Cannot use spring's embedded message broker for test - spring

Question

I have following component which is using for sending messages to broker (kafka) and also receiving by StreamListener of spring-cloud. Now I need write test where I send message to embedded broker and also I verify that message is received. Here is my component:
#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());
}
}
config:
#EnableBinding(Processor.class)
public class BrokerConfig {
}
And here is my sample test where I tried just tests if my autowired is not null and next I want send message to output channel and receive it over embedded message broker of spring cloud test support. Can you tell me how to do that? I just tried run following code:
#RunWith(SpringRunner.class)
#SpringBootTest(classes = {BrokerConfig.class})
public class BokerTest {
#Autowired
private Processor processor;
#Test
public void sampleTest() {
assertNotNull(processor);
}
}
but I got this exception and I am not able to continue:
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
I also have this dependency in pom.xml:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-stream-test-support</artifactId>
<scope>test</scope>
</dependency>
EDIT:
I find out when I have running docker image with zookeeper and kafka test works. So problem is spring don't use embedded but looking for remote.

Answer 1

If you want to test with Kafka embedded broker you may want to check how tests/configuration is done in KafkaBInder.
Simply adding spring-cloud-stream-test-support won't work.
However, you can also add the new (simplified) TestBinder.
Here is instructions on how to configure it in your Pom/Gradle https://github.com/spring-cloud/spring-cloud-stream/pull/1241
NOTE: Remove spring-cloud-stream-test-support from your POM/Gradle
. . and here is the code snippet for your test:
```
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);
}
}
}
```