@Test
  public void testRemoveArticle() throws Exception {

    MessageResponseServiceImpl mrs = new MessageResponseServiceImpl();

    // Successful case
    mrs.setMessageResponse(new MessageResponse());
    articleService.setMessageResponseService(mrs);

    Article articleSuccess = new Article();
    articleSuccess.setTitle("test success");
    articleSuccess.setDeleted(true);

    Mockito.when(articleDao.removeArticle(articleSuccess)).thenReturn(articleSuccess);

    MessageResponse messageSuccess = articleService.removeArticle(articleSuccess);

    // Fail case
    mrs.setMessageResponse(new MessageResponse());
    articleService.setMessageResponseService(mrs);

    Article articleFail = new Article();
    articleFail.setTitle("test fail");
    articleFail.setDeleted(false);

    Mockito.when(articleDao.removeArticle(articleFail)).thenReturn(articleFail);

    MessageResponse messageFail = articleService.removeArticle(articleFail);

    Assert.assertTrue(messageSuccess.getCode() == 1 && messageFail.getCode() == 0);
  }
  @Test
  @PrepareForTest({UtilsHibernate.class})
  public void testGetArticles() throws Exception {

    PowerMockito.mockStatic(UtilsHibernate.class);

    List<Article> articleList = new ArrayList<>();

    Article article1 = new Article();
    article1.setTitle("article1");
    articleList.add(article1);

    Article article2 = new Article();
    article2.setTitle("article2");
    articleList.add(article2);

    Mockito.when(
            articleDao.getAllArticles(
                2, 1, UtilsHibernate.getOrderByString("asc", "title"), "title", 1))
        .thenReturn(articleList);

    List<Article> articles = articleService.getArticles(2, 1, "asc", "title", 1);

    Assert.assertTrue(
        articles.get(0).getTitle().equals("article1")
            && articles.get(1).getTitle().equals("article2"));
  }
  @Test
  public void testUpdateArticle() throws Exception {

    Article article = new Article();
    article.setTitle("test");

    Mockito.when(articleDao.updateArticle(article)).thenReturn(article);

    Article articleResult = articleService.updateArticle(article);

    Assert.assertEquals(articleResult, article);
  }
  @Test
  public void testGetArticle() throws Exception {

    Article article = new Article();
    article.setArticleId(1);
    article.setTitle("test title");

    Mockito.when(articleDao.getArticle(article)).thenReturn(article);

    Article responseArticle = articleService.getArticle(article);

    Assert.assertEquals(article.getArticleId(), responseArticle.getArticleId());
  }
  @Test
  public void testGetArticlesByUser() throws Exception {

    Article article = new Article();
    article.setArticleId(1);
    article.setTitle("test title");

    List<Article> articles = new ArrayList<>();
    articles.add(article);

    Mockito.when(articleDao.getArticlesByUserOwner(user)).thenReturn(articles);

    List<Article> responseArticles = articleService.getArticlesByUser(user);

    Assert.assertEquals(responseArticles.get(0).getArticleId(), 1);
  }