CDI Testing
Testing is a crucial part of any development or integration work. In case you're using the Camel CDI integration for your applications, you have a number of options to ease testing.
You can use CDI for IoC and the Camel testing endpoints like DataSet
, Mock
, Test
and testing API like AdviceWith
and NotifyBuilder
to create sophisticated integration/unit tests that are easy to run and debug inside your IDE.
There are two a number of supported approaches for testing with CDI in Camel:
Name | Testing Frameworks Supported | Description |
---|
Camel CDI Test | | Available as of Camel 2.17 The Camel CDI test module (camel-test-cdi ) provides a JUnit runner that bootstraps a test environment using CDI so that you don't have to be familiar with any CDI testing frameworks and can concentrate on the testing logic of your Camel CDI applications. |
Arquillian | | Arquillian is a testing platform that handles all the plumbing of in-container testing with support for a wide range a of target containers. Arquillian can be configured to run your test classes in embedded (in JVM CDI), managed (a real Web server or Java EE application server instance started in a separate process) or remote (the lifecycle of the container isn't managed by Arquillian) modes. You have to create the System Under Test (SUT) in your test classes using ShrinkWrap Descriptorsdescriptors. The benefit is that you have a very fine-grained control over the application configuration that you want to test. The downside is more code and more complex classpath / class loading structure. |
Camel CDI Test
...
|
PAX Exam | | PAX Exam lets you test your Camel applications in OSGi, Java EE or standalone CDI containers with the ability to finely configure your System Under Test (SUT) |
...
Camel CDI Test
With this approach, your test classes use the JUnit runner provided in Camel CDI test. This runner manages the lifecycle of a standalone CDI container and automatically assemble and deploy the System Under Test (SUT) based on the classpath into the container.
It deploys the test class as a CDI bean so that dependency injection and any CDI features is available within the test class.
Maven users will need to add the following dependency to their pom.xml
for this component:
Code Block |
---|
|
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-test-cdi</artifactId>
<scope>test</scope>
<version>x.x.x</version>
<!-- |
It deploys the test class as a CDI bean so that dependency injection and any CDI features is available within the test class.
Maven users will need to add the following dependency to their pom.xml
for this component:
Code Block |
---|
|
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-test-cdi</artifactId>
<scope>test</test>
<version>x.x.x</version>
<!-- use the same version as your Camel core version -->
</dependency> |
...
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
public class CamelCdiRunnerTestCamelCdiTest {
@Inject
CamelContext context;
@Test
public void test() {
assertThat("Camel context status is incorrect!",
context.getStatus(),
is(equalTo(ServiceStatus.Started)));
}
} |
...
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
public class CamelCdiRunnerTestCamelCdiTest {
@Test
public void test(@Uri("direct:foo") ProducerTemplate producer) {
producer.sendBody("bar");
}
} |
Camel CDI test provides the @Order
annotation that you can use to execute the test methods in a particular sequence, e.g.:
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
public class CamelCdiRunnerTestCamelCdiTest {
@Test
@Order(1)
public void firstTestMethod() {
}
@Test
@Order(2)
public void secondTestMethod() {
}
} |
One CDI container is bootstrapped for the entire execution of the test class.
Besides, the test class is deployed as a CDI bean, so that you can control how the runner instantiate the test class, either one test class instance for each test method (the default, depending on the built-in default @Dependent
CDI scope), or one test class instance for the entire test class execution using the @ApplicationScoped
scope, e.g.:
Code Block |
---|
|
@ApplicationScoped
@RunWith(CamelCdiRunner.class)
public class CamelCdiRunnerTestCamelCdiTest {
int counter;
@Test
@Order(1)
public void firstTestMethod() {
counter++;
}
@Test
@Order(2)
public void secondTestMethod() {
assertEquals(counter, 1);
}
} |
Arquillian
In case you need to add additional test beans, you can use the @Beans
annotation provided by Camel CDI test. For example, if you need to add a route to your Camel context, instead of declaring a RouteBuilder
bean with a nested class, you can declare a managed bean, e.g.:
Code Block |
---|
|
class TestRoute extends RouteBuilder {
@Override
public void configure() {
from("direct:foo").to("mock:bar");
}
} |
And add it with the @Beans
annotation, e.g.:
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
@Beans(classes = TestRoute.class)
public class CamelCdiTest {
} |
Arquillian
With this approach, you use the JUnit runner or TestNG support provided by Arquillian to delegate the bootstrap of the CDI container. You need to declare a @Deployment
method to create your application configuration to be deployed in the container using ShrinkWrap descriptors, e.g.:
Code Block |
---|
|
@RunWith(Arquillian.class)
public class CamelCdiJavaSeTest {
@Deployment
public static Archive deployment() {
return ShrinkWrap.create(JavaArchive.class)
// Camel CDI
.addPackage(CdiCamelExtension.class.getPackage())
// Test classes
.addPackage(Application.class.getPackage())
// Bean archive deployment descriptor
.addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml");
}
@Inject
CamelContext context;
@Test
public void test() {
assertThat("Camel context status is incorrect!",
context.getStatus(),
is(equalTo(ServiceStatus.Started)));
}
} |
In that example, you can use any Java SE Arquillian embedded container adapter, like the Weld embedded container adapter e.g. with Maven you need that complete set of dependencies:
Code Block |
---|
|
<dependencies>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.descriptors</groupId>
<artifactId>shrinkwrap-descriptors-depchain</artifactId>
<type>pom</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.container</groupId>
<artifactId>arquillian-weld-se-embedded-1.1</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.weld</groupId>
<artifactId>weld-core</artifactId>
<scope>test</scope>
</dependency>
</dependencies> |
Using ShrinkWarp Descriptors, you have a complete control over the configuration and kind of Camel CDI applications you want to test. For example, to test a Camel CDI application that uses the Camel REST DSL configured with the Servlet component, you need to create a Web archive, e.g.:
Code Block |
---|
|
@RunWith(Arquillian.class)
public class CamelCdiWebTest {
@Deployment
public static Archive<?> createTestArchive() {
return ShrinkWrap.create(WebArchive.class)
.addClass(Application.class)
.addAsWebInfResource(EmptyAsset.INSTANCE, ArchivePaths.create("beans.xml"))
.setWebXML(Paths.get("src/main/webapp/WEB-INF/web.xml").toFile());
}
@Test
@RunAsClient
public void test(@ArquillianResource URL url) throws Exception {
assertThat(IOHelper.loadText(new URL(url, "camel/rest/hello").openStream()),
is(equalTo("Hello World!\n")));
}
} |
In the example above, you can use any Arquillian Web container adapter, like the Jetty embedded container adapter e.g. with Maven you need the complete following set of dependencies:
Code Block |
---|
|
</dependencies>
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.testenricher</groupId>
<artifactId>arquillian-testenricher-resource</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.shrinkwrap.descriptors</groupId>
<artifactId>shrinkwrap-descriptors-depchain</artifactId>
<type>pom</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-webapp</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-annotations</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.container</groupId>
<artifactId>arquillian-jetty-embedded-9</artifactId>
<scope>test</scope>
</dependency>
</dependencies> |
You can see the tests in the camel-example-cdi-rest-servlet
example for a complete working example of testing a Camel CDI application using the REST DSL and deployed as a WAR in Jetty.
PAX Exam
If you target OSGi as runtime environment for your Camel CDI applications, you can use PAX Exam to automate the deployment of your tests into an OSGi container, for example into Karaf, e.g.:
Code Block |
---|
|
@RunWith(PaxExam.class)
@ExamReactorStrategy(PerClass.class)
public class PaxCdiOsgiTest {
@Configuration
public Option[] config() throws IOException {
return options(
// Karaf configuration
karafDistributionConfiguration()
.frameworkUrl(
maven()
.groupId("org.apache.karaf")
.artifactId("apache-karaf")
.versionAsInProject()
.type("zip"))
.name("Apache Karaf")
.unpackDirectory(new File("target/paxexam/unpack/")),
// PAX CDI Weld
features(
maven()
.groupId("org.ops4j.pax.cdi")
.artifactId("pax-cdi-features")
.type("xml")
.classifier("features")
.versionAsInProject(),
"pax-cdi-weld"),
// Karaf Camel commands
mavenBundle()
.groupId("your.application.groupId")
.artifactId("your.application.artifactId")
.versionAsInProject()
);
}
@Inject
private CamelContext context;
@Test
public void testContextStatus() {
assertThat("Camel context status is incorrect!",
context.getStatus(), equalTo(ServiceStatus.Started));
}
}
|
You can see the tests in the camel-example-cdi-osgi
example for a complete working example of testing a Camel CDI application deployed in an OSGi container using PAX Exam.
Testing Patterns
You can see the tests in the camel-example-cdi-test
example for a thorough overview of the following testing patterns for Camel CDI applications.
Info |
---|
While the patterns above are illustrated using the Camel CDI test module, they should equally work with Arquillian and PAX Exam unless otherwise stated or illustrated with a specific example. |
Test routes
You may want to add some Camel routes to your Camel CDI applications for testing purpose. For example to route some exchanges to a MockEndpoint
instance. You can do that by declaring a RouteBuilder
bean within the test class as you would normally do in your application code, e.g.:
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
public class CamelCdiTest {
// Declare a RouteBuilder bean for testing purpose
// that is automatically added to the Camel context
static class TestRoute extends RouteBuilder {
@Override
public void configure() {
from("direct:out").routeId("test").to("mock:out");
}
// And retrieve the MockEndpoint for further assertions
@Inject
@Uri("mock:out")
MockEndpoint mock;
} |
You can find more information in auto-detecting Camel routes.
In case you prefer declaring the RouteBuilder
bean in a separate class, for example to share it more easily across multiple test classes, you can use the @Beans
annotation to instruct Camel CDI test to deploy that class as a CDI bean, e.g.:
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
@Beans(classes = TestRoute.class)
public class CamelCdiTest {
// ...
} |
Bean alternatives
You may want to replace a bean that is used in your Camel routes by another bean for testing purpose, for example to mock it or change the behaviour of the application bean.
Imagine you have the following route in your application:
Code Block |
---|
|
public class Application {
@ContextName("camel-test-cdi")
static class Hello extends RouteBuilder {
@Override
public void configure() {
from("direct:in").bean("bean").to("direct:out");
}
}
} |
And the corresponding bean:
Code Block |
---|
|
@Named("bean")
public class Bean {
public String process(@Body String body) {
return body;
}
} |
Then you can replace the bean above in your tests by declaring an alternative bean, annotated with @Alternative
, e.g.:
Code Block |
---|
|
@Alternative
@Named("bean")
public class AlternativeBean {
public String process(@Body String body) {
return body + " with alternative bean!";
}
} |
And you need to activate (a.k.a. select in CDI terminology) this alternative bean in your tests. If your using the CamelCdiRunner
JUnit runner, you can do that with the @Beans
annotation provided by the Camel CDI test module, e.g.:
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
@Beans(alternatives = AlternativeBean.class)
public class CamelCdiTest {
@Test
public void testAlternativeBean(@Uri("direct:in") ProducerTemplate producer
@Uri("mock:out") MockEndpoint mock) throws InterruptedException {
mock.expectedMessageCount(1);
mock.expectedBodiesReceived("test with alternative bean!");
producer.sendBody("test");
MockEndpoint.assertIsSatisfied(1L, TimeUnit.SECONDS, mock);
}
static class TestRoute extends RouteBuilder {
@Override
public void configure() {
from("direct:out").routeId("test").to("mock:out");
}
}
} |
If you're using Arquillian as testing framework, you need to activate the alternative in your deployment method, e.g.:
Code Block |
---|
|
@RunWith(Arquillian.class)
public class CamelCdiTest {
@Deployment
public static Archive deployment() {
return ShrinkWrap.create(JavaArchive.class)
// Camel CDI
.addPackage(CdiCamelExtension.class.getPackage())
// Test classes
.addPackage(Application.class.getPackage())
// Bean archive deployment descriptor
.addAsManifestResource(
new StringAsset(
Descriptors.create(BeansDescriptor.class)
.getOrCreateAlternatives()
.stereotype(MockAlternative.class.getName()).up()
.exportAsString()),
"beans.xml");
}
//...
} |
Camel context customization
You may need to customize your Camel contexts for testing purpose, for example disabling JMX management to avoid TCP port allocation conflict. You can do that by declaring a custom Camel context bean in your test class, e.g.:
Code Block |
---|
|
@RunWith(CamelCdiRunner.class)
public class CamelCdiTest {
@Default
@ContextName("camel-test-cdi")
@ApplicationScoped
static class CustomCamelContext extends DefaultCamelContext {
@PostConstruct
void customize() {
disableJMX();
}
}
} |
In that example, the custom Camel context bean declared in the test class will be used during the test execution instead of the default Camel context bean provided by the Camel CDI component.
Routes advising with adviceWith
AdviceWith
is used for testing Camel routes where you can advice an existing route before its being tested. It allows to add Intercept or weave routes for testing purpose, for example using the Mock component.
It is recommended to only advice routes which are not started already. To meet that requirement, you can use the CamelContextStartingEvent
event by declaring an observer method in which you use adviceWith
to add a mock
endpoint at the end of your Camel routeWith this approach, you use the JUnit runner or TestNG support provided by Arquillian to delegate the bootstrap of the CDI container. You need to declare a @Deployment
method to create your application configuration to be deployed in the container using ShrinkWrap Descriptors, e.g.:
Code Block |
---|
|
@RunWith(ArquillianCamelCdiRunner.class)
public class CamelCdiJavaSeTest {
@Deployment
public static Archive deployment() {
return ShrinkWrap.create(JavaArchive.class)
CamelCdiTest {
void advice(@Observes CamelContextStartingEvent event,
// Camel CDI
.addPackage(CdiCamelExtension.class.getPackage())
@Uri("mock:test") MockEndpoint messages,
// Test classes
ModelCamelContext context) throws Exception {
context.addPackage(Application.class.getPackage()getRouteDefinition("route")
// Bean archive deployment descriptor
.adviceWith(context, new AdviceWithRouteBuilder() {
.addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml");
}
@Override
@Inject
CamelContext context;
@Test
public void testconfigure() {
assertThat("Camel context status is incorrect!",
weaveAddLast().to("mock:test");
context.getStatus(),
}
});
is(equalTo(ServiceStatus.Started)));
}
}}
} |
JUnit rules
Camel CDI test starts the CDI container after all the JUnit class rules have executed.
That way, you can use JUnit class rules to initialise (resp. clean-up) resources that your test classes would require during their execution before the container initialises (resp. after the container has shutdown). For example, you could use an embedded JMS broker like ActiveMQ Artemis to test your Camel JMS applicationUsing ShrinkWarp Descriptors, you have a complete control over the configuration and kind of Camel CDI applications you want to test. For example, to test a Camel CDI application that uses the Camel REST DSL configured with the Servlet component, you need to create a Web archive, e.g.:
Code Block |
---|
|
|
---|
|
import org.apache.activemq.artemis.jms.server.embedded.EmbeddedJMS;
@RunWith(CamelCdiRunner.class)
public class CamelCdiTest {
@ClassRule
public static final ExternalResource resources = new ExternalResource() {
private final EmbeddedJMS jms = new EmbeddedJMS();@RunWith(Arquillian.class)
public class CamelCdiWebTest {
@Deployment
public@Override
static Archive<?> createTestArchive() {
protected void before() throws return ShrinkWrap.create(WebArchive.class)Exception {
jms.addClassstart(Application.class);
.addAsWebInfResource(EmptyAsset.INSTANCE, ArchivePaths.create("beans.xml"))
}
@Override
protected .setWebXML(Paths.get("src/main/webapp/WEB-INF/web.xml").toFile());
void after() throws Exception {
}
@Test
@RunAsClient
jms.stop();
public void test(@ArquillianResource URL}
url) throws Exception {};
@Inject
assertThat(IOHelper.loadText(new URL(url, "camel/rest/hello").openStream()),
@Uri("jms:destination")
private ProducerTemplate producer;
@Test
public void is(equalTo("Hello World!\n")));
}
} |
Testing
Routes advising with adviceWith
AdviceWith
is used for testing Camel routes where you can advice an existing route before its being tested. It allows to add Intercept or weave routes for testing purpose, for example using the Mock component.
sendMessage() {
producer.sendBody("message");
}
} |
Another use case is to assert the behaviour of your application after it has shutdown. In that case, you can use the Verifier
ruleIt is recommended to only advice routes which are not started already. To meet that requirement, you can use the CamelContextStartingEvent
event by declaring an observer method in which you use adviceWith
to add a mock
endpoint at the end of your Camel route, e.g.:
Code Block |
---|
|
void advice(@Observes CamelContextStartingEvent event,
@Uri("mock:test") MockEndpoint messages,
ModelCamelContext context) throws Exception {
import org.junit.rules.Verifier;
@RunWith(CamelCdiRunner.class)
public class CamelCdiTest {
context.getRouteDefinition("route")@ClassRule
public static Verifier verifier .adviceWith(context,= new AdviceWithRouteBuilderVerifier() {
@Override
@Override
publicprotected void configureverify() {
// Executes after weaveAddLast().to("mock:test");
the CDI container has shutdown
}
});
} |
JUnit rules
...
See Also