RAND_set1_random_provider
if (!RAND_set1_random_provider(libctx, prov)) {
int RAND_set1_random_provider(OSSL_LIB_CTX *ctx, OSSL_PROVIDER *p);
|| !TEST_true(RAND_set1_random_provider(ctx, prov))
if (!TEST_true(RAND_set1_random_provider(ctx, NULL))
if (!TEST_true(RAND_set1_random_provider(ctx, prov))