Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/51088 )
Change subject: tests: Add lib/crc_byte-test test case ......................................................................
tests: Add lib/crc_byte-test test case
Signed-off-by: Jakub Czapiga jacz@semihalf.com Change-Id: I9016cd7825cb681fd200b23dd362ca24acf69192 Reviewed-on: https://review.coreboot.org/c/coreboot/+/51088 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Paul Fagerburg pfagerburg@chromium.org --- M tests/lib/Makefile.inc A tests/lib/crc_byte-test.c 2 files changed, 301 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Paul Fagerburg: Looks good to me, approved
diff --git a/tests/lib/Makefile.inc b/tests/lib/Makefile.inc index 0f978e7..2d49ba3 100644 --- a/tests/lib/Makefile.inc +++ b/tests/lib/Makefile.inc @@ -20,6 +20,7 @@ tests-y += memcpy-test tests-y += malloc-test tests-y += memmove-test +tests-y += crc_byte-test
string-test-srcs += tests/lib/string-test.c string-test-srcs += src/lib/string.c @@ -98,3 +99,6 @@
memmove-test-srcs += tests/lib/memmove-test.c
+crc_byte-test-srcs += tests/lib/crc_byte-test.c +crc_byte-test-srcs += src/lib/crc_byte.c + diff --git a/tests/lib/crc_byte-test.c b/tests/lib/crc_byte-test.c new file mode 100644 index 0000000..d7c9e10 --- /dev/null +++ b/tests/lib/crc_byte-test.c @@ -0,0 +1,297 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <tests/test.h> +#include <crc_byte.h> + +static const uint8_t test_data_u8[] = { + 0x2f, 0x8f, 0x2d, 0x06, 0xc2, 0x11, 0x0c, 0xaf, + 0xd7, 0x4b, 0x48, 0x71, 0xce, 0x3c, 0xfe, 0x29, + 0x90, 0xf6, 0x33, 0x6d, 0x79, 0x23, 0x9d, 0x84, + 0x58, 0x5c, 0xcc, 0xf1, 0xa1, 0xf2, 0x39, 0x22, + 0xdc, 0x63, 0xe0, 0x44, 0x0a, 0x95, 0x36, 0xee, + 0x53, 0xb3, 0x61, 0x2c, 0x4a, 0xf4, 0x8b, 0x32, + 0xeb, 0x94, 0x86, 0x55, 0x41, 0x27, 0xa4, 0xbd, + 0x0f, 0xc1, 0x4f, 0xfb, 0xb6, 0xa3, 0xc5, 0x38, + 0x99, 0xfc, 0xca, 0xf8, 0x8e, 0x72, 0xaa, 0xed, + 0x6b, 0xb2, 0xd3, 0xd4, 0xd6, 0x81, 0x7d, 0x24, + 0x56, 0x9f, 0x7a, 0x21, 0x67, 0xac, 0x6a, 0x98, + 0xf7, 0xd1, 0xad, 0x01, 0xdb, 0xc6, 0x80, 0x34, + 0x8d, 0x51, 0x60, 0x3e, 0xd2, 0x52, 0x0e, 0x26, + 0x12, 0xb1, 0x13, 0xa2, 0x88, 0x04, 0x66, 0xb0, + 0x3b, 0xc8, 0x1b, 0x7f, 0x92, 0x4e, 0xb8, 0xe9, + 0x70, 0xe3, 0xfa, 0x76, 0x3a, 0xa7, 0x4c, 0x25, + 0x91, 0x54, 0x19, 0xea, 0x50, 0x37, 0xd8, 0xb4, + 0x47, 0x49, 0xbf, 0xc4, 0xb7, 0xd0, 0x93, 0xda, + 0x6c, 0x03, 0x9b, 0x15, 0xbb, 0xfd, 0xe7, 0xdd, + 0x2e, 0x31, 0x68, 0x46, 0xa0, 0x43, 0xcd, 0x08, + 0x8c, 0xff, 0x40, 0xcf, 0x1a, 0x7c, 0x69, 0x59, + 0xc0, 0x5b, 0x83, 0x17, 0x10, 0x14, 0x9e, 0x1d, + 0xc3, 0xa6, 0x5f, 0x4d, 0x9c, 0xa5, 0x73, 0x77, + 0x87, 0x96, 0x65, 0x0b, 0xec, 0xc7, 0xd9, 0x85, + 0x1c, 0xae, 0x18, 0x5e, 0x09, 0x78, 0x2b, 0x82, + 0x1f, 0xe6, 0xc9, 0x64, 0x6f, 0x20, 0x16, 0x57, + 0x9a, 0xbe, 0xd5, 0xe2, 0x89, 0x3f, 0xdf, 0xe4, + 0x7e, 0xde, 0x30, 0xa9, 0x74, 0xe5, 0xab, 0x07, + 0x35, 0x5d, 0x2a, 0x28, 0xcb, 0xf0, 0x8a, 0xef, + 0x5a, 0xe1, 0x75, 0x42, 0xf9, 0xba, 0x02, 0xbc, + 0xf5, 0x45, 0x05, 0x0d, 0x3d, 0x62, 0xb9, 0x00, + 0x7b, 0x1e, 0xe8, 0xb5, 0x97, 0x6e, 0xa8, 0xf3, +}; +static const size_t test_data_u8_sz = ARRAY_SIZE(test_data_u8); +static const uint8_t test_data_crc7_checksum = 0x30; +static const uint16_t test_data_crc16_checksum = 0x63; +static const uint32_t test_data_crc32_checksum = 0x93; + +static void test_crc7_byte_zeros(void **state) +{ + uint8_t crc_value = 0u; + + /* Expect zero as crc value after calculating it for single zero byte */ + crc_value = crc7_byte(crc_value, 0); + assert_int_equal(0, crc_value); + + /* Expect zero crc for zero-byte stream */ + for (size_t i = 0; i < 3000; ++i) { + crc_value = crc7_byte(crc_value, 0); + assert_int_equal(0, crc_value); + } +} + +static void test_crc7_byte_same_byte_twice_different_value(void **state) +{ + uint8_t crc_value = 0u; + + /* Expect value to change after feeding crc function with the same byte twice. */ + crc_value = crc7_byte(crc_value, 0xAD); + assert_int_equal(0x2C, crc_value); + + crc_value = crc7_byte(crc_value, 0xAD); + assert_int_equal(0x90, crc_value); +} + +static void test_crc7_byte_repeat_stream(void **state) +{ + uint8_t crc_value_1 = 0u; + uint8_t crc_value_2 = 0u; + const size_t iterations = 25600; + + /* Calculate CRC7 twice for the same data and expect the same result. + Ensure deterministic and repeatable behavior. */ + for (size_t i = 0; i < iterations; i++) { + const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); + crc_value_1 = crc7_byte(crc_value_1, value); + } + + for (size_t i = 0; i < iterations; i++) { + const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); + crc_value_2 = crc7_byte(crc_value_2, value); + } + + assert_int_equal(crc_value_1, crc_value_2); +} + +static void test_crc7_byte_single_bit_difference(void **state) +{ + uint8_t crc_value_1 = 0u; + uint8_t crc_value_2 = 0u; + + for (size_t i = 0; i < 1000; ++i) { + crc_value_1 = crc7_byte(crc_value_1, (i % 128) << 1); + crc_value_2 = crc7_byte(crc_value_2, (i % 128) << 1); + } + crc_value_1 = crc7_byte(crc_value_1, 0xF0); + crc_value_2 = crc7_byte(crc_value_2, 0xF1); + + /* Expect different CRC values for byte streams differing by one bit. */ + assert_int_not_equal(crc_value_1, crc_value_2); +} + +static void test_crc7_byte_static_data(void **state) +{ + uint8_t crc_value = CRC(test_data_u8, test_data_u8_sz, crc7_byte); + + assert_int_equal(test_data_crc7_checksum, crc_value); + + /* Calculating CRC of data with its CRC should yield zero if data + and/or checksum is correct */ + assert_int_equal(0, crc7_byte(crc_value, test_data_crc7_checksum)); +} + +static void test_crc16_byte_zeros(void **state) +{ + uint16_t crc_value = 0u; + + /* Expect zero as crc value after calculating it for single zero byte */ + crc_value = crc16_byte(crc_value, 0); + assert_int_equal(0, crc_value); + + /* Expect zero crc for zero-byte stream */ + for (size_t i = 0; i < 3000; ++i) { + crc_value = crc16_byte(crc_value, 0); + assert_int_equal(0, crc_value); + } +} + +static void test_crc16_same_data_twice_different_value(void **state) +{ + uint16_t crc_value = 0u; + + /* Expect value to change after feeding crc function with the same byte twice. */ + crc_value = crc16_byte(crc_value, 0xDF); + assert_int_equal(0x3a92, crc_value); + + crc_value = crc16_byte(crc_value, 0xDF); + assert_int_equal(0x3f8b, crc_value); +} + +static void test_crc16_byte_repeat_stream(void **state) +{ + uint8_t crc_value_1 = 0u; + uint8_t crc_value_2 = 0u; + const size_t iterations = 17777; + + /* Calculate CRC16 twice for the same data and expect the same result. + Ensure deterministic and repeatable behavior. */ + for (size_t i = 0; i < iterations; i++) { + const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); + crc_value_1 = crc16_byte(crc_value_1, value); + } + + for (size_t i = 0; i < iterations; i++) { + const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); + crc_value_2 = crc16_byte(crc_value_2, value); + } + + assert_int_equal(crc_value_1, crc_value_2); +} + +static void test_crc16_byte_single_bit_difference(void **state) +{ + uint8_t crc_value_1 = 0u; + uint8_t crc_value_2 = 0u; + + for (size_t i = 0; i < 2000; ++i) { + crc_value_1 = crc16_byte(crc_value_1, (i % 128) << 1); + crc_value_2 = crc16_byte(crc_value_2, (i % 128) << 1); + } + crc_value_1 = crc16_byte(crc_value_1, 0x1A); + crc_value_2 = crc16_byte(crc_value_2, 0x0A); + + /* Expect different CRC values for byte streams differing by one bit. */ + assert_int_not_equal(crc_value_1, crc_value_2); +} + +static void test_crc16_byte_static_data(void **state) +{ + uint8_t crc_value = CRC(test_data_u8, test_data_u8_sz, crc16_byte); + + assert_int_equal(test_data_crc16_checksum, crc_value); + + /* Calculating CRC of data with its CRC should yield zero if data + and/or checksum is correct */ + assert_int_equal(0, + crc16_byte(crc16_byte(crc_value, test_data_crc16_checksum >> 8), + test_data_crc16_checksum & 0xFF)); +} + +static void test_crc32_byte_zeros(void **state) +{ + uint16_t crc_value = 0u; + + /* Expect zero as crc value after calculating it for single zero byte */ + crc_value = crc32_byte(crc_value, 0); + assert_int_equal(0, crc_value); + + /* Expect zero crc for zero-byte stream */ + for (size_t i = 0; i < 1553; ++i) { + crc_value = crc32_byte(crc_value, 0); + assert_int_equal(0, crc_value); + } +} + +static void test_crc32_same_data_twice_different_value(void **state) +{ + uint16_t crc_value = 0u; + + /* Expect value to change after feeding crc function with the same byte twice. */ + crc_value = crc32_byte(crc_value, 0xDF); + assert_int_equal(0xf654, crc_value); + + crc_value = crc32_byte(crc_value, 0xDF); + assert_int_equal(0xa254, crc_value); +} + +static void test_crc32_byte_repeat_stream(void **state) +{ + uint8_t crc_value_1 = 0u; + uint8_t crc_value_2 = 0u; + const size_t iterations = 8935; + + /* Calculate CRC16 twice for the same data and expect the same result. + Ensure deterministic and repeatable behavior. */ + for (size_t i = 0; i < iterations; i++) { + const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); + crc_value_1 = crc32_byte(crc_value_1, value); + } + + for (size_t i = 0; i < iterations; i++) { + const uint8_t value = (i & 0xFF) ^ ((i >> 8) & 0xFF); + crc_value_2 = crc32_byte(crc_value_2, value); + } + + assert_int_equal(crc_value_1, crc_value_2); +} + +static void test_crc32_byte_single_bit_difference(void **state) +{ + uint8_t crc_value_1 = 0u; + uint8_t crc_value_2 = 0u; + + for (size_t i = 0; i < 1338; ++i) { + crc_value_1 = crc32_byte(crc_value_1, (i % 128) << 1); + crc_value_2 = crc32_byte(crc_value_2, (i % 128) << 1); + } + crc_value_1 = crc32_byte(crc_value_1, 0x33); + crc_value_2 = crc32_byte(crc_value_2, 0x32); + + /* Expect different CRC values for byte streams differing by one bit. */ + assert_int_not_equal(crc_value_1, crc_value_2); +} + +static void test_crc32_byte_static_data(void **state) +{ + uint8_t crc_value = CRC(test_data_u8, test_data_u8_sz, crc32_byte); + + assert_int_equal(test_data_crc32_checksum, crc_value); + + /* Calculating CRC of data with its CRC should yield zero if data + and/or checksum is correct */ + for (int i = 0; i < 4; ++i) + crc_value = crc32_byte(crc_value, (test_data_crc32_checksum >> 8 * i) & 0xFF); + assert_int_equal(0, crc_value); +} + +int main(void) +{ + const struct CMUnitTest tests[] = { + cmocka_unit_test(test_crc7_byte_zeros), + cmocka_unit_test(test_crc7_byte_same_byte_twice_different_value), + cmocka_unit_test(test_crc7_byte_repeat_stream), + cmocka_unit_test(test_crc7_byte_single_bit_difference), + cmocka_unit_test(test_crc7_byte_static_data), + + cmocka_unit_test(test_crc16_byte_zeros), + cmocka_unit_test(test_crc16_same_data_twice_different_value), + cmocka_unit_test(test_crc16_byte_repeat_stream), + cmocka_unit_test(test_crc16_byte_single_bit_difference), + cmocka_unit_test(test_crc16_byte_static_data), + + cmocka_unit_test(test_crc32_byte_zeros), + cmocka_unit_test(test_crc32_same_data_twice_different_value), + cmocka_unit_test(test_crc32_byte_repeat_stream), + cmocka_unit_test(test_crc32_byte_single_bit_difference), + cmocka_unit_test(test_crc32_byte_static_data), + }; + + return cmocka_run_group_tests(tests, NULL, NULL); +}