Unit Test Error creating bean with name "amqAdmin" while testing spring integration TCP component - spring

Question

I'm writing a sidecar micro service that talks TCP to a legacy app and uses rabbitMQ on the other side. I'm just getting started and writing tests as I go along to better understand how everything works as I'm new to Spring. My app builds, deploys, and runs fine.
However, writing clean tests has been a bit more complicated. I have been patterning my code off the spring-integration tcp basic examples. I started with having a mock TCPServer to test my code defined outside my test class. But the mock TCPServer kept being built for every test class. So I moved it into the TCPGatewayTest class similar to the example I found.
This led to some missing bean issues which led me to add a #ContextConfiguration annotation which has gotten me further. But now I have other missing beans. I'm sure I'm messing up my ApplicationContext with #ContextConfiguration. Is there a better way of doing this with a different annotation or doing it slightly different? I'm not going the xml route and would like to steer clear of it if possible.
The familiar no qualifying bean error:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.amqp.rabbit.connection.ConnectionFactory' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
My Test Class is the following
package org.inc.imo;
#ComponentScan("org.inc")
#ContextConfiguration(classes = {TCPGatewayTest.TCPServerMock.class,
org.inc.imo.Configuration.TCPConfig.class,
org.inc.imo.Configuration.RabbitConfig.class })
#TestPropertySource(locations= "classpath:test.properties")
#RunWith(SpringRunner.class)
#SpringBootTest
public class TCPGatewayTest {
#Autowired
private TCPGateway gateway;
#Autowired
AbstractServerConnectionFactory crLfServer;
#Before
public void setup() {
TestingUtilities.waitListening(this.crLfServer, 10000L);
}
#Test
public void testConnectionToMockServer() {
String result = gateway.send("Hello World");
assertEquals("HELLO WORLD", result);
}
#Configuration
#MessageEndpoint
public static class TCPServerMock {
#Value("${imo.port}")
private int port;
#Bean()
public AbstractServerConnectionFactory serverCF() {
return new TcpNetServerConnectionFactory(this.port);
}
#Transformer(inputChannel="fromTcp", outputChannel="toEcho")
public String convert(byte[] bytes) {
return new String(bytes);
}
#ServiceActivator(inputChannel="toEcho")
public String upCase(String in) {
return in.toUpperCase();
}
#Bean
public TcpInboundGateway tcpInGate(AbstractServerConnectionFactory connectionFactory) {
TcpInboundGateway inGate = new TcpInboundGateway();
inGate.setConnectionFactory(connectionFactory);
inGate.setRequestChannel(fromTcp());
return inGate;
}
#Bean
public MessageChannel fromTcp() {
return new DirectChannel();
}
}
}
Rabbit Config Class
package org.inc.imo.configuration;
#EnableIntegration
#IntegrationComponentScan
#ComponentScan
#Configuration
public class RabbitConfig {
public final static String IMO_REQUEST_JEA = "imo.request.jea";
public final static String IMO_REQUEST_INFO = "imo.request.info";
#Bean
public AmqpAdmin amqpAdmin(final ConnectionFactory connectionFactory) {
RabbitAdmin admin = new RabbitAdmin(connectionFactory);
admin.declareQueue(jeaRequestQueue());
admin.declareQueue(infoRequestQueue());
return admin;
}
#Bean
public Queue jeaRequestQueue() {
return new Queue(IMO_REQUEST_JEA);
}
#Bean
public Queue infoRequestQueue() {
return new Queue(IMO_REQUEST_INFO);
}
#Bean
public RabbitTemplate rabbitTemplate(final ConnectionFactory connectionFactory) {
RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
rabbitTemplate.setMessageConverter(new Jackson2JsonMessageConverter());
return rabbitTemplate;
}
#Bean
public ObjectWriter objectWriter() {
return new ObjectMapper().writer();
}
}
TCPConfig class
package org.inc.imo.configuration;
#EnableIntegration
#IntegrationComponentScan
#ComponentScan
#Configuration
public class TCPConfig {
#Value("${imo.hostname}")
private String host;
#Value("${imo.port}")
private int port;
private static MessageChannel sendChannel;
private static MessageChannel replyChannel;
#Bean
public MessageChannel replyChannel() {
replyChannel = new DirectChannel();
return replyChannel;
}
#Bean(name="sendChannel")
public MessageChannel sendChannel() {
MessageChannel directChannel = new DirectChannel();
sendChannel = directChannel;
return directChannel;
}
#Bean
public TcpNetClientConnectionFactory connectionFactory() {
TcpNetClientConnectionFactory connectionFactory = new TcpNetClientConnectionFactory(host, port);
connectionFactory.setSingleUse(false);
return connectionFactory;
}
#Bean
#ServiceActivator(inputChannel = "sendChannel")
public TcpOutboundGateway tcpOutboundGateway() {
TcpOutboundGateway tcpOutboundGateway = new TcpOutboundGateway();
tcpOutboundGateway.setConnectionFactory(connectionFactory());
tcpOutboundGateway.setReplyChannel(this.replyChannel());
tcpOutboundGateway.setRequiresReply(true);
return tcpOutboundGateway;
}
}
TCPGateway Interface
package org.inc.imo.Domain;
#MessagingGateway(defaultRequestChannel = "sendChannel")
public interface TCPGateway {
String send(String message);
}

Answer 1

The exception is like:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.amqp.rabbit.connection.ConnectionFactory' available: expected at least 1 bean which qualifies as autowire candidate.
And the suffered bean is like:
#Bean
public AmqpAdmin amqpAdmin(final ConnectionFactory connectionFactory) {
RabbitAdmin admin = new RabbitAdmin(connectionFactory);
admin.declareQueue(jeaRequestQueue());
admin.declareQueue(infoRequestQueue());
return admin;
}
So, you request here org.springframework.amqp.rabbit.connection.ConnectionFactory bean injection, but there is no one.
If you simply test against the local RabbitMQ, there is just enough to add one more bean:
#Bean
ConnectionFactory connectionFactory() {
return new CachingConnectionFactory();
}
and your AmqpAdmin will be able to connect there.