refactor : 타유저 그룹 목록 조회 시 path variable 수정 (#203)

* refactor : 닉네임을 사용한 path variable로 수정

* test : 테스트 수정

src/main/java/com/gamzabat/algohub/feature/group/studygroup/controller/StudyGroupController.java

@@ -178,11 +178,11 @@ public ResponseEntity<Void> editStudyGroupVisibility(@AuthedUser User user,
 		return ResponseEntity.ok().build();
 	}
 
-	@GetMapping(value = "/users/{userId}/groups")
+	@GetMapping(value = "/users/{userNickname}/groups")
 	@Operation(summary = "타 유저 그룹 목록 조회 API", description = "유저가 보이도록 설정해놓은 유저가 참여하고 있는 그룹 모두 조회")
 	public ResponseEntity<GetStudyGroupListsResponse> getOtherUserStudyGroupList(@AuthedUser User user,
-		@PathVariable Long userId) {
-		GetStudyGroupListsResponse response = studyGroupService.getOtherStudyGroupList(userId);
+		@PathVariable String userNickname) {
+		GetStudyGroupListsResponse response = studyGroupService.getOtherStudyGroupList(userNickname);
 		return ResponseEntity.ok().body(response);
 	}
 }

src/main/java/com/gamzabat/algohub/feature/group/studygroup/service/StudyGroupService.java

@@ -500,8 +500,8 @@ public void editStudyGroupVisibility(User user, Long groupId, EditGroupVisibilit
 	}
 
 	@Transactional(readOnly = true)
-	public GetStudyGroupListsResponse getOtherStudyGroupList(Long targetUserId) {
-		User targetUser = userRepository.findById(targetUserId)
+	public GetStudyGroupListsResponse getOtherStudyGroupList(String userNickname) {
+		User targetUser = userRepository.findByNickname(userNickname)
 			.orElseThrow(() -> new CannotFoundUserException(HttpStatus.NOT_FOUND.value(), "존재하지 않는 유저입니다."));
 		List<StudyGroup> groups = groupRepository.findAllByUser(targetUser);
 

src/main/java/com/gamzabat/algohub/feature/user/repository/UserRepository.java

@@ -20,4 +20,6 @@ public interface UserRepository extends JpaRepository<User, Long> {
 	boolean existsByBjNickname(String bjNickname);
 
 	boolean existsByNickname(String nickname);
+
+	Optional<User> findByNickname(String userNickname);
 }

src/test/java/com/gamzabat/algohub/service/StudyGroupServiceTest.java

@@ -802,10 +802,10 @@ void getOtherUserGroupList() {
 		}
 		when(bookmarkedStudyGroupRepository.findAllByUser(user)).thenReturn(bookmarks);
 		when(studyGroupRepository.findAllByUser(user)).thenReturn(groups);
-		when(userRepository.findById(user.getId())).thenReturn(Optional.of(user));
+		when(userRepository.findByNickname(user.getNickname())).thenReturn(Optional.of(user));
 		when(studyGroupRepository.findAllByUser(user)).thenReturn(groups);
 		// when
-		GetStudyGroupListsResponse result = studyGroupService.getOtherStudyGroupList(user.getId());
+		GetStudyGroupListsResponse result = studyGroupService.getOtherStudyGroupList(user.getNickname());
 		// then
 		List<GetStudyGroupResponse> bookmarked = result.getBookmarked();
 		List<GetStudyGroupResponse> done = result.getDone();