OSSL_STR80
res += TEST_int_eq(trace_string(0, 0, OSSL_STR80), strlen(OSSL_STR80));
res += TEST_int_eq(trace_string(0, 0, OSSL_STR81), strlen(OSSL_STR80));
static const char expected[] = OSSL_START "\n" OSSL_HELLO OSSL_STR80 "[len 81 limited to 80]: " OSSL_STR80
#define OSSL_STR81 (OSSL_STR80 "x")