Mock 객체 만들기

https://github.com/keesun/inflearn-the-java-test

 

위에 github 저장소에 들어가 history를 아래 순서와 같이 history가 쌓여 있다.

 

 

 

이중 Prepare Mockito example를 import를 받고 실행하면 아래와같이 import가 된다.(test부분은 삭제했음)

 

 

 

방법1. 아무것도 사용안할 시 테스트하는 방법

StudyService class를 테스트하기위해서는 아래와 같이 구현하여 테스트를 해야 한다.

 

하지만 아래와 같이 구현체를 직접 구현해서 사용해야하는 번거로움이 있다.

import static org.junit.Assert.assertNotNull;

import java.util.List;
import java.util.Optional;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.test.context.ActiveProfiles;
import org.testcontainers.junit.jupiter.Testcontainers;

import lombok.extern.slf4j.Slf4j;
import me.whiteship.inflearnthejavatest.domain.Member;
import me.whiteship.inflearnthejavatest.domain.Study;
import me.whiteship.inflearnthejavatest.member.MemberService;

class StudyServiceTest {
	
	@Test
	void createStudyService() {
		MemberService memberService = new MemberService() {
			@Override
			public Optional<Member> findById(Long memberId) {
				// TODO Auto-generated method stub
				return null;
			}

			@Override
			public void validate(Long memberId) {
				// TODO Auto-generated method stub
				
			}

			@Override
			public void notify(Study newstudy) {
				// TODO Auto-generated method stub
				
			}

			@Override
			public void notify(Member member) {
				// TODO Auto-generated method stub
				
			}
		};
		StudyRepository studyRepository = new StudyRepository() {
			
			@Override
			public <S extends Study> Optional<S> findOne(Example<S> example) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public <S extends Study> Page<S> findAll(Example<S> example, Pageable pageable) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public <S extends Study> boolean exists(Example<S> example) {
				// TODO Auto-generated method stub
				return false;
			}
			
			@Override
			public <S extends Study> long count(Example<S> example) {
				// TODO Auto-generated method stub
				return 0;
			}
			
			@Override
			public <S extends Study> S save(S entity) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public Optional<Study> findById(Long id) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public boolean existsById(Long id) {
				// TODO Auto-generated method stub
				return false;
			}
			
			@Override
			public void deleteById(Long id) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void deleteAll(Iterable<? extends Study> entities) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void deleteAll() {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void delete(Study entity) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public long count() {
				// TODO Auto-generated method stub
				return 0;
			}
			
			@Override
			public Page<Study> findAll(Pageable pageable) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public <S extends Study> S saveAndFlush(S entity) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public <S extends Study> List<S> saveAll(Iterable<S> entities) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public Study getOne(Long id) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public void flush() {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public List<Study> findAllById(Iterable<Long> ids) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public <S extends Study> List<S> findAll(Example<S> example, Sort sort) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public <S extends Study> List<S> findAll(Example<S> example) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public List<Study> findAll(Sort sort) {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public List<Study> findAll() {
				// TODO Auto-generated method stub
				return null;
			}
			
			@Override
			public void deleteInBatch(Iterable<Study> entities) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void deleteAllInBatch() {
				// TODO Auto-generated method stub
				
			}
		};
		
		StudyService studyService = new StudyService(memberService, studyRepository);
		
		assertNotNull(studyService);
	}
}

 

 

방법2. Mockito.mock()사용할 시

import static org.junit.Assert.assertNotNull;
import static org.mockito.Mockito.mock;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mockito;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ActiveProfiles;
import org.testcontainers.junit.jupiter.Testcontainers;

import lombok.extern.slf4j.Slf4j;
import me.whiteship.inflearnthejavatest.member.MemberService;

class StudyServiceTest {

	@Test
	void createStudyService() {
		MemberService memberService = mock(MemberService.class);

		StudyRepository studyRepository = Mockito.mock(StudyRepository.class);

		StudyService studyService = new StudyService(memberService, studyRepository);

		assertNotNull(studyService);
	}
}

 

 

@Mock 애노테이션으로 만드는 방법1 - mock객체를 여러 테스트를 위해서 사용할 때

import static org.junit.Assert.assertNotNull;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import me.whiteship.inflearnthejavatest.member.MemberService;

@ExtendWith(MockitoExtension.class)
class StudyServiceTest {
	
	@Mock
	MemberService memberService;
	
	@Mock
	StudyRepository studyRepository;

	@Test
	void createStudyService() {
		StudyService studyService = new StudyService(memberService, studyRepository);

		assertNotNull(studyService);
	}
}

 

@Mock 애노테이션으로 만드는 방법2 - mock객체 를 하나의 테스트에만 사용할 경우

import static org.junit.Assert.assertNotNull;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import me.whiteship.inflearnthejavatest.member.MemberService;

@ExtendWith(MockitoExtension.class)
class StudyServiceTest {
    
    @Test
    void createStudyService(@Mock MemberService memberService,
                            @Mock StudyRepository studyRepository) {
        StudyService studyService = new StudyService(memberService, studyRepository);
        assertNotNull(studyService);
    }
}