added test of function check collisions

src/main.rs

@@ -29,11 +29,12 @@ fn check_map(r: &robot::Robot, w: &world::World) -> Result<(), String> {
         Ok(())
     }
 }
+
 /// Check if the robot collide with another one at the given position.
 fn check_collisions(
     r: &robot::Robot,
     w: &world::World,
-    h: HashMap<&robot::Position, &u32>,
+    h: &HashMap<&robot::Position, &u32>,
 ) -> Result<(), String> {
     match h.get(&r.p) {
         Some(&x) => Err(format!(
@@ -43,6 +44,7 @@ fn check_collisions(
         None => Ok(()),
     }
 }
+
 /// Parse the config file, generate the world and robot pool.
 fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::World, &'static str> {
     let mut lines = conf.lines();
@@ -134,4 +136,20 @@ mod tests {
 
         assert!(check_map(&r, &w).is_ok());
     }
+
+    #[test]
+    #[should_panic]
+    fn test_check_collisions() {
+        let mut r = robot::Robot::new(
+            0,
+            robot::Orientation::N,
+            robot::Position { x: 2, y: 3 },
+            vec!['F'],
+        );
+        let w = world::World { x: 10, y: 10 };
+
+        let mut h: HashMap<&robot::Position, &u32> = HashMap::new();
+        h.insert(&robot::Position { x: 2, y: 3 }, &1);
+        assert!(check_collisions(&r, &w, &h).is_ok());
+    }
 }