[Refactor] 장바구니 상품 추가 Dto 클래스 타입 record로 변경 및 ErrorCode 추가

src/main/java/com/teamA/hicardi/domain/cart/controller/CartController.java

@@ -1,13 +1,11 @@
 package com.teamA.hicardi.domain.cart.controller;
 
-import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
 import com.teamA.hicardi.common.dto.ResponseDto;
@@ -24,7 +22,6 @@ public class CartController {
 	private final CartService cartService;
 
 	@PostMapping("/add")
-	@ResponseStatus(HttpStatus.NO_CONTENT)
 	public ResponseEntity<Void> addCartItem(@RequestBody CartItemAddRequestDto cartItemAddRequestDto, @AuthenticationPrincipal UserDetails loginUser){
 		cartService.addCartItem(cartItemAddRequestDto, loginUser.getUsername());
 		return ResponseDto.noContent();

src/main/java/com/teamA/hicardi/domain/cart/repository/CartRepository.java

@@ -8,6 +8,6 @@
 import com.teamA.hicardi.domain.member.entity.Member;
 
 public interface CartRepository extends JpaRepository<Cart, Long> {
-	Boolean existsCartByMember_Id(Long memberId);
-	Optional<Cart> findCartByMember_Id(Long memberId);
+	Boolean existsCartByMemberId(Long memberId);
+	Optional<Cart> findByMemberId(Long memberId);
 }

src/main/java/com/teamA/hicardi/domain/cart/service/CartService.java

@@ -17,6 +17,8 @@
 import com.teamA.hicardi.domain.item.repository.ItemRepository;
 import com.teamA.hicardi.domain.member.entity.Member;
 import com.teamA.hicardi.domain.member.repository.MemberRepository;
+import com.teamA.hicardi.error.ErrorCode;
+import com.teamA.hicardi.error.exception.custom.BusinessException;
 
 import lombok.RequiredArgsConstructor;
 
@@ -37,11 +39,11 @@ public class CartService {
 	public void addCartItem(CartItemAddRequestDto cartItemAddRequestDto, String userId) {
 
 		Member findMember =  memberRepository.findByUserId(userId)
-			.orElseThrow(() -> new IllegalArgumentException("존재하지 않는 회원입니다."));
+			.orElseThrow(() -> new BusinessException(ErrorCode.MEMBER_NOT_FOUND));
 
 		Long memberId = findMember.getId();
 
-		boolean existsCart = cartRepository.existsCartByMember_Id(memberId);
+		boolean existsCart = cartRepository.existsCartByMemberId(memberId);
 
 		// 장바구니가 존재하지 않을때 장바구니 생성
 		if(!existsCart){
@@ -52,17 +54,12 @@ public void addCartItem(CartItemAddRequestDto cartItemAddRequestDto, String user
 		}
 
 		// 해당 회원의 장바구니를 가져와서 상품을 추가
-		Cart findCart = cartRepository.findCartByMember_Id(memberId)
-			.orElseThrow(() -> new IllegalArgumentException("존재하지 않는 장바구니입니다."));
+		Cart findCart = cartRepository.findByMemberId(memberId)
+			.orElseThrow(() -> new BusinessException(ErrorCode.CART_NOT_FOUND));
+		Item findItem = itemRepository.findById(cartItemAddRequestDto.itemId())
+			.orElseThrow(() -> new BusinessException(ErrorCode.ITEM_NOT_FOUND));
 
-		Item findItem = itemRepository.findById(cartItemAddRequestDto.getItemId())
-			.orElseThrow(() -> new IllegalArgumentException("존재하지 않는 상품입니다."));
-
-		CartItem cartItem = CartItem.builder()
-			.cart(findCart)
-			.item(findItem)
-			.count(cartItemAddRequestDto.getCount())
-			.build();
+		CartItem cartItem = cartItemAddRequestDto.toEntity(findCart, findItem);
 
 		cartItemRepository.save(cartItem);
 	}

src/main/java/com/teamA/hicardi/domain/cartItem/dto/CartItemAddRequestDto.java

@@ -1,18 +1,15 @@
 package com.teamA.hicardi.domain.cartItem.dto;
 
-import lombok.Builder;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
+import com.teamA.hicardi.domain.cart.entity.Cart;
+import com.teamA.hicardi.domain.cartItem.entity.CartItem;
+import com.teamA.hicardi.domain.item.entity.Item;
 
-@Getter
-@NoArgsConstructor
-public class CartItemAddRequestDto {
-	private Long itemId;
-	private int count;
-
-	@Builder
-	public CartItemAddRequestDto(Long itemId, int count) {
-		this.itemId = itemId;
-		this.count = count;
+public record CartItemAddRequestDto (Long itemId, int count) {
+	public CartItem toEntity(Cart cart, Item item) {
+		return CartItem.builder()
+			.cart(cart)
+			.item(item)
+			.count(count)
+			.build();
 	}
 }

src/main/java/com/teamA/hicardi/error/ErrorCode.java

@@ -15,7 +15,9 @@ public enum ErrorCode {
     ALREADY_EXIST_EMAIL(BAD_REQUEST, "이미 존재하는 이메일입니다."),
     ALREADY_EXIST_USERID(BAD_REQUEST, "이미 존재하는 아이디입니다."),
     INVALID_FILE_UPLOAD(BAD_REQUEST, "파일 업로드에 실패하였습니다."),
-    INVALID_TOKEN(UNAUTHORIZED, "잘못된 토큰입니다.");
+    INVALID_TOKEN(UNAUTHORIZED, "잘못된 토큰입니다."),
+    CART_NOT_FOUND(NOT_FOUND, "해당 장바구니를 찾을 수 없습니다."),
+    ITEM_NOT_FOUND(NOT_FOUND, "해당 상품을 찾을 수 없습니다.");
 
 
     private final int code;

src/test/java/com/teamA/hicardi/domain/cart/controller/CartControllerTest.java

@@ -20,7 +20,9 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.teamA.hicardi.domain.cart.service.CartService;
 import com.teamA.hicardi.domain.cartItem.dto.CartItemAddRequestDto;
-import com.teamA.hicardi.domain.utils.TestUserArgumentResolver;
+import com.teamA.hicardi.domain.item.entity.Item;
+import com.teamA.hicardi.domain.item.entity.SellStatus;
+import com.teamA.hicardi.utils.TestUserArgumentResolver;
 
 @ExtendWith(MockitoExtension.class)
 class CartControllerTest {
@@ -45,10 +47,8 @@ void setUp() {
 	@Test
 	@DisplayName("장바구니 상품 추가 성공")
 	void cartItemAddSuccess() throws Exception {
-		CartItemAddRequestDto cartItemAddRequestDto = CartItemAddRequestDto.builder()
-			.itemId(1L)
-			.count(1)
-			.build();
+
+		CartItemAddRequestDto cartItemAddRequestDto = new CartItemAddRequestDto(1L,  1);
 
 		ResultActions result = mockMvc.perform(MockMvcRequestBuilders.post("/api/cart/add")
 				.contentType(MediaType.APPLICATION_JSON)

src/test/java/com/teamA/hicardi/domain/utils/TestUserArgumentResolver.java → src/test/java/com/teamA/hicardi/utils/TestUserArgumentResolver.java

@@ -1,4 +1,4 @@
-package com.teamA.hicardi.domain.utils;
+package com.teamA.hicardi.utils;
 
 import static org.mockito.BDDMockito.*;