Robot need to piouff some time :)

src/robot.rs

@@ -69,6 +69,14 @@ pub fn is_instructions(v: &Vec<char>) -> bool {
     true
 }
 
+/// Check if a robot is piouff.
+pub fn is_piouff(r: &Robot) -> bool {
+    if r.i.len() == 0 {
+        return true;
+    }
+    false
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -121,4 +129,19 @@ mod tests {
         let v = vec!['F', 'R', 'L', 'Z'];
         assert!(is_instructions(&v));
     }
+
+    #[test]
+    fn test_piouf() {
+        let mut r: Robot = Robot::new(
+            0,
+            Orientation::N,
+            Position { x: 1, y: 2 },
+            vec!['R', 'F', 'L', 'F'],
+        );
+        r.i.pop();
+        r.i.pop();
+        r.i.pop();
+        r.i.pop();
+        assert!(is_piouff(&r));
+    }
 }