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Diffstat (limited to 'tests/bitfield_tests.c')
| -rw-r--r-- | tests/bitfield_tests.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/tests/bitfield_tests.c b/tests/bitfield_tests.c new file mode 100644 index 00000000..d248989b --- /dev/null +++ b/tests/bitfield_tests.c @@ -0,0 +1,225 @@ +#include <check.h> +#include <stdint.h> +#include <bitfield/bitfield.h> + +START_TEST (test_large_bitmask) +{ + // yeah, this isn't a public method but I wanted to unit test it to track + // down a bug + extern uint64_t bitmask(int numBits); + uint64_t result = bitmask(32); + fail_if(result != 0xffffffff); +} +END_TEST + +START_TEST (test_one_bit_not_swapped) +{ + uint64_t data = 0x80; + uint64_t result = getBitField(data, 0, 1, false); + fail_if(result == 1); +} +END_TEST + +START_TEST (test_one_bit) +{ + uint64_t data = 0x8000000000000000; + uint64_t result = getBitField(data, 0, 1, false); + fail_unless(result == 0x1, + "First bits in 0x%X was 0x%X instead of 0x1", data, result); +} +END_TEST + +START_TEST (test_32_bit_parse) +{ + uint64_t data = 0x0402574d555a0401; + uint64_t result = getBitField(data, 16, 32, false); + uint64_t expectedValue = 0x574d555a; + fail_unless(result == expectedValue, + "Field retrieved in 0x%X was 0x%X instead of %d", data, + result, expectedValue); +} +END_TEST + +START_TEST (test_16_bit_parse) +{ + uint64_t data = 0xF34DFCFF00000000; + uint64_t result = getBitField(data, 16, 16, false); + uint64_t expectedValue = 0xFCFF; + fail_unless(result == expectedValue, + "Field retrieved in 0x%X was 0x%X instead of %d", data, + result, expectedValue); +} +END_TEST + +START_TEST (test_one_byte) +{ + uint64_t data = 0xFA00000000000000; + uint64_t result = getBitField(data, 0, 4, false); + fail_unless(result == 0xF, + "First 4 bits in 0x%X was 0x%X instead of 0xF", data, result); + result = getBitField(data, 4, 4, false); + fail_unless(result == 0xA, + "First 4 bits in 0x%X was 0x%X instead of 0xA", data, result); + result = getBitField(data, 0, 8, false); + fail_unless(result == 0xFA, + "All bits in 0x%X were 0x%X instead of 0x%X", data, result, data); +} +END_TEST + +START_TEST (test_multi_byte) +{ + uint64_t data = 0x12FA000000000000; + uint64_t result = getBitField(data, 0, 4, false); + fail_unless(result == 0x1, + "First 4 bits in 0x%X was 0x%X instead of 0xF", (data >> 60) & 0xF, + result); + result = getBitField(data, 4, 4, false); + fail_unless(result == 0x2, + "Second 4 bits in 0x%X was %d instead of 0xA", (data >> 56) & 0xF, + result); + result = getBitField(data, 8, 4, false); + fail_unless(result == 0xF, + "First 4 bits in 0x%X was %d instead of 0x1", (data >> 52) & 0xF, + result); + result = getBitField(data, 12, 4, false); + fail_unless(result == 0xA, + "Second 4 bits in 0x%X was %d instead of 0x2", (data >> 48) % 0xF, + result); +} +END_TEST + +START_TEST (test_get_multi_byte) +{ + uint64_t data = 0x12FA000000000000; + uint64_t result = getBitField(data, 0, 9, false); + ck_assert_int_eq(result, 0x25); +} +END_TEST + +START_TEST (test_get_off_byte_boundary) +{ + uint64_t data = 0x000012FA00000000; + uint64_t result = getBitField(data, 12, 8, false); + ck_assert_int_eq(result, 0x01); +} END_TEST + +START_TEST (test_set_field) +{ + uint64_t data = 0; + setBitField(&data, 1, 0, 1); + uint64_t result = getBitField(data, 0, 1, false); + ck_assert_int_eq(result, 0x1); + data = 0; + setBitField(&data, 1, 1, 1); + result = getBitField(data, 1, 1, false); + ck_assert_int_eq(result, 0x1); + + data = 0; + setBitField(&data, 0xf, 3, 4); + result = getBitField(data, 3, 4, false); + ck_assert_int_eq(result, 0xf); +} +END_TEST + +START_TEST (test_set_doesnt_clobber_existing_data) +{ + uint64_t data = 0xFFFC4DF300000000; + setBitField(&data, 0x4fc8, 16, 16); + uint64_t result = getBitField(data, 16, 16, false); + fail_unless(result == 0x4fc8, + "Field retrieved in 0x%X was 0x%X instead of 0x%X", data, result, + 0xc84f); + + data = 0x8000000000000000; + setBitField(&data, 1, 21, 1); + fail_unless(data == 0x8000040000000000LLU, + "Expected combined value 0x8000040000000000 but got 0x%X%X", + data >> 32, data); +} +END_TEST + +START_TEST (test_set_off_byte_boundary) +{ + uint64_t data = 0xFFFC4DF300000000; + setBitField(&data, 0x12, 12, 8); + uint64_t result = getBitField(data, 12, 12, false); + ck_assert_int_eq(result,0x12d); +} +END_TEST + +START_TEST (test_set_odd_number_of_bits) +{ + uint64_t data = 0xFFFC4DF300000000LLU; + setBitField(&data, 0x12, 11, 5); + uint64_t result = getBitField(data, 11, 5, false); + fail_unless(result == 0x12, + "Field set in 0x%X%X%X%X was %d instead of %d", data, result, + 0x12); + + data = 0xFFFC4DF300000000LLU; + setBitField(&data, 0x2, 11, 5); + result = getBitField(data, 11, 5, false); + fail_unless(result == 0x2, + "Field set in 0x%X%X%X%X was %d instead of %d", data, result, + 0x2); +} +END_TEST + +START_TEST(test_nth_byte) +{ + uint64_t data = 0x00000000F34DFCFF; + uint8_t result = nthByte(data, 0); + uint8_t expected = 0x0; + ck_assert_int_eq(result, expected); + + result = nthByte(data, 4); + expected = 0xF3; + ck_assert_int_eq(result, expected); + + result = nthByte(data, 5); + expected = 0x4D; + ck_assert_int_eq(result, expected); + + result = nthByte(data, 6); + expected = 0xFC; + ck_assert_int_eq(result, expected); + + result = nthByte(data, 7); + expected = 0xFF; + ck_assert_int_eq(result, expected); +} +END_TEST + +Suite* bitfieldSuite(void) { + Suite* s = suite_create("bitfield"); + TCase *tc_core = tcase_create("core"); + tcase_add_test(tc_core, test_large_bitmask); + tcase_add_test(tc_core, test_one_bit); + tcase_add_test(tc_core, test_one_bit_not_swapped); + tcase_add_test(tc_core, test_one_byte); + tcase_add_test(tc_core, test_16_bit_parse); + tcase_add_test(tc_core, test_32_bit_parse); + tcase_add_test(tc_core, test_multi_byte); + tcase_add_test(tc_core, test_get_multi_byte); + tcase_add_test(tc_core, test_get_off_byte_boundary); + tcase_add_test(tc_core, test_set_field); + tcase_add_test(tc_core, test_set_doesnt_clobber_existing_data); + tcase_add_test(tc_core, test_set_off_byte_boundary); + tcase_add_test(tc_core, test_set_odd_number_of_bits); + tcase_add_test(tc_core, test_nth_byte); + suite_add_tcase(s, tc_core); + + return s; +} + +int main(void) { + int numberFailed; + Suite* s = bitfieldSuite(); + SRunner *sr = srunner_create(s); + // Don't fork so we can actually use gdb + srunner_set_fork_status(sr, CK_NOFORK); + srunner_run_all(sr, CK_NORMAL); + numberFailed = srunner_ntests_failed(sr); + srunner_free(sr); + return (numberFailed == 0) ? 0 : 1; +} |