### Question:
CategoryService { public void deleteCategoryByIds(List<String> categoryIds) { categoryDao.deleteBatch(categoryIds); } CategoryService(CategoryDao categoryDao, ArticleDao articleDao, CategoryMapper categoryMapper); Page<CategoryDto> findCategoryByCondition(CategoryDto categoryDto, Pageable pageable); CategoryDto findCategoryById(String categoryId); void saveOrUpdate(CategoryDto categoryDto); void deleteCategoryByIds(List<String> categoryIds);  }### Answer:
@Test void testDeleteCategoryByIds() { categoryService.deleteCategoryByIds(Arrays.<String>asList("String")); }