How to write the unit tests for the apache camel routes - apache-camel

Question

Can someone please help in writing the unit tests for this class.
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#Component("edi820AdapterRouteBuilder")
public class EDI820AdapterRouteBuilder extends BaseRouteBuilder {
private static final Logger LOGGER = LoggerFactory.getLogger(EDI820AdapterRouteBuilder.class);
private static final String DIRECT_Q_RECEIVER = "direct:queueReceiver";
private static final String DIRECT_PROCESS_820 = "direct:process820";
private static final String DIRECT_TO_HIX = "direct:toHIX";
private static final String DIRECT_TO_CMS = "direct:toCMS";
private static final String MDC_TRANSACTIONID = "transactionId";
private static final String REQUEST_ID = "RequestID";
private static final String DIRECT_PUT_MDC = "direct:putMDC";
private static final String DIRECT_REMOVE_MDC = "direct:removeMDC";
#Override
public void configure() throws Exception {
super.configure();
LOGGER.debug("configure called.");
String queueName = appConfig.getInboundQueueName();
LOGGER.debug("inboundQueueName: {}", queueName);
String toHIXendpoint = appConfig.getEndpointWithOptions("toHIXendpoint");
LOGGER.debug("toHIXendpoint: {}", toHIXendpoint);
String toCMSendpoint = appConfig.getEndpointWithOptions("toCMSendpoint");
LOGGER.debug("toCMSendpoint: {}", toCMSendpoint);
String routeDelay = appConfig.getRouteDelay();
LOGGER.debug("routeDelay: {}",routeDelay);
from("timer://runOnce?repeatCount=1&delay="+routeDelay)
.to("bean:edi820AdapterRouteBuilder?method=addRoute")
.end();
from(DIRECT_Q_RECEIVER)
.to(PERSIST_EDI820_XDATA)
.to(EDI820_REQUEST_TRANSFORMER)
.to(DIRECT_PROCESS_820)
.log(LoggingLevel.INFO, LOGGER,"Executed "+DIRECT_Q_RECEIVER)
.end();
from(DIRECT_PROCESS_820)
.choice()
.when(header(TRANSACTION_SOURCE_STR).isEqualTo(HIX_SOURCE_SYSTEM))
.log(LoggingLevel.INFO, LOGGER,"Calling route for: "+HIX_SOURCE_SYSTEM)
.to(DIRECT_TO_HIX)
.when(header(TRANSACTION_SOURCE_STR).isEqualTo(CMS_SOURCE_SYSTEM))
.log(LoggingLevel.INFO, LOGGER,"Calling route for: "+CMS_SOURCE_SYSTEM)
.to(DIRECT_TO_CMS)
.otherwise()
.log(LoggingLevel.INFO, LOGGER,"Invalid "+TRANSACTION_SOURCE_STR+" ${header["+TRANSACTION_SOURCE_STR+"]}")
.end();
from(DIRECT_TO_HIX).routeId("edi820adapter-to-hix-producer-route")
.log(LoggingLevel.INFO, LOGGER,"Executing edi820adapter-to-hix-producer-route")
.marshal().json(JsonLibrary.Jackson)//Convert body to json string
.to(toHIXendpoint)
.log(LoggingLevel.DEBUG, LOGGER, "json body sent to edi820-hix: ${body}")
.log(LoggingLevel.INFO, LOGGER,"Executed edi820adapter-to-hix-producer-route")
.end();
from(DIRECT_TO_CMS).routeId("edi820adapter-to-cms-producer-route")
.log(LoggingLevel.INFO, LOGGER,"Executing edi820adapter-to-cms-producer-route")
.marshal().json(JsonLibrary.Jackson)//Convert body to json string
.to(toCMSendpoint)
.log(LoggingLevel.DEBUG, LOGGER, "json body sent to edi820-cms: ${body}")
.log(LoggingLevel.INFO, LOGGER,"Executed edi820adapter-to-cms-producer-route")
.end();
from(DIRECT_PUT_MDC).process(new Processor() {
public void process(Exchange exchange) throws Exception {
if (exchange.getIn().getHeader(REQUEST_ID) != null) {
MDC.put(MDC_TRANSACTIONID, (String) exchange.getIn().getHeader(REQUEST_ID));
}
}
}).end();
from(DIRECT_REMOVE_MDC).process(new Processor() {
public void process(Exchange exchange) throws Exception {
MDC.remove(MDC_TRANSACTIONID);
}
}).end();
}
public void addRoute(Exchange exchange) {
try {
CamelContext context = exchange.getContext();
ModelCamelContext modelContext = context.adapt(ModelCamelContext.class);
modelContext.addRouteDefinition(buildRouteDefinition());
} catch (Exception e) {
LOGGER.error("Exception in addRoute: {}", e.getMessage());
LOGGER.error(ExceptionUtils.getFullStackTrace(e));
}
}
private RouteDefinition buildRouteDefinition() {
String queueName = appConfig.getInboundQueueName();
RouteDefinition routeDefinition = new RouteDefinition();
routeDefinition
.from("jms:queue:" + queueName).routeId("edi820-adapter-jms-consumer-route")
.to(DIRECT_PUT_MDC)
.log(LoggingLevel.INFO, LOGGER,"Executing edi820-adapter-jms-consumer-route")
.log(LoggingLevel.DEBUG, LOGGER, "Received Message from queue: "+queueName)
.to(DIRECT_Q_RECEIVER)
.log(LoggingLevel.INFO, LOGGER,"Executed edi820-adapter-jms-consumer-route")
.to(DIRECT_REMOVE_MDC)
.end();
return routeDefinition;
}
}
==============================================================================
Please let me know if any additional information is needed. Thanks for the help in advance.

Answer 1

It is not possible to write entire test cases mentioning those classes. So I'm writing snippet code for understanding purposes.
Sample Example for Understanding:
Below is a snippet of code for the route builder class:
public class CheckRouteBuilder extends RouteBuilder{
#Override
public void configure() throws Exception {
from("timer://runOnce?repeatCount=1&delay="+routeDelay)
.to("bean:edi820AdapterRouteBuilder?method=addRoute")
.end();
}
}
Follow the test cases of the above class:
public class CheckRouteBuilderTest extends CamelTestSupport {
#Test
public void testConfigure() throws Exception {
context.addRoutes(new CheckRouteBuilder ());
RouteDefinition route = context.getRouteDefinitions().get(0);
AdviceWith.adviceWith(route, context, new AdviceWithRouteBuilder() {
#Override
public void configure() throws Exception {
replaceFromWith("direct:TestEndpoint"); // timer://runOnce?repeatCount=1&delay="+routeDelay replace with direct:TestEndpoint because during test timer component not support that's why need to replace with direct component.
weaveAddLast().to("mock:endPoint");
}
});
MockEndpoint mockEndpoint = getMockEndpoint("mock:endPoint");
mockEndpoint.expectedMessageCount(1);
template.sendBodyAndHeaders("direct:TestEndpoint", "#", "##");
mockEndpoint.assertIsSatisfied();
}
}
# -> Mention body like String, JSONObject, XML. If body is not required then simply pass the null value.
## -> Mention Header like Content-type:application/json to need to pass in Map<String, Object) format.