### Question:
CategoryServiceImpl implements CategoryService { @Override public List<CategoryDto> findAll() { List<String> categoryStrings = categoryRepository.findAllConcatenatedCategory(); return categoryStrings.stream() .map(string -> new CategoryDto(Categories.fromCategory(string))) .collect(Collectors.toList()); }  @Override List<CategoryDto> findAll(); @Override List<CategoryDto> search(String keyword);  }### Answer:
@Test public void testFindAll() throws Exception { System.out.println(categoryService.findAll()); }