Add create() and new() methods to the Robot type

src/main.rs

@@ -46,6 +46,26 @@ struct Robot {
 }
 
 impl Robot {
+    /// Create a empty Robot.
+    fn new() -> Robot {
+        Robot {
+            id: 0,
+            o: Orientation::N,
+            p: Position { x: 0, y: 0 },
+            q: queue![],
+        }
+    }
+    /// Initialize a new Robot.
+    fn create(&mut self, id: u32, o: Orientation, p: Position, s: String) {
+        let mut q: Queue<char> = queue![];
+        for c in s.chars() {
+            q.add(c);
+        }
+        self.id = id;
+        self.o = o;
+        self.p = p;
+        self.q = q;
+    }
     /// Apply forward instruction to the robot.
     fn move_forward(&mut self) {
         match self.o {
@@ -193,6 +213,20 @@ mod tests {
         assert_eq!(w.map, vec!['.'; 25]);
     }
 
+    #[test]
+    fn test_create_robot() {
+        let mut r: Robot = Robot::new();
+        r.create(1, Orientation::N, Position { x: 1, y: 1 }, "FF".to_string());
+        assert_eq!(r.id, 1);
+        assert!(matches!(r.o, Orientation::N));
+
+        assert_eq!(r.p.x, 1);
+        assert_eq!(r.p.y, 1);
+
+        assert_eq!(r.q.peek(), Ok('F'));
+        assert_eq!(r.q.peek(), Ok('F'));
+    }
+
     #[test]
     fn test_set_robot() {
         let r = Robot {