我有UserService和GET方法，它返回id找到的对象。

@Service
public class UserService {

    @Autowired
    UserRepository repository;

    public User getUserById(Long id) {
        return repository.findById(id)
                .orElseThrow(() -> new UserNotFoundException(id));
    }
}

我做了简单的测试如果用户发现：

@ExtendWith(MockitoExtension.class)
class  UserServiceTest {

    @Mock
    private UserRepository userRepository;

    @InjectMocks
    private UserService userService;

    @Test
    public void whenGivenId_shouldReturnUser_ifFound() {
        User user = new User();
        user.setId(89L);

        when(userRepository.findById(user.getId())).thenReturn(Optional.of(user));

        User expected = userService.getUserById(user.getId());

        assertThat(expected).isSameAs(user);
        verify(userRepository).findById(user.getId());
    }
}

现在我想作一个方法，让我们说：public void shouldThrowExceptionWhenUserDoesntExist()。如何在JUnit5中制作它？在JUnit4中，我会制作如下内容：

@Test(expected = UserNotFoundException.class)
    public void shouldThrowExceptionWhenUserDoesntExist() {
        User user = new User();
        user.setId(89L);
        user.setName("Test Name");

        given(userRepository.findById(anyLong())).willReturn(Optional.ofNullable(null));
        userService.getUserById(user.getId());
    }

由于此@Test(expected = UserNotFoundException.class)在JUnit5中已过时，因此我在任何地方都找不到处理JUnit5中此类异常的方法。