无法使用spring的嵌入式消息代理进行测试

Question

我有以下组件，用于向broker（kafka）发送消息，并由Spring-cloud的StreamListener接收。现在我需要写测试，我向嵌入式代理发送消息，并且我验证是否收到了消息。这是我的组件：

@Component
public class FooMessaging {

    @Autowired
    private Processor processor;

    public void sendMsg(FooMsg msg) {        
        // some logic
        processor.output().send(MessageBuilder.withPayload(msg).build());
        // some logic
    }

    // and handler:

    @StreamListener(value = Processor.INPUT)
    public void handler(FooMsg msg) {
       threadSafeMap.put(msg.getId(), msg.getBody());
    }
}

配置：

@EnableBinding(Processor.class)
public class BrokerConfig {
}

这是我的示例测试，我尝试只测试我的自动装配是否为空，然后我想发送消息到输出通道并通过Spring云测试支持的嵌入式消息代理接收它。你能告诉我怎么做吗？我刚尝试运行以下代码：

@RunWith(SpringRunner.class)
@SpringBootTest(classes = {BrokerConfig.class})
public class BokerTest {
    @Autowired
    private Processor processor;

    @Test
    public void sampleTest() {
        assertNotNull(processor);
    }
}

但我得到了这个例外，我无法继续：

java.lang.IllegalStateException: Failed to load ApplicationContext

    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
    at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189)
    at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.springframework.context.ApplicationContextException: Failed to start bean 'outputBindingLifecycle'; nested exception is org.springframework.cloud.stream.binder.BinderException: Exception thrown while building outbound endpoint
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176)
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:50)
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112)
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:880)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:121)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
    ... 25 more
Caused by: org.springframework.cloud.stream.binder.BinderException: Exception thrown while building outbound endpoint
    at org.springframework.cloud.stream.binder.AbstractMessageChannelBinder.doBindProducer(AbstractMessageChannelBinder.java:137)
    at org.springframework.cloud.stream.binder.AbstractMessageChannelBinder.doBindProducer(AbstractMessageChannelBinder.java:66)
    at org.springframework.cloud.stream.binder.AbstractBinder.bindProducer(AbstractBinder.java:138)
    at org.springframework.cloud.stream.binding.BindingService.bindProducer(BindingService.java:124)
    at org.springframework.cloud.stream.binding.BindableProxyFactory.bindOutputs(BindableProxyFactory.java:238)
    at org.springframework.cloud.stream.binding.OutputBindingLifecycle.start(OutputBindingLifecycle.java:57)
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
    ... 37 more
Caused by: org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server within timeout: 10000
    at org.I0Itec.zkclient.ZkClient.connect(ZkClient.java:1232)
    at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:156)
    at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:130)
    at kafka.utils.ZkUtils$.createZkClientAndConnection(ZkUtils.scala:76)
    at kafka.utils.ZkUtils$.apply(ZkUtils.scala:58)
    at kafka.utils.ZkUtils.apply(ZkUtils.scala)
    at org.springframework.cloud.stream.binder.kafka.provisioning.KafkaTopicProvisioner.createTopicAndPartitions(KafkaTopicProvisioner.java:171)
    at org.springframework.cloud.stream.binder.kafka.provisioning.KafkaTopicProvisioner.createTopicsIfAutoCreateEnabledAndAdminUtilsPresent(KafkaTopicProvisioner.java:153)
    at org.springframework.cloud.stream.binder.kafka.provisioning.KafkaTopicProvisioner.provisionProducerDestination(KafkaTopicProvisioner.java:108)
    at org.springframework.cloud.stream.binder.kafka.provisioning.KafkaTopicProvisioner.provisionProducerDestination(KafkaTopicProvisioner.java:60)
    at org.springframework.cloud.stream.binder.AbstractMessageChannelBinder.doBindProducer(AbstractMessageChannelBinder.java:119)
    ... 43 more

我在pom.xml中也有这种依赖：

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-stream-test-support</artifactId>
        <scope>test</scope>
    </dependency>

编辑：当我使用zookeeper和kafka测试工作运行docker镜像时，我发现了。所以问题是春天不要使用嵌入式而是寻找远程。

Answer 1

如果您想使用Kafka嵌入式代理进行测试，您可能需要检查KafkaBInder中的测试/配置是如何完成的。简单地添加spring-cloud-stream-test-support将无法正常工作。

但是，您也可以添加新的（简化的）TestBinder。以下是有关如何在Pom / Gradle https://github.com/spring-cloud/spring-cloud-stream/pull/1241中配置它的说明

注意：从POM / Gradle中删除spring-cloud-stream-test-support

。 。以下是测试的代码片段：```public class DemoRabbit174ApplicationTests {

@Test
public void test() {
    ApplicationContext context = SpringApplication.run(new Class[] {MyConfiguration.class, 
            TestChannelBinderConfiguration.class}, new String[] {});
    InputDestination source = context.getBean(InputDestination.class);
    source.send(new GenericMessage<byte[]>("Hello".getBytes()));
}

@EnableAutoConfiguration
@EnableBinding(Sink.class)
public static class MyConfiguration {

    @StreamListener("input")
    private void sink(String string) {
        System.out.println(string);
    }
}

} ```