test: added unban_peer() test (#1039)

Co-authored-by: lambdaclass-user <github@lambdaclass.com>

crates/net/network/src/peers/manager.rs

@@ -1153,6 +1153,43 @@ mod test {
         .await;
     }
 
+    #[tokio::test]
+    async fn test_unban() {
+        let peer = PeerId::random();
+        let socket_addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 1, 2)), 8008);
+        let mut peers = PeersManager::default();
+        peers.ban_peer(peer);
+        peers.add_peer(peer, socket_addr, None);
+
+        match event!(peers) {
+            PeerAction::BanPeer { peer_id } => {
+                assert_eq!(peer_id, peer);
+            }
+            _ => unreachable!(),
+        }
+
+        poll_fn(|cx| {
+            assert!(peers.poll(cx).is_pending());
+            Poll::Ready(())
+        })
+        .await;
+
+        peers.unban_peer(peer);
+
+        match event!(peers) {
+            PeerAction::UnBanPeer { peer_id } => {
+                assert_eq!(peer_id, peer);
+            }
+            _ => unreachable!(),
+        }
+
+        poll_fn(|cx| {
+            assert!(peers.poll(cx).is_pending());
+            Poll::Ready(())
+        })
+        .await;
+    }
+
     #[tokio::test]
     async fn test_backoff_on_busy() {
         let peer = PeerId::random();