[Test]: 게시글 조회 테스트 구현

Author: shihan00321

back/src/test/java/com/back/domain/post/controller/PostControllerTest.java

@@ -1,6 +1,7 @@
 package com.back.domain.post.controller;
 
 import com.back.domain.post.dto.PostRequest;
+import com.back.domain.post.dto.PostResponse;
 import com.back.domain.post.entity.Post;
 import com.back.domain.post.enums.PostCategory;
 import com.back.domain.post.repository.PostRepository;
@@ -18,14 +19,18 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDateTime;
+import java.util.stream.IntStream;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
@@ -61,6 +66,17 @@ void setUp() {
                 .birthdayAt(LocalDateTime.of(2000, 3, 1, 0, 0))
                 .build();
         userRepository.save(testUser);
+
+        IntStream.rangeClosed(1, 5).forEach(i -> {
+            postRepository.save(
+                    Post.builder()
+                            .title("목록 게시글 " + i)
+                            .content("목록 내용 " + i)
+                            .category(PostCategory.CHAT)
+                            .user(testUser)
+                            .build()
+            );
+        });
     }
 
     @Nested
@@ -73,16 +89,20 @@ void success() throws Exception {
             // given
             PostRequest request = new PostRequest("테스트 게시글", "테스트 내용입니다.", PostCategory.CHAT);
 
-            // when & then
-            mockMvc.perform(post("/api/v1/posts")
+            // when
+            MvcResult result = mockMvc.perform(post("/api/v1/posts")
                             .contentType(MediaType.APPLICATION_JSON)
                             .content(objectMapper.writeValueAsString(request)))
                     .andExpect(status().isCreated())
                     .andExpect(jsonPath("$.title").value("테스트 게시글"))
                     .andExpect(jsonPath("$.content").value("테스트 내용입니다."))
-                    .andExpect(jsonPath("$.category").value("CHAT"));
+                    .andExpect(jsonPath("$.category").value("CHAT"))
+                    .andReturn();
 
-            Post savedPost = postRepository.findAll().get(0);
+            String responseBody = result.getResponse().getContentAsString();
+            PostResponse response = objectMapper.readValue(responseBody, PostResponse.class);
+
+            Post savedPost = postRepository.findById(response.id()).orElseThrow();
             assertThat(savedPost.getTitle()).isEqualTo("테스트 게시글");
             assertThat(savedPost.getContent()).isEqualTo("테스트 내용입니다.");
             assertThat(savedPost.getCategory()).isEqualTo(PostCategory.CHAT);
@@ -103,4 +123,58 @@ void fail_ValidationError() throws Exception {
                     .andExpect(jsonPath("$.message").exists());
         }
     }
+
+    @Nested
+    @DisplayName("게시글 조회")
+    class GetPost {
+
+        @Test
+        @DisplayName("성공 - 존재하는 게시글 조회")
+        void success() throws Exception {
+            // given
+            Post savedPost = postRepository.save(
+                    Post.builder()
+                            .title("조회 테스트 게시글")
+                            .content("조회 테스트 내용입니다.")
+                            .category(PostCategory.CHAT)
+                            .user(userRepository.findAll().get(0))
+                            .build()
+            );
+
+            // when & then
+            mockMvc.perform(get("/api/v1/posts/{postId}", savedPost.getId()))
+                    .andExpect(status().isOk())
+                    .andExpect(jsonPath("$.title").value("조회 테스트 게시글"))
+                    .andExpect(jsonPath("$.content").value("조회 테스트 내용입니다."))
+                    .andExpect(jsonPath("$.category").value("CHAT"));
+        }
+
+        @Test
+        @DisplayName("실패 - 존재하지 않는 게시글 ID")
+        void fail_NotFound() throws Exception {
+            // when & then
+            mockMvc.perform(get("/api/v1/posts/{postId}", 9999L))
+                    .andExpect(status().isNotFound())
+                    .andExpect(jsonPath("$.status").value(HttpStatus.NOT_FOUND.value()))
+                    .andExpect(jsonPath("$.code").value(ErrorCode.POST_NOT_FOUND.getCode()))
+                    .andExpect(jsonPath("$.message").value(ErrorCode.POST_NOT_FOUND.getMessage()))
+                    .andExpect(jsonPath("$.path").value("/api/v1/posts/9999"));
+        }
+    }
+
+    @Nested
+    @DisplayName("게시글 목록 조회")
+    class GetPosts {
+
+        @Test
+        @DisplayName("성공 - 게시글 목록 조회")
+        void success() throws Exception {
+            // when & then
+            mockMvc.perform(get("/api/v1/posts"))
+                    .andExpect(status().isOk())
+                    .andExpect(jsonPath("$.length()").value(5))
+                    .andExpect(jsonPath("$[0].title").value("목록 게시글 1"))
+                    .andExpect(jsonPath("$[1].title").value("목록 게시글 2"));
+        }
+    }
 }