setup_check_update
setup_check_update(&fixture, 0, NULL, 0, NULL, NULL);
setup_check_update(&fixture, 0, allow_unprotected, 0, NULL, NULL);
setup_check_update(&fixture, 1, allow_unprotected, 1, NULL, NULL);
setup_check_update(&fixture, 1, allow_unprotected, 1, trans_id, NULL);
setup_check_update(&fixture, 0, allow_unprotected, 1, rand_data, NULL);
setup_check_update(&fixture, 1, allow_unprotected, 1, NULL, rec_nonce);
setup_check_update(&fixture, 0, allow_unprotected, 1, NULL, rand_data);