prevent loop when none input

chess_uci/src/lib.rs

@@ -1,7 +1,7 @@
 #![allow(dead_code)]
 
 /// Manage UCI messages and link into chess component
-mod uci_command;
+pub mod uci_command;
 
 use log::{info, warn};
 use std::io::*;
@@ -63,10 +63,12 @@ impl<Fi: Read, Fo:  Write> UciEngine<Fi, Fo> {
         self.push(GuiCommand::Uci);
 
         // Consume commands until uciok messages
+        if self.source.is_some() {
             while !self.uciok {
                 self.pull();
             }
         }
+    }
 
     /// Initialize a new game
     ///