@ExtendWith(SpringExtension.class)

public class UserServiceTest {

​

    @InjectMocks

    private UserServiceImpl userService;

​

    @Mock

    private UserRepository userRepository;

    private String TEST_EMAIL = "test@gmail.com";

​

    @Test

    public void shouldGetUser() {

        User user = User.builder()

                .id("id")

                .firstName("firstName")

                .lastName("lastName")

                .phone("phone")

                .email(TEST_EMAIL)

                .role(UserRoles.ADMIN)

                .password("password")

                .active(false)

                .build();

        when(userRepository.findUserByEmail(TEST_EMAIL)).thenReturn(Mono.just(user));

        Mono<UserDto> userMono = userService.getUser(TEST_EMAIL);

        StepVerifier

                .create(userMono)

                .consumeNextWith(newUser -> {

                    assertEquals(newUser.getEmail(), TEST_EMAIL);

                })

                .verifyComplete();

    }

​

    @Test

    public void shouldGetUserNotFound() {

        when(userRepository.findUserByEmail(TEST_EMAIL)).thenReturn(Mono.empty());

        Mono<UserDto> userMono = userService.getUser(TEST_EMAIL);

        StepVerifier

                .create(userMono)

                .expectErrorMatches(throwable -> throwable instanceof UserNotFoundException)

                .verify();

    }

}