@Transactional
    public long createArticle(ArticleCreateRequest request) {
        Article article = request.toEntity();
        articleRepository.save(article);
        return article.getId();
    }
@DisplayName("아티클 생성 성공")
    @Test
    void createArticle() {
        // given
        ArticleCreateRequest request = ARTICLE_CREATE_REQUEST;

        // when
        Long articleId = articleService.createArticle(request);

        // then
        assertThat(articleRepository.getById(articleId).getTitle())
                .isEqualTo(ARTICLE_CREATE_REQUEST.title());
    }