Testing Service Layer

Pragya Keshap answered on February 28, 2023 Popularity 1/10 Helpfulness 1/10

answer Testing Service Layer

Testing Service Layer

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@Mock annotation creates a mock implementation for the class it is annotated with.

@InjectMocks also creates the mock implementation, additionally injects the dependent mocks that are marked with the annotations @Mock into it.

In UserServiceTest we are mocking UserRespository which means we don’t care about how the repository layer works. As the dependencies are mocked, we have to define how the method calls to the mocked object should behave, we can do that by using the method call chain Mockito.when().thenReturn()

@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();
    }
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java service-layer testing

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Contributed on Feb 28 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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