Java Mockito - 我如何测试这个方法？

Question

我有一个在不同对象和服务之间进行复杂交互的方法，我想使用 Mockito 框架对其进行测试。我将不胜感激。

@Autowired
private SolicitationService solicitationService;

@Autowired
private ClientRestService clientRestService;

public void sendToClient() {
    this.solicitationService.getAllCnpjWithoutIntegration().forEach(sol -> {
        try {
            ClientDto dto = toClientDto(sol.getDocument(), sol.getName());
            Boolean exist = this.clientRestService.findClient(dto);

            //Exists Client
            if (exist) {
                this.solicitationService.create(this.toSolicitation(sol.getDocument(),  dto.getName()));
            }
        } catch (Exception e) {
            log.error("ERROR: Impossible create client {}", sol.getDocument());
        }
    });
}

我的测试类：当我尝试执行时收到此错误消息：“org.mockito.exceptions.misusing.UnnecessaryStubbingException: 检测到不必要的存根。 干净且可维护的测试代码需要零个不必要的代码。”

@ExtendWith(MockitoExtension.class)
class IntegrationServiceImplTest {

    @Mock
    private IntegrationService integrationService;

    @Mock
    private SolicitationService solicitationService;

    @Mock
    private CatcherRestClient catcherRestClient;

    @BeforeEach
    void setUp() {
    }

    @Test
    void contextLoads() {
        assertThat(integrationService).isNotNull();
        assertThat(solicitationService).isNotNull();
        assertThat(catcherRestClient).isNotNull();
    }

    @Test
    void doesSendToClient() {
        SolicitationEntity solicitationEntity = mock(SolicitationEntity.class);
        CellDto cellDto = mock(CellDto.class);
        JsonNode jsonNode = mock(JsonNode.class);

        when(solicitationService.getAllCnpjWithoutIntegration()).thenReturn(Arrays.asList(cellDto));
        when(catcherRestClient.produceCnpj(any())).thenReturn(jsonNode);
        when(solicitationService.create(any())).thenAnswer((invocation) -> {
                    SolicitationEntity entity = invocation.getArgument(0, SolicitationEntity.class);
                    return entity;
                }
        );

        assertDoesNotThrow(() -> integrationService.sendToClient());
    }

}

Answer 1

由于您需要单元测试给定的类，因此仅模拟其依赖项，例如 solicitationService 而不是 solicitationRepository。

当模拟被模拟对象方法的行为时，你可以使用 thenReturn 或 thenAnswer 方法。在 thenAnswer 中，您可以获取传递给方法的 arg 值并断言这些值

@Test
void doesSendToClient() {
    when(solicitationRepository.getAllCnpjWithoutIntegration()).thenReturn(Arrays.asList(solicitationEntity));
    when(clientRestService.findClient(any())).thenReturn(true);
    when(solicitationService.create(any())).thenAnswer((invocation) -> {
        SolicitationDto solicitationDto =  invocation.getArgument(0, SolicitationDto.class);
                //assert data in dto and return require response
                return solicitationEntity;
            }
    );

    assertDoesNotThrow(() -> integrationService.sendToClient());
}