add test get ip V6 in TCP connection

src/client/tcp_connection.rs

@@ -106,7 +106,7 @@ mod tcp_connection_test{
 
     use super::*;
     use core::time;
-    use std::net::{IpAddr,Ipv4Addr};
+    use std::net::{IpAddr,Ipv4Addr,Ipv6Addr};
     use crate::domain_name::DomainName;
     use crate::message::type_qtype::Qtype;
     use crate::message::class_qclass::Qclass;
@@ -135,6 +135,15 @@ mod tcp_connection_test{
         assert_eq!(connection.get_ip(), IpAddr::V4(Ipv4Addr::new(192, 168, 0, 1)));
     }
 
+    #[test]
+    fn get_ip_v6(){
+        let ip_address = IpAddr::V6(Ipv6Addr::new(0xc0, 0xa8, 0, 1, 0, 0, 0, 0));
+        let timeout = Duration::from_secs(100);
+        let connection = ClientTCPConnection::new(ip_address, timeout);
+        //check if the ip is the same
+        assert_eq!(connection.get_ip(), IpAddr::V6(Ipv6Addr::new(0xc0, 0xa8, 0, 1, 0, 0, 0, 0)));
+    }
+
     //Setters and Getters test
     #[test]
     fn get_server_addr(){