@Autowired
    CategoryRepository categoryRepository;

    @FlywayTest
    @Test
    public void when_save_user_it_should_return_user() {
        Category category = new Category();
        category.setName("name");
        category.setParentId(15L);

        when(categoryRepository.save(any(Category.class))).thenReturn(new Category());

        Category created = categoryRepository.save(category);

        assertThat(created.getName()).isSameAs(category.getName());
    }