@Transactional(readOnly = true)
    public ArticleResponse readArticle(Long id) {
        Article article = articleRepository.getById(id);
        return ArticleResponse.from(article);
    }
@DisplayName("아티클 조회 성공")
    @Test
    void readArticle() {
        // given
        articleRepository.save(ARTICLE);

        // when & then
        assertThatCode(() -> articleService.readArticle(ARTICLE.getId()))
                .doesNotThrowAnyException();
    }