diff --git a/src/main.rs b/src/main.rs
index 4d64130..94921f7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -199,7 +199,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let matches = App::new("DancingDroids")
         .version("0.3.0")
         .about("When droids dance togethers")
-        .arg(
+        arg(
             Arg::with_name("file")
                 .short("f")
                 .long("file")
@@ -319,4 +319,16 @@ mod tests {
         h.insert(robot::Position { x: 2, y: 3 }, 1);
         assert!(check_collisions(&r, &h).is_ok());
     }
+
+        fn test_parse() {
+        let conf: String = String::from("5 5\n\n1 1 N\nFLLFRF\n\n3 2 S\nFFLFRRF\n");
+        let mut robot_pool: Vec<robot::Robot> = Vec::new();
+        assert!(parse_config(conf, &mut robot_pool).is_ok());
+        let conf: String = String::from("5 a\n\n1 1 N\nFLLFRF\n\n3 2 S\nFFLFRRF\n");
+        assert!(parse_config(conf, &mut robot_pool).is_err());
+        let conf: String = String::from("5 5\n\n1 1 N\nZLLFRF\n\n3 2 S\nFFLFRRF\n");
+        assert!(parse_config(conf, &mut robot_pool).is_err());
+        let conf: String = String::from("5 5\n\n1 1 R\nFLLFRF\n\n3 2 S\nFFLFRRF\n");
+        assert!(parse_config(conf, &mut robot_pool).is_err());
+    }
 }