tests/lib/memcmp-test.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 /* Include memcmp() source code and alter its name to compare results with libc memcmp() */
   4 #define memcmp cb_memcmp
   5
   6 #include "../lib/memcmp.c"
   7
   8 #undef cb_memcmp
   9
  10 #include <tests/test.h>
  11 #include <string.h>
  12
  13 const char test_data1[] = "TEST_DATA @4321 !@#$%^&*\\/";
  14 const size_t test_data1_sz = sizeof(test_data1);
  15
  16 const char test_data2[] = "TEST_DATA @8765 !@#$%^&*\\/";
  17 const char test_data2_sz = sizeof(test_data2);
  18
  19 static void test_data_correctness(void **state)
  20 {
  21         assert_int_equal(sizeof(test_data1), test_data1_sz);
  22         assert_int_equal(sizeof(test_data2), test_data2_sz);
  23         assert_int_equal(test_data1_sz, test_data2_sz);
  24 }
  25
  26 static void test_memcmp_equal(void **state)
  27 {
  28         const int res_cb = cb_memcmp(test_data1, test_data1, test_data1_sz);
  29         const int res_std = memcmp(test_data1, test_data1, test_data1_sz);
  30
  31         assert_int_equal(0, res_cb);
  32         assert_int_equal(res_cb, res_std);
  33 }
  34
  35 static void test_memcmp_first_not_matching_lower(void **state)
  36 {
  37         const int res_cb = cb_memcmp(test_data1, test_data2, test_data1_sz);
  38         const int res_std = memcmp(test_data1, test_data2, test_data1_sz);
  39
  40         assert_true(res_cb < 0);
  41         assert_int_equal(res_cb, res_std);
  42 }
  43
  44 static void test_memcmp_first_not_matching_higher(void **state)
  45 {
  46         const int res_cb = cb_memcmp(test_data2, test_data1, test_data1_sz);
  47         const int res_std = memcmp(test_data2, test_data1, test_data1_sz);
  48
  49         assert_true(res_cb > 0);
  50         assert_int_equal(res_cb, res_std);
  51 }
  52
  53 static void test_memcmp_zero_size(void **state)
  54 {
  55         const int res_cb = cb_memcmp(test_data1, test_data2, 0);
  56         const int res_std = memcmp(test_data1, test_data2, 0);
  57
  58         assert_int_equal(0, res_cb);
  59         assert_int_equal(res_cb, res_std);
  60 }
  61
  62 int main(void)
  63 {
  64         const struct CMUnitTest tests[] = {
  65                 cmocka_unit_test(test_data_correctness),
  66                 cmocka_unit_test(test_memcmp_equal),
  67                 cmocka_unit_test(test_memcmp_first_not_matching_lower),
  68                 cmocka_unit_test(test_memcmp_first_not_matching_higher),
  69                 cmocka_unit_test(test_memcmp_zero_size),
  70         };
  71
  72         return cb_run_group_tests(tests, NULL, NULL);
  73 }