当我尝试在spring boot应用程序中运行unitTest时,我收到此错误。
java.lang.NullPointerException: null
at org.springframework.cloud.sleuth.Span.baggageItems(Span.java:381)
at org.springframework.cloud.sleuth.instrument.web.ZipkinHttpSpanInjector.inject(ZipkinHttpSpanInjector.java:27)
at org.springframework.cloud.sleuth.instrument.web.ZipkinHttpSpanInjector.inject(ZipkinHttpSpanInjector.java:15)
at org.springframework.cloud.sleuth.instrument.web.client.AbstractTraceHttpRequestInterceptor.publishStartEvent(AbstractTraceHttpRequestInterceptor.java:60)
at org.springframework.cloud.sleuth.instrument.web.client.TraceRestTemplateInterceptor.intercept(TraceRestTemplateInterceptor.java:52)
at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86)
我注意到,当我将此版本用于 spring-cloud-dependencies 时,我才会收到此错误:
<spring-cloud.version>Dalston.RELEASE</spring-cloud.version>
但如果我使用此以前的版本:
<spring-cloud.version>Camden.SR6</spring-cloud.version>
一切都按照我的预期运作
为了避免上一版本出现此错误,我该怎么办?
单元测试在此类中进行了扩展,以模拟SpanAccessor
public class AbstractSpanAccessorTest {
@MockBean
private Tracer tracer;
@MockBean
private Span span;
private Random random = new Random();
@Before
public void mockSpan() {
long id = createId();
Span spanMock = Span.builder().name("mock").traceId(id).spanId(id).build();
doReturn(spanMock.traceIdString()).when(span).traceIdString();
doReturn(span).when(tracer).getCurrentSpan();
doReturn(span).when(tracer).createSpan(anyString());
}
private long createId() {
return random.nextLong();
}
}
答案 0 :(得分:1)
你为什么嘲笑跨度?这绝对没有意义。 Span也绝不是一个bean。您已经通过构建器创建了正常范围,您应该保留它。假设您已经设置了Boot上下文属性并且想要模拟tracer
bean,那么您应该执行以下操作
public class AbstractSpanAccessorTest {
@MockBean
private Tracer tracer;
private Random random = new Random();
@Before
public void mockSpan() {
long id = createId();
Span spanMock = Span.builder().name("mock").traceId(id).spanId(id).build();
doReturn(spanMock).when(tracer).getCurrentSpan();
doReturn(spanMock).when(tracer).createSpan(anyString());
}
private long createId() {
return random.nextLong();
}
}