refactor: Refactored test methods

src/test/java/com/f_lab/la_planete/domain/FoodTest.java

@@ -14,9 +14,9 @@ class FoodTest {
   @DisplayName("음식 수량을 줄였을 때 성공")
   void test_minus_food_quantity_success() {
     // given
-    Food food = new Food();
-    food.setPrice(BigDecimal.valueOf(1000));
-    food.setTotalQuantity(10);
+    BigDecimal price = BigDecimal.valueOf(1000);
+    int quantity = 10;
+    Food food = createFood(price, quantity);
 
     // when
     food.minusQuantity(5);
@@ -29,12 +29,19 @@ void test_minus_food_quantity_success() {
   @DisplayName("음식 수량을 줄였을 때 수량보다 많아서 실패할 때 예외 던짐")
   void test_minus_food_quantity_fail() {
     // given
-    Food food = new Food();
-    food.setPrice(BigDecimal.valueOf(1000));
-    food.setTotalQuantity(10);
+    BigDecimal price = BigDecimal.valueOf(1000);
+    int quantity = 10;
+    Food food = createFood(price, quantity);
 
     // then
     assertThatThrownBy(() -> food.minusQuantity(11))
         .isInstanceOf(IllegalStateException.class);
   }
+
+  private Food createFood(BigDecimal price, int quantity) {
+    return Food.builder()
+        .price(price)
+        .totalQuantity(quantity)
+        .build();
+  }
 }

src/test/java/com/f_lab/la_planete/domain/OrderTest.java

@@ -25,45 +25,52 @@ class OrderTest {
       .totalQuantity(1000)
       .build();
 
-  Voucher voucher = Voucher.builder()
-      .discountRate(BigDecimal.valueOf(0.45))
-      .expiryDate(LocalDateTime.of(3000, Month.DECEMBER, 12, 23, 59))
-      .build();
-
   @Test
   @DisplayName("할인 쿠폰이 있는 경우에 calculateTotalCost() 메서드")
   void test_totalCost_given_food_and_voucher_success() {
     // given
-    BigDecimal totalCost = food.calculateCost(3);
-    Order order = Order.builder()
-        .food(food)
-        .totalCost(totalCost)
-        .quantity(3)
-        .voucher(voucher)
-        .build();
+    int quantity = 3;
+    BigDecimal totalCost = food.calculateCost(quantity);
+    Voucher voucher = createVoucher();
+    Order order = createOrder(totalCost, quantity, voucher);
 
     // when
     BigDecimal calculatedTotalCost = order.calculateTotalCost();
 
     // then
-    Assertions.assertThat(calculatedTotalCost).isEqualTo(BigDecimal.valueOf(16500));
+    BigDecimal NUM_16500 = BigDecimal.valueOf(16500);
+    Assertions.assertThat(calculatedTotalCost).isEqualTo(NUM_16500);
   }
 
   @Test
   @DisplayName("할인 쿠폰이 없는 경우에 calculateTotalCost() 메서드")
   void test_totalCost_given_food_and_without_voucher_success() {
     // given
-    BigDecimal totalCost = food.calculateCost(3);
-    Order order = Order.builder()
-        .food(food)
-        .totalCost(totalCost)
-        .quantity(3)
-        .build();
+    int quantity = 3;
+    BigDecimal totalCost = food.calculateCost(quantity);
+    Order order = createOrder(totalCost, quantity, null);
 
     // when
     BigDecimal calculatedTotalCost = order.calculateTotalCost();
 
     // then
-    Assertions.assertThat(calculatedTotalCost).isEqualTo(BigDecimal.valueOf(30000));
+    BigDecimal NUM_30000 = BigDecimal.valueOf(30000);
+    Assertions.assertThat(calculatedTotalCost).isEqualTo(NUM_30000);
+  }
+
+  private Order createOrder(BigDecimal totalCost, int quantity, Voucher voucher) {
+    return Order.builder()
+        .food(food)
+        .totalCost(totalCost)
+        .quantity(quantity)
+        .voucher(voucher)
+        .build();
+  }
+
+  private Voucher createVoucher() {
+    return Voucher.builder()
+        .discountRate(BigDecimal.valueOf(0.45))
+        .expiryDate(LocalDateTime.of(3000, Month.DECEMBER, 12, 23, 59))
+        .build();
   }
 }

src/test/java/com/f_lab/la_planete/domain/VoucherTest.java

@@ -28,8 +28,8 @@ class VoucherTest {
   @DisplayName("0 ~ 100 사이의 값이 들어올 때 정상적으로 할인이 적용된 값을 return")
   void test_voucher_discount_success() {
     // given
-    Voucher voucher = new Voucher();
-    voucher.setDiscountRate(BigDecimal.valueOf(0.25));
+    BigDecimal discountRate = BigDecimal.valueOf(0.25);
+    Voucher voucher = createVoucher(discountRate);
 
     // when
     BigDecimal afterDiscountsGBP1 = voucher.apply(BigDecimal.valueOf(100), GBP);
@@ -46,13 +46,18 @@ void test_voucher_discount_success() {
   @DisplayName("currency 값에 null 값이 들어갔을 경우에 예외를 던진다.")
   void test_voucher_discount_failure() {
     // given
-    Voucher voucher = new Voucher();
-    voucher.setDiscountRate(BigDecimal.valueOf(0.25));
+    BigDecimal discountRate = BigDecimal.valueOf(0.25);
+    Voucher voucher = createVoucher(discountRate);
 
     // when
     assertThatThrownBy(() ->
         voucher.apply(BigDecimal.valueOf(100), null)
     ).isInstanceOf(IllegalStateException.class);
+  }
 
+  private Voucher createVoucher(BigDecimal discountRate) {
+    return Voucher.builder()
+        .discountRate(discountRate)
+        .build();
   }
 }