reward value

src/main/java/RewardValue.java

@@ -0,0 +1,27 @@
+public class RewardValue {
+    private Double Cash = null;
+    private Integer Miles = null;
+    public static final double MILES_TO_CASH = 0.0035;
+
+    public RewardValue(double CashValue) {
+        this.Cash = CashValue;
+    }
+
+    public RewardValue(int MilesValue) {
+        this.Miles = MilesValue;
+    }
+
+    public double getCashValue() {
+        if (Cash != null) {
+            return Cash;
+        }
+        return MILES_TO_CASH * Miles;
+    }
+
+    public Integer getMilesValue() {
+        if (Miles != null) {
+            return Miles;
+        }
+        return (int) (1 / MILES_TO_CASH * Cash);
+    }
+}

src/test/java/RewardValueTests.java

@@ -20,11 +20,19 @@ void create_with_miles_value() {
 
     @Test
     void convert_from_cash_to_miles() {
-        assert false;
+        // assert false;
+        double cashValue = 100;
+        var rewardValue = new RewardValue(cashValue);
+        int milesValue = rewardValue.getMilesValue();
+        assertEquals(milesValue, (int) (cashValue / RewardValue.MILES_TO_CASH));
     }
 
     @Test
     void convert_from_miles_to_cash() {
-        assert false;
+        //assert false;
+        int milesValue = 1000;
+        var rewardValue = new RewardValue(milesValue);
+        double cashValue = rewardValue.getCashValue();
+        assertEquals(cashValue, milesValue * RewardValue.MILES_TO_CASH);
     }
 }