| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <commonlib/rational.h> |
| #include <tests/test.h> |
| |
| struct rational_test_param { |
| unsigned long num, den; |
| unsigned long max_num, max_den; |
| unsigned long exp_num, exp_den; |
| }; |
| |
| static const struct rational_test_param test_params[] = { |
| /* Exceeds bounds, semi-convergent term > half last term */ |
| { 1230, 10, 100, 20, 100, 1}, |
| /* Exceeds bounds, semi-convergent term < half last term */ |
| { 34567, 100, 120, 20, 120, 1}, |
| /* Closest to zero */ |
| { 1, 30, 100, 10, 0, 1}, |
| /* Closest to smallest non-zero */ |
| { 1, 19, 100, 10, 1, 10}, |
| /* Exact answer */ |
| { 1155, 7735, 255, 255, 33, 221}, |
| /* Convergent */ |
| { 27, 32, 16, 16, 11, 13}, |
| /* Convergent, semiconvergent term half convergent term */ |
| { 67, 54, 17, 18, 5, 4}, |
| /* Semiconvergent, semiconvergent term half convergent term */ |
| { 453, 182, 60, 60, 57, 23}, |
| /* Semiconvergent, numerator limit */ |
| { 87, 32, 70, 32, 68, 25}, |
| /* Semiconvergent, demominator limit */ |
| { 14533, 4626, 15000, 2400, 7433, 2366}, |
| }; |
| |
| static void test_rational(void **state) |
| { |
| int i; |
| unsigned long num = 0, den = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(test_params); i++) { |
| rational_best_approximation(test_params[i].num, test_params[i].den, |
| test_params[i].max_num, test_params[i].max_den, |
| &num, &den); |
| assert_int_equal(num, test_params[i].exp_num); |
| assert_int_equal(den, test_params[i].exp_den); |
| } |
| } |
| |
| int main(void) |
| { |
| const struct CMUnitTest tests[] = { |
| cmocka_unit_test(test_rational), |
| }; |
| |
| return cmocka_run_group_tests(tests, NULL, NULL); |
| } |
| |