte_repeat_stream(void **state) |
| 73 | { |
| 74 | uint8_t crc_value_1 = 0u; |
| 75 | uint8_t crc_value_2 = 0u; |
| 76 | const size_t iterations = 25600; |
| 77 | |
| 78 | /* Calculate CRC7 twice for the same data and expect the same result. |
| 79 | Ensure deterministic and repeatable behavior. */ |
| 80 | for (size_t i = 0; i < iterations; i++) { |
| 81 | const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); |
| 82 | crc_value_1 = crc7_byte(crc_value_1, value); |
| 83 | } |
| 84 | |
| 85 | for (size_t i = 0; i < iterations; i++) { |
| 86 | const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); |
| 87 | crc_value_2 = crc7_byte(crc_value_2, value); |
| 88 | } |
| 89 | |
| 90 | assert_int_equal(crc_value_1, crc_value_2); |
| 91 | } |
| 92 | |
| 93 | static void test_crc7_byte_single_bit_difference(void **state) |
| 94 | { |
| 95 | uint8_t crc_value_1 = 0u; |
| 96 | uint8_t crc_value_2 = 0u; |
| 97 | |
| 98 | for (size_t i = 0; i < 1000; ++i) { |
| 99 | crc_value_1 = crc7_byte(crc_value_1, (i % 128) << 1); |
| 100 | crc_value_2 = crc7_byte(crc_value_2, (i % 128) << 1); |
| 101 | } |
| 102 | crc_value_1 = crc7_byte(crc_value_1, 0xF0); |
| 103 | crc_value_2 = crc7_byte(crc_value_2, 0xF1); |
| 104 | |
| 105 | /* Expect different CRC values for byte streams differing by one bit. */ |
| 106 | assert_int_not_equal(crc_value_1, crc_value_2); |
| 107 | } |
| 108 | |
| 109 | static void test_crc7_byte_static_data(void **state) |
| 110 | { |
| 111 | uint8_t crc_value = CRC(test_data_u8, test_data_u8_sz, crc7_byte); |
| 112 | |
| 113 | assert_int_equal(test_data_crc7_checksum, crc_value); |
| 114 | |
| 115 | /* Calculating CRC of data with its CRC should yield zero if data |
| 116 | and/or checksum is correct */ |
| 117 | assert_int_equal(0, crc7_byte(crc_value, test_data_crc7_checksum)); |
| 118 | } |
| 119 | |
| 120 | static void test_crc16_byte_zeros(void **state) |
| 121 | { |
| 122 | uint16_t crc_value = 0u; |
| 123 | |
| 124 | /* Expect zero as crc value after calculating it for single zero byte */ |
| 125 | crc_value = crc16_byte(crc_value, 0); |
| 126 | assert_int_equal(0, crc_value); |
| 127 | |
| 128 | /* Expect zero crc for zero-byte stream */ |
| 129 | for (size_t i = 0; i < 3000; ++i) { |
| 130 | crc_value = crc16_byte(crc_value, 0); |
| 131 | assert_int_equal(0, crc_value); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | static void test_crc16_same_data_twice_different_value(void **state) |
| 136 | { |
| 137 | uint16_t crc_value = 0u; |
| 138 | |
| 139 | /* Expect value to change after feeding crc function with the same byte twice. */ |
| 140 | crc_value = crc16_byte(crc_value, 0xDF); |
| 141 | assert_int_equal(0x3a92, crc_value); |
| 142 | |
| 143 | crc_value = crc16_byte(crc_value, 0xDF); |
| 144 | assert_int_equal(0x3f8b, crc_value); |
| 145 | } |
| 146 | |
| 147 | static void test_crc16_byte_repeat_stream(void **state) |
| 148 | { |
| 149 | uint8_t crc_value_1 = 0u; |
| 150 | uint8_t crc_value_2 = 0u; |
| 151 | const size_t iterations = 17777; |
| 152 | |
| 153 | /* Calculate CRC16 twice for the same data and expect the same result. |
| 154 | Ensure deterministic and repeatable behavior. */ |
| 155 | for (size_t i = 0; i < iterations; i++) { |
| 156 | const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); |
| 157 | crc_value_1 = crc16_byte(crc_value_1, value); |
| 158 | } |
| 159 | |
| 160 | for (size_t i = 0; i < iterations; i++) { |
| 161 | const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); |
| 162 | crc_value_2 = crc16_byte(crc_value_2, value); |
| 163 | } |
| 164 | |
| 165 | assert_int_equal(crc_value_1, crc_value_2); |
| 166 | } |
| 167 | |
| 168 | static void test_crc16_byte_single_bit_difference(void **state) |
| 169 | { |
| 170 | uint8_t crc_value_1 = 0u; |
| 171 | uint8_t crc_value_2 = 0u; |
| 172 | |
| 173 | for (size_t i = 0; i < 2000; ++i) { |
| 174 | crc_value_1 = crc16_byte(crc_value_1, (i % 128) << 1); |
| 175 | crc_value_2 = crc16_byte(crc_value_2, (i % 128) << 1); |
| 176 | } |
| 177 | crc_value_1 = crc16_byte(crc_value_1, 0x1A); |
| 178 | crc_value_2 = crc16_byte(crc_value_2, 0x0A); |
| 179 | |
| 180 | /* Expect different CRC values for byte streams differing by one bit. */ |
| 181 | assert_int_not_equal(crc_value_1, crc_value_2); |
| 182 | } |
| 183 | |
| 184 | static void test_crc16_byte_static_data(void **state) |
| 185 | { |
| 186 | uint8_t crc_value = CRC(test_data_u8, test_data_u8_sz, crc16_byte); |
| 187 | |
| 188 | assert_int_equal(test_data_crc16_checksum, crc_value); |
| 189 | |
| 190 | /* Calculating CRC of data with its CRC should yield zero if data |
| 191 | and/or checksum is correct */ |
| 192 | assert_int_equal(0, |
| 193 | crc16_byte(crc16_byte(crc_value, test_data_crc16_checksum >> 8), |
| 194 | test_data_crc16_checksum & 0xFF)); |
| 195 | } |
| 196 | |
| 197 | static void test_crc32_byte_zeros(void **state) |
| 198 | { |
| 199 | uint16_t crc_value = 0u; |
| 200 | |
| 201 | /* Expect zero as crc value after calculating it for single zero byte */ |
| 202 | crc_value = crc32_byte(crc_value, 0); |
| 203 | assert_int_equal(0, crc_value); |
| 204 | |
| 205 | /* Expect zero crc for zero-byte stream */ |
| 206 | for (size_t i = 0; i < 1553; ++i) { |
| 207 | crc_value = crc32_byte(crc_value, 0); |
| 208 | assert_int_equal(0, crc_value); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static void test_crc32_same_data_twice_different_value(void **state) |
| 213 | { |
| 214 | uint16_t crc_value = 0u; |
| 215 | |
| 216 | /* Expect value to change after feeding crc function with the same byte twice. */ |
| 217 | crc_value = crc32_byte(crc_value, 0xDF); |
| 218 | assert_int_equal(0xf654, crc_value); |
| 219 | |
| 220 | crc_value = crc32_byte(crc_value, 0xDF); |
| 221 | assert_int_equal(0xa254, crc_value); |
| 222 | } |
| 223 | |
| 224 | static void test_crc32_byte_repeat_stream(void **state) |
| 225 | { |
| 226 | uint8_t crc_value_1 = 0u; |
| 227 | uint8_t crc_value_2 = 0u; |
| 228 | const size_t iterations = 8935; |
| 229 | |
| 230 | /* Calculate CRC16 twice for the same data and expect the same result. |
| 231 | Ensure deterministic and repeatable behavior. */ |
| 232 | for (size_t i = 0; i < iterations; i++) { |
| 233 | const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); |
| 234 | crc_value_1 = crc32_byte(crc_value_1, value); |
| 235 | } |
| 236 | |
| 237 | for (size_t i = 0; i < iterations; i++) { |
| 238 | const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); |
| 239 | crc_value_2 = crc32_byte(crc_value_2, value); |
| 240 | } |
| 241 | |
| 242 | assert_int_equal(crc_value_1, crc_value_2); |
| 243 | } |
| 244 | |
| 245 | static void test_crc32_byte_single_bit_difference(void **state) |
| 246 | { |
| 247 | uint8_t crc_value_1 = 0u; |
| 248 | uint8_t crc_value_2 = 0u; |
| 249 | |
| 250 | for (size_t i = 0; i < 1338; ++i) { |
| 251 | crc_value_1 = crc32_byte(crc_value_1, (i % 128) << 1); |
| 252 | crc_value_2 = crc32_byte(crc_value_2, (i % 128) << 1); |
| 253 | } |
| 254 | crc_value_1 = crc32_byte(crc_value_1, 0x33); |
| 255 | crc_value_2 = crc32_byte(crc_value_2, 0x32); |
| 256 | |
| 257 | /* Expect different CRC values for byte streams differing by one bit. */ |
| 258 | assert_int_not_equal(crc_value_1, crc_value_2); |
| 259 | } |
| 260 | |
| 261 | static void test_crc32_byte_static_data(void **state) |
| 262 | { |
| 263 | uint8_t crc_value = CRC(test_data_u8, test_data_u8_sz, crc32_byte); |
| 264 | |
| 265 | assert_int_equal(test_data_crc32_checksum, crc_value); |
| 266 | |
| 267 | /* Calculating CRC of data with its CRC should yield zero if data |
| 268 | and/or checksum is correct */ |
| 269 | for (int i = 0; i < 4; ++i) |
| 270 | crc_value = crc32_byte(crc_value, (test_data_crc32_checksum >> 8 * i) & 0xFF); |
| 271 | assert_int_equal(0, crc_value); |
| 272 | } |
| 273 | |
| 274 | int main(void) |
| 275 | { |
| 276 | const struct CMUnitTest tests[] = { |
| 277 | cmocka_unit_test(test_crc7_byte_zeros), |
| 278 | cmocka_unit_test(test_crc7_byte_same_byte_twice_different_value), |
| 279 | cmocka_unit_test(test_crc7_byte_repeat_stream), |
| 280 | cmocka_unit_test(test_crc7_byte_single_bit_difference), |
| 281 | cmocka_unit_test(test_crc7_byte_static_data), |
| 282 | |
| 283 | cmocka_unit_test(test_crc16_byte_zeros), |
| 284 | cmocka_unit_test(test_crc16_same_data_twice_different_value), |
| 285 | cmocka_unit_test(test_crc16_byte_repeat_stream), |
| 286 | cmocka_unit_test(test_crc16_byte_single_bit_difference), |
| 287 | cmocka_unit_test(test_crc16_byte_static_data), |
| 288 | |
| 289 | cmocka_unit_test(test_crc32_byte_zeros), |
| 290 | cmocka_unit_test(test_crc32_same_data_twice_different_value), |
| 291 | cmocka_unit_test(test_crc32_byte_repeat_stream), |
| 292 | cmocka_unit_test(test_crc32_byte_single_bit_difference), |
| 293 | cmocka_unit_test(test_crc32_byte_static_data), |
| 294 | }; |
| 295 | |
| 296 | return cmocka_run_group_tests(tests, NULL, NULL); |
| 297 | } |