BDDMockito

BDD 구조에 맞게 Mockito 문법을 변화시킨 것
이름만 바꾼것일뿐 동작은 기존 Mockito와 동일하다

기존

@ExtendWith(MockitoExtension.class)
class MailServiceTest {

    @Spy
    private MailSendClient mailSendClient;

    @Mock
    private MailSendHistoryRepository mailSendHistoryRepository;

    @InjectMocks
    private MailService mailService;

    @DisplayName("메일 전송 테스트")
    @Test
    void sendMail() {
        // given
        when(mailSendClient.sendEmail(anyString(), anyString(), anyString(),
            anyString())).thenReturn(true);

//        doReturn(true)
//            .when(mailSendClient)
//            .sendEmail(anyString(), anyString(), anyString(), anyString());
        // when
        boolean result = mailService.sendMail("", "", "", "");

        // then
        assertThat(result).isTrue();
        Mockito.verify(mailSendHistoryRepository, times(1)).save(any(MailSendHistory.class));
    }
}

• given절이지만 when으로 시작하는 Mockito 문법이 어색하다.

BDDMocktio 사용

@ExtendWith(MockitoExtension.class)
class MailServiceTest {

    @Spy
    private MailSendClient mailSendClient;

    @Mock
    private MailSendHistoryRepository mailSendHistoryRepository;

    @InjectMocks
    private MailService mailService;

    @DisplayName("메일 전송 테스트")
    @Test
    void sendMail() {
        // given
//        when(mailSendClient.sendEmail(anyString(), anyString(), anyString(),
//            anyString())).thenReturn(true);
        BDDMockito.given(mailSendClient.sendEmail(anyString(), anyString(), anyString(),
            anyString())).willReturn(true);
        
//        doReturn(true)
//            .when(mailSendClient)
//            .sendEmail(anyString(), anyString(), anyString(), anyString());
        // when
        boolean result = mailService.sendMail("", "", "", "");

        // then
        assertThat(result).isTrue();
        Mockito.verify(mailSendHistoryRepository, times(1)).save(any(MailSendHistory.class));
    }
}