[FEAT] CG-01 #9

backend/src/main/java/com/backend/category/controller/CategoryController.java

@@ -0,0 +1,25 @@
+package com.backend.category.controller;
+
+import com.backend.category.dto.CategoryDto;
+import com.backend.category.service.CategoryService;
+import com.backend.global.response.GenericResponse;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1/category")
+@RequiredArgsConstructor
+public class CategoryController {
+
+    private final CategoryService categoryService;
+
+    // 카테고리 전체 조회
+    @GetMapping
+    public GenericResponse<List<CategoryDto>> getAllCategory() {
+        List<CategoryDto> categorieList = categoryService.categoryList();
+        return GenericResponse.of(true, "200", categorieList);
+    }
+}

backend/src/main/java/com/backend/category/dto/CategoryDto.java

@@ -0,0 +1,18 @@
+package com.backend.category.dto;
+
+import java.time.LocalDateTime;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Builder
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+public class CategoryDto {
+    private Long id;
+    private String name;
+    private LocalDateTime createdAt;
+    private LocalDateTime modifiedAt;
+}

backend/src/main/java/com/backend/category/entity/Category.java

@@ -0,0 +1,51 @@
+package com.backend.category.entity;
+
+import com.backend.global.baseentity.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.validation.constraints.Size;
+import java.util.Objects;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Builder
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor
+public class Category extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    @Size(max = 25)
+    private String name;
+
+    // category 객체의 값이 동일한지 비교하는 메서드
+    // 테스트 중 에러가 발생해서 추가한 메서드
+    // 예상 결과와 실제 결과를 비교할 때 사용
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+        if (o == null || getClass() != o.getClass())
+            return false;
+        Category category = (Category) o;
+        return Objects.equals(id, category.id) && Objects.equals(name, category.name);
+    }
+
+    // equals() 메서드와 함께 사용되는 hashCode() 메서드
+    // 이 메서드에서 비교하는 필드들을 기반으로 hashCode 값을 계산, 객체 비교의 일관성을 유지
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, name);
+    }
+}

backend/src/main/java/com/backend/category/repository/CategoryRepository.java

@@ -0,0 +1,8 @@
+package com.backend.category.repository;
+
+import com.backend.category.entity.Category;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CategoryRepository extends JpaRepository<Category, Long> {
+
+}

backend/src/main/java/com/backend/category/service/CategoryService.java

@@ -0,0 +1,34 @@
+package com.backend.category.service;
+
+import com.backend.category.dto.CategoryDto;
+import com.backend.category.entity.Category;
+import com.backend.category.repository.CategoryRepository;
+import java.util.List;
+import java.util.stream.Collectors;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class CategoryService {
+
+    private final CategoryRepository categoryRepository;
+
+    // 카테고리 전체 조회
+    public List<CategoryDto> categoryList() {
+        List<Category> categoryList = categoryRepository.findAll();
+        return mappingCategory(categoryList);
+    }
+
+    // 카테고리 매핑
+    public List<CategoryDto> mappingCategory(List<Category> categoryList) {
+        return categoryList.stream()
+                .map(category -> CategoryDto.builder()
+                        .id(category.getId())
+                        .name(category.getName())
+                        .createdAt(category.getCreatedAt().toLocalDateTime())
+                        .modifiedAt(category.getModifiedAt().toLocalDateTime())
+                        .build())
+                .collect(Collectors.toList());
+    }
+}

backend/src/test/java/com/backend/CategoryControllerTest.java

@@ -0,0 +1,50 @@
+package com.backend;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.backend.category.dto.CategoryDto;
+import com.backend.category.entity.Category;
+import com.backend.category.repository.CategoryRepository;
+import com.backend.category.service.CategoryService;
+import java.util.List;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+public class CategoryControllerTest {
+
+    @Autowired
+    private CategoryRepository categoryRepository; // Repository 주입
+
+    @Autowired
+    private CategoryService categoryService;
+
+    @BeforeEach
+    void setup() {
+        // 테스트 데이터를 사전에 삽입
+        categoryRepository.save(Category.builder()
+                .name("Category 1")
+                .build());
+
+        categoryRepository.save(Category.builder()
+                .name("Category 2")
+                .build());
+    }
+
+    @Test
+    void testCategoryList_shouldReturnCategoryDtos() {
+        // 카테고리 전체 조회 (DTO 반환)
+        List<CategoryDto> categoryDtos = categoryService.categoryList();
+
+        // 카테고리 전체 조회 결과가 2개인지 확인
+        assertThat(categoryDtos.size()).isEqualTo(2);
+
+        // 첫 번째 카테고리 DTO의 name이 "Category 1"인지 확인
+        assertThat(categoryDtos.get(0).getName()).isEqualTo("Category 1");
+
+        // 두 번째 카테고리 DTO의 name이 "Category 2"인지 확인
+        assertThat(categoryDtos.get(1).getName()).isEqualTo("Category 2");
+    }
+}