N_TESTS
#define N_TESTS (sizeof(base64_tests) / sizeof(*base64_tests))
#define N_TESTS (sizeof(bio_dump_testcases) / sizeof(bio_dump_testcases[0]))
#define N_TESTS (sizeof(ffdh_tests) / sizeof(ffdh_tests[0]))
#define N_TESTS 100
#define N_TESTS (sizeof(gcm128_tests) / sizeof(*gcm128_tests))