test: follow 테스트 수정

유저 2명이 존재하고 팔로우를 안해서 실패하면
FollowNotFoundException

Author: sapiens2000

src/test/java/com/example/log4u/domain/follow/FollowTest.java

@@ -68,7 +68,7 @@ void deleteFollowSuccess() {
 		Long userId = saveOneFollow();
 
 		followService.deleteFollow(userId, TARGET);
-		
+
 		assertThrows(FollowNotFoundException.class,
 			() -> followService.deleteFollow(userId, TARGET));
 	}
@@ -81,8 +81,11 @@ void deleteFollowFailureWithFollowNotFound() {
 		user = userRepository.save(user);
 		final Long userId = user.getUserId();
 
+		User target = UserFixture.createUserFixtureWithNickname(TARGET);
+		userRepository.save(target);
+
 		assertThrows(FollowNotFoundException.class,
-			() -> followService.deleteFollow(userId, WRONG_TARGET));
+			() -> followService.deleteFollow(userId, TARGET));
 	}
 
 	private Long saveOneFollow() {