[feat] 작곡가 삭제 API 추가

src/main/java/com/daramg/server/composer/application/ComposerService.java

@@ -55,6 +55,15 @@ public void createComposer(ComposerCreateDto dto, User user) {
      * @param user       요청한 유저 (인증 객체)
      * @return 좋아요 생성 시 {@code true}, 취소 시 {@code false}를 담은 DTO
      */
+    @Transactional
+    public void deleteComposer(Long composerId, User user) {
+        if (user.getId() != 5L) {
+            throw new BusinessException(CommonErrorStatus.FORBIDDEN);
+        }
+        Composer composer = entityUtils.getEntity(composerId, Composer.class);
+        composerRepository.delete(composer);
+    }
+
     @Transactional
     public ComposerLikeResponseDto toggleLike(Long composerId, User user) {
         Composer composer = entityUtils.getEntity(composerId, Composer.class);

src/main/java/com/daramg/server/composer/presentation/ComposerController.java

@@ -23,6 +23,12 @@ public void createComposer(@Valid @RequestBody ComposerCreateDto dto, User user)
         composerService.createComposer(dto, user);
     }
 
+    @DeleteMapping("/{composerId}")
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    public void deleteComposer(@PathVariable Long composerId, User user) {
+        composerService.deleteComposer(composerId, user);
+    }
+
     @PostMapping("/{composerId}/like")
     public ResponseEntity<ComposerLikeResponseDto> toggleComposerLike(@PathVariable Long composerId, User user) {
         ComposerLikeResponseDto response = composerService.toggleLike(composerId, user);

src/test/java/com/daramg/server/composer/presentation/ComposerControllerTest.java

@@ -18,6 +18,7 @@
 import static org.springframework.restdocs.cookies.CookieDocumentation.requestCookies;
 import static org.springframework.restdocs.payload.PayloadDocumentation.fieldWithPath;
 import static org.springframework.restdocs.request.RequestDocumentation.parameterWithName;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
@@ -76,6 +77,35 @@ public class ComposerControllerTest extends ControllerTestSupport {
                 ));
     }
 
+    @Test
+    void 작곡가를_삭제한다() throws Exception {
+        // given
+        Long composerId = 1L;
+        Cookie cookie = new Cookie(COOKIE_NAME, "access_token");
+
+        // when
+        ResultActions result = mockMvc.perform(delete("/composers/{composerId}", composerId)
+                .cookie(cookie)
+        );
+
+        // then
+        result.andExpect(status().isNoContent())
+                .andDo(restDocsHandler.document(
+                        resource(ResourceSnippetParameters.builder()
+                                .tag("Composer API")
+                                .summary("작곡가 삭제")
+                                .description("관리자가 작곡가를 삭제합니다.")
+                                .pathParameters(
+                                        parameterWithName("composerId").description("삭제할 작곡가 ID")
+                                )
+                                .build()
+                        ),
+                        requestCookies(
+                                cookieWithName(COOKIE_NAME).description("유저의 토큰")
+                        )
+                ));
+    }
+
     @Test
     void 작곡가_좋아요를_토글한다() throws Exception {
         // given