feat: topic service -> facade 테스트 코드 리펙토링

- describe context it 패턴 적용
- topicServiceTest -> topicFacadeTest로 변경
- facade pattern에 맞게 수정

src/test/java/com/genius/gitget/admin/topic/repository/TopicRepositoryTest.java

@@ -48,7 +48,7 @@ public void setup() {
     }
 
     @Nested
-    @DisplayName("save 메소드는")
+    @DisplayName("save 메서드는")
     class Describe_save {
 
         @BeforeEach
@@ -75,7 +75,7 @@ public void it_returns_the_saved_obj_if_saving_an_obj_succeeds() {
 
 
     @Nested
-    @DisplayName("search 메소드는")
+    @DisplayName("search 메서드는")
     class Describe_search {
 
         @Nested
@@ -129,7 +129,7 @@ public void init() {
 
             @Test
             @DisplayName("생성된 인스턴스가 존재하면 description만 수정할 수 있고, 없다면 모든 항목을 수정할 수 있다.")
-            public void it_returns_2XX_if_the_obj_is_updated_successfully() {
+            public void it_returns_updated_obj() {
 
                 Topic topic = topicRepository.findById(topicA.getId()).orElse(null);
 

src/test/java/com/genius/gitget/admin/topic/service/TopicFacadeTest.java

@@ -0,0 +1,135 @@
+package com.genius.gitget.admin.topic.service;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.genius.gitget.global.util.exception.BusinessException;
+import com.genius.gitget.topic.domain.Topic;
+import com.genius.gitget.topic.dto.TopicCreateRequest;
+import com.genius.gitget.topic.dto.TopicDetailResponse;
+import com.genius.gitget.topic.dto.TopicUpdateRequest;
+import com.genius.gitget.topic.serviceFacade.TopicFacade;
+import jakarta.transaction.Transactional;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
+
+@SpringBootTest
+@Transactional
+@Rollback
+public class TopicFacadeTest {
+    Topic topicA, topicB;
+    String fileType;
+
+    @Autowired
+    TopicFacade topicFacade;
+
+    @BeforeEach
+    public void setup() {
+        topicA = Topic.builder()
+                .title("1일 1알고리즘")
+                .description("하루에 한 문제씩 문제를 해결합니다.")
+                .tags("BE, FE, CS")
+                .pointPerPerson(100)
+                .build();
+
+        topicB = Topic.builder()
+                .title("1일 2알고리즘")
+                .description("하루에 한 문제씩 문제를 해결합니다.")
+                .tags("BE, FE, CS")
+                .pointPerPerson(300)
+                .build();
+
+        fileType = "topic";
+    }
+
+    private TopicCreateRequest getTopicCreateRequest() {
+        return TopicCreateRequest.builder()
+                .title(topicA.getTitle())
+                .description(topicA.getDescription())
+                .tags(topicA.getTags())
+                .pointPerPerson(topicA.getPointPerPerson())
+                .notice(topicA.getNotice())
+                .build();
+    }
+
+    @Nested
+    @DisplayName("토픽 생성 메서드는")
+    class Describe_topic_create {
+
+        @Nested
+        @DisplayName("topicCreateRequestDto가 들어오면")
+        class Context_with_a_topicCreateRequestDto {
+
+            @Test
+            @DisplayName("토픽을 생성한다.")
+            public void it_returns_2XX_if_the_topic_was_created_successfully() {
+                TopicCreateRequest topicCreateRequest = getTopicCreateRequest();
+
+                Long savedTopicId = topicFacade.create(topicCreateRequest);
+
+                TopicDetailResponse topicById = topicFacade.findOne(savedTopicId);
+
+                Assertions.assertThat(topicById.title()).isEqualTo(topicCreateRequest.title());
+            }
+        }
+    }
+
+    @Nested
+    @DisplayName("토픽 수정 메서드는")
+    class Describe_topic_update {
+
+        @Nested
+        @DisplayName("TopicUpdateRequestDto가 들어오면")
+        class Context_with_a_TopicUpdateRequestDto {
+
+            @Test
+            @DisplayName("토픽 내용을 수정한다.")
+            public void it_returns_2XX_if_the_topic_is_modified() {
+                TopicCreateRequest topicCreateRequest = getTopicCreateRequest();
+                Long savedTopicId = topicFacade.create(topicCreateRequest);
+
+                TopicUpdateRequest topicUpdateRequest = TopicUpdateRequest.builder()
+                        .title("1일 5커밋")
+                        .description(topicA.getDescription())
+                        .tags(topicA.getTags())
+                        .pointPerPerson(topicA.getPointPerPerson())
+                        .notice(topicA.getNotice()).build();
+
+                topicFacade.update(savedTopicId, topicUpdateRequest);
+
+                TopicDetailResponse findTopic = topicFacade.findOne(savedTopicId);
+                Assertions.assertThat(findTopic.title()).isEqualTo("1일 5커밋");
+            }
+        }
+    }
+
+    @Nested
+    @DisplayName("토픽 삭제 메서드는")
+    class Describe_topic_delete {
+
+        @Nested
+        @DisplayName("삭제할 토픽 Id가 주어질 때")
+        class Context_with_a_TopicUpdateRequestDto {
+
+            @Test
+            @DisplayName("해당 토픽을 삭제한다.")
+            public void it_returns_2XX_if_the_topic_is_successfully_deleted() throws Exception {
+                TopicCreateRequest topicCreateRequest = getTopicCreateRequest();
+                Long savedTopicId = topicFacade.create(topicCreateRequest);
+
+                topicFacade.delete(savedTopicId);
+
+                try {
+                    topicFacade.findOne(savedTopicId);
+                } catch (BusinessException e) {
+                    assertEquals("해당 토픽을 찾을 수 없습니다.", e.getMessage());
+                }
+            }
+        }
+    }
+}