How to make unit test with exception using JUnit5?-CodePudding

I have UserService and there GET method which returns the object found by id. Let's say:

@Service
public class UserService {

    @Autowired
    UserRepository repository;

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

I made simple test if the user is found:

@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());
    }
}

Now I want to make a method, let's say: public void shouldThrowExceptionWhenUserDoesntExist(). How to make it in JUnit5? In JUnit4 I would make something like this:

    @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());
    }

Since this @Test(expected = UserNotFoundException.class) is outdated in JUnit5, I can't find anywhere what's the way in handling exception like this one in JUnit5.

CodePudding user response：

Do like this

Assertions.assertThrows(UserNotFoundException.class, () -> {
    userService.getUserById(1234);
});