Add local_addr method to fetch the current SocketAddr used.

- Handy when using wildcard ports.
- Also update test to use wildcard ports.

Author: randombtree

src/lib.rs

@@ -131,10 +131,14 @@ mod tests {
 	block_on(async {
 	    let server_service = TestService::new();
 	    let client_service = TestService::new();
-	    let server_addr: SocketAddr = "127.0.0.1:30000".parse().unwrap();
-	    let client_addr: SocketAddr = "127.0.0.1:30001".parse().unwrap();
-	    let server = RpcServer::bind(server_addr, server_service.clone()).await.unwrap();
-	    let client  = RpcServer::bind(client_addr, client_service.clone()).await.unwrap();
+	    let addr: SocketAddr = "127.0.0.1:0".parse().unwrap();
+	    let [client, server] = [&client_service, &server_service]
+		.map(|service| async {
+		    let rpc = RpcServer::bind(addr, service.clone()).await.unwrap();
+		    let addr = rpc.local_addr();
+		    (rpc, addr)
+		});
+	    let ((client, client_addr), (server, server_addr)) = futures::future::join(client, server).await;
 
 	    // Test string -> string
 	    let hello_ret = timed_future!(client.hello(server_addr, "foo".into()));

src/server.rs

@@ -198,6 +198,12 @@ impl<T: RpcService + Sync + Send +'static> RpcServer<T>
 	})
     }
 
+    /// Get the socket bound address
+    pub fn local_addr(&self) -> SocketAddr {
+	self.inner.socket.local_addr()
+	    .expect("Socket lost it's address?")
+    }
+
     fn handle_packet(inner: Arc<RpcServerInner<T>>, source: SocketAddr, packet: Vec<u8>) {
 
 	match packet[0] {