add gold to the player

src/player.rs

@@ -6,6 +6,7 @@ pub struct Player {
     position: Position,
     life: i16,
     max_life: i16,
+    gold: usize,
 }
 
 impl Player {
@@ -15,6 +16,7 @@ impl Player {
             position: Position::new(0, 0, 0),
             life: max_life,
             max_life,
+            gold: 0,
         }
     }
     pub fn get_name(&self) -> String {
@@ -29,6 +31,12 @@ impl Player {
     pub fn get_position(&mut self) -> &mut Position {
         &mut self.position
     }
+
+    /// add the given amount to the players gold stash
+    pub fn retrieve_gold(&mut self, amount: usize) { self.gold += amount }
+
+    /// return the size of the players gold stash
+    pub fn get_gold(&self) -> usize { self.gold }
 }
 
 #[test]
@@ -38,10 +46,21 @@ fn test_get_name() {
         position: Position::new(0, 1, 1),
         life: 5,
         max_life: 10,
+        gold: 0,
     };
     assert_eq!(p.get_name(), "Teddy Tester");
 }
 
+#[test]
+fn test_can_receive_gold() {
+    let mut p = Player::new("Teddy Tester", 10);
+    assert_eq!(p.get_gold(), 0);
+
+    p.retrieve_gold(13);
+    p.retrieve_gold(10);
+    assert_eq!(p.get_gold(), 23);
+}
+
 #[test]
 fn test_change_life() {
     let mut p = Player {
@@ -49,6 +68,7 @@ fn test_change_life() {
         position: Position::new(0, 1, 1),
         life: 5,
         max_life: 10,
+        gold: 0,
     };
     assert_eq!(p.life, 5);
     p.change_life(-2);