Spring boot 2.0.5.RELEASE - sleuth 和mockito

Question

我已经尝试解决这个问题一周了，但一点运气都没有。问题出在单元测试上。

这是我要测试的课程：

import brave.Span;
import brave.Tracer;

@Service
public class InternetBackEndRestClient {

    @Autowired
    private Tracer tracer;

  public PasswordJwtResponse generatePassworJwt(PasswordJwtRequest passwordJwtRequest, String traceId) throws LogonProxyException {
      log.info("{\"Starting method\": \"generatePassworJwt\", \"input\": {} }", passwordJwtRequest);

    Span newSpan = tracer.nextSpan().name("spanPasswordJwtResponse");
    ...
  }
}

我怎样才能进行单元测试？Brave.Tracer 是最后一堂课，因此我无法嘲笑它。无论如何要设置上下文吗？或模拟追踪器？

@RunWith(MockitoJUnitRunner.class)
public class InternetBackEndRestClientTest {

   @InjectMocks
   private InternetBackEndRestClient internetBackEndRestClient; 

   @Mock
   private Tracer tracer; 

   @Test
   public void generatePassworJwt_test() { 
      internetBackEndRestClient.generatePassworJwt(...);
      ....
   }
}

有人可以帮我吗？

Answer 1

这是对我有用的解决方案：

@RunWith(MockitoJUnitRunner.class)
public class InternetBackEndRestClientTest {

    private static final String TRACEID = "12345678901234567890123456789012";

    @InjectMocks
    private InternetBackEndRestClient internetBackEndRestClient;

    @Mock
    private Tracer tracer;
   @Mock
    private Span span;

    @Before
    public void setUp()  {

        MockitoAnnotations.initMocks(this);

        when(tracer.nextSpan()).thenReturn(span);
        when(tracer.nextSpan().name("spanPasswordJwtResponse"))
           .thenReturn(span);
        when(span.start()).thenReturn(span);

        Tracing tracing = Tracing.newBuilder().build();
        doReturn(tracing.tracer().withSpanInScope(span))
             .when(tracer).withSpanInScope(span);
        doNothing().when(span).finish();

        ...
    }
    ...
}