tdd-java-demo

commit f5e69179aa7825a725954946bdf930e771bd9ff0
parent 434d5bbde69db8abb13ba30ede22e1e9f3f2ee30
Author: Jul <jul@9o.is>
Date:   Wed, 31 Mar 2021 18:08:16 +0800

introduce parameter object Discount

Diffstat:
A
src/main/java/takehome/Discount.java
 | 
19
+++++++++++++++++++
M
src/main/java/takehome/Runner.java
 | 
12
++++++------

2 files changed, 25 insertions(+), 6 deletions(-)
diff --git a/src/main/java/takehome/Discount.java b/src/main/java/takehome/Discount.java
@@ -0,0 +1,19 @@
+package takehome;
+
+public class Discount {
+    private final Item item;
+    private final double amount;
+
+    public Discount(double amount, Item item) {
+        this.amount = amount;
+        this.item = item;
+    }
+
+    public Item getItem() {
+        return item;
+    }
+
+    public double getAmount() {
+        return amount;
+    }
+}
diff --git a/src/main/java/takehome/Runner.java b/src/main/java/takehome/Runner.java
@@ -30,19 +30,19 @@ public class Runner {
 
         Item item = items[3];
         double amount = 0.01;
-        total -= getDiscount(basket, item, amount);
+        total -= getDiscount(basket, new Discount(amount, item));
 
         DecimalFormat df = new DecimalFormat("0.00");
         out.println("Total: $" + df.format(total));
     }
 
-    private double getDiscount(Basket basket, Item item, double amount) {
-        double discount = 0;
-        double amountOfItems = basket.getAmounts().get(item);
+    private double getDiscount(Basket basket, Discount discount) {
+        double discountAmount = 0;
+        double amountOfItems = basket.getAmounts().get(discount.getItem());
         if (amountOfItems > 0) {
-            discount = amount;
+            discountAmount = discount.getAmount();
         }
-        return discount;
+        return discountAmount;
     }
 
     private Map<Item, Integer> getItemAmounts(Item[] items) {