tcp_cmd

add pbuf_copy_partial moc so I don't need if TESTING preprocessor directive

tests/tcp_cmd.cpp

@@ -209,11 +209,8 @@ static err_t tcp_cmd_recv_new(void* arg, struct tcp_pcb* pcb, struct pbuf* p, er
             LOG_WARN(TAG, "Command too long");
         }
         size_t len = p->tot_len >= MAX_CMD_LEN ? MAX_CMD_LEN : p->tot_len;
-        #if TESTING
-        memcpy(cmd, p->payload, len);
-        #else
+        
         pbuf_copy_partial(p, cmd, len, 0);
-        #endif
         cmd[len] = '\0';
         
         remove_newline(cmd);