+ assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_CLIENTID) == -EINVAL);
+ assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_DNS_SERVERS) == -EEXIST);
+ assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_NTP_SERVER) == -EEXIST);
+ assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_SNTP_SERVERS) == 0);
+ assert_se(sd_dhcp6_client_set_request_option(client, DHCP6_OPTION_DOMAIN_LIST) == -EEXIST);
+ assert_se(sd_dhcp6_client_set_request_option(client, 10) == -EINVAL);
+