added test sketch

Author: gbr1

examples/test/server_test

@@ -0,0 +1,76 @@
+/*
+    This file is part of the Arduino_RouterBridge library.
+
+    Copyright (c) 2025 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+    
+*/
+
+// to run this test example, launch server_test in a shell and then this sketch
+
+
+/* available registers 
+    register("ping")
+    register("0_args_no_result")
+    register("1_args_no_result")
+    register("2_args_no_result")
+    register("0_args_bool_result")
+    register("1_args_bool_result")
+    register("2_args_bool_result")
+*/
+
+#include "Arduino_RouterBridge.h"
+
+bool x;
+int i=0;
+
+void setup() {
+   Bridge.begin();
+   Monitor.begin();
+}
+
+void loop() {
+
+    //testing monitor
+    Monitor.println(String(i)+"\t"+String(x));
+    i++;
+    //working
+    Bridge.call("0_args_no_result");
+
+    if (Bridge.call("0_args_no_result")){
+      Monitor.println("ok");                                  // return true because no result
+    }
+    else{
+      Monitor.println("no");
+    }
+
+    if (Bridge.call("0_args_bool_result")){
+      Monitor.println("ok");
+    }
+    else{
+      Monitor.println("no");                                  // return false because you need check the result
+    }
+
+    x=false;
+    if (Bridge.call("0_args_bool_result").result(x)){
+      Monitor.println("ok "+String(x));                       // return true - the perfect call
+    }
+    else{
+      Monitor.println("no "+String(x));
+    }
+
+
+    //avoid to do followings
+
+    RpcResult result = Bridge.call("0_args_bool_result");    // the call happens but you won't get the result
+
+    bool x = false;
+    RpcResult result2 = Bridge.call("0_args_bool_result"); 
+    result2.result(x);
+    Monitor.println("Result: "+String(x));                   // return true, so the right result
+
+    delay(1000);
+}