first steps with refs

src/player.rs

@@ -12,7 +12,7 @@ impl Player {
     pub fn new(name: &str, max_life: i16) -> Player {
         Player {
             name: name.to_string(),
-            position: Position::new(0, 1, 1),
+            position: Position::new(0, 0, 0),
             life: max_life,
             max_life,
         }
@@ -26,6 +26,9 @@ impl Player {
     pub fn get_life(&self) -> i16 {
         self.life
     }
+    pub fn get_position(&mut self) -> &mut Position {
+        &mut self.position
+    }
 }
 
 #[test]
@@ -54,4 +57,17 @@ fn test_change_life() {
     assert_eq!(p.life, 10);
     p.change_life(-12);
     assert_eq!(p.life, 0);
-}
+}
+
+#[test]
+fn player_can_move() {
+    let mut p = Player::new("Teddy Tester", 10);
+    assert_eq!(p.get_position(), &Position::new(0, 0, 0));
+    p.get_position().change(1, 2);
+    assert_eq!(p.get_position(), &Position::new(0, 1, 2));
+    p.get_position().change(2, 1);
+    assert_eq!(p.get_position(), &Position::new(0, 3, 3));
+    p.get_position().set(1, 2, 3);
+    p.get_position().change(2, 1);
+    assert_eq!(p.get_position(), &Position::new(1, 4, 4));
+}