I am trying to do a unit test into the service layer with Mockito, JUnit 5 and Spring Boot but I get-CodePudding

I am trying to do a unit test into the service layer with Mockito, JUnit 5 and Spring Boot but I get NullPointerException.

This is my test class:

class UserServiceTest {

@Mock
UserRepository userRepository;

@InjectMocks
IUserService userService;

UserMapper userMapper;

@Test
void when_save_user_it_should_return_user(){
    UserRequest userRequest = UserRequest.builder()
            .email("[email protected]")
            .password("123456")
            .firstName("Pedro")
            .lastName("Perez")
            .birthDate(LocalDateTime.now())
            .imageUrl("")
            .currency("170")
            .build();
    Mockito.when(userRepository.save(Mockito.any(UserEntity.class))).thenReturn(new UserEntity());
    UserEntity createdUser = userService.createUser(userRequest);


    assertThat(createdUser.getFirstName()).isSameAs(userRequest.getFirstName());
}

}

And this is my response:

java.lang.NullPointerException
at com.jhapdevelopment.moneyhub.usermicroservice.services.implementations.UserServiceTest.when_save_user_it_should_return_user(UserServiceTest.java:41)

I don't understand why I get this response, I mean maybe Is it possible that be a problem with dependency

CodePudding user response：

I guess mocking does not injecting correctly.

For JUnit 5, you must use @ExtendWith(MockitoExtension.class) on top of the class.

CodePudding user response：

@InjectMocks IUserService userService -> replace with UserServiceImpl