Mock객체 stubbing연습문제

 

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.when;

import java.util.Optional;

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.domain.Member;
import me.whiteship.inflearnthejavatest.domain.Study;
import me.whiteship.inflearnthejavatest.member.MemberService;

@ExtendWith(MockitoExtension.class)
class StudyServiceTest {

	@Test
	void createNewStudy(@Mock MemberService memberService, @Mock StudyRepository studyRepository) {
		StudyService studyService = new StudyService(memberService, studyRepository);
		assertNotNull(studyService);

		Member member = new Member();
		member.setId(1L);
		member.setEmail("rlawls1991@mail.com");
		
		//1. memberSErvice객체에 findByid 메소드를 1L값으로 호출하면 Optional.of(member) 객체를 리턴하도록 Stubbing
		when(memberService.findById(1L)).thenReturn( Optional.of(member));
		
		//2. studyRepository 객체에 save 메소드를 study 객체로 호출하면 study 객체 그대로 리턴하도록 study;
		Study study = new Study(10, "test");
		when(studyRepository.save(study)).thenReturn(study);
		

		studyService.createNewStudy(1L, study);
		assertNotNull(study.getOwner());
		assertEquals(member, study.getOwner());
	}

}