Question

What is the best way to integration test EJBs and REST-Resources?

Answer 1

You can do that through the EJB 3.1 EJBContainer API with a container that supports more than EJB lite. EJB lite is meant to be a minimum rather than a maximum.

I know OpenEJB supports JAX-RS embedded, not sure on others. If they support JAX-RS through an embedded Arquillian adapter, they should be able to support it via the standard EJBContainer API which is meant for Java SE usage like testing or standalone apps.

Here’s an example:

• http://openejb.apache.org/examples-trunk/rest-on-ejb

That one is not well documented, so here are the highlights.

First, include the Embedded container libraries. In this case that is the following maven dependency:

<dependency>
  <groupId>org.apache.openejb</groupId>
  <artifactId>openejb-cxf-rs</artifactId>
  <version>4.0.0-beta-3-SNAPSHOT</version>
  <scope>test</scope>
</dependency>

Then in your testcase, boot the EJBContainer:

final Properties properties = new Properties();
properties.setProperty("openejb.embedded.remotable", "true");
EJBContainer.createEJBContainer(properties);

You’re good to go, now you can send requests to your service. Using the CXF WebClient, that might look like this:

Response response = WebClient.create("http://localhost:4204/rest-on-ejb")
        .path("/user/create")
        .query("name", "dummy")
        .query("pwd", "unbreakable")
        .query("mail", "[e-mail]")
        .put(null);

// Then check the results via invoking the bean directly
List<User> list = service.list(0, 100);
for (User u : list) {
    if (!users.contains(u)) {
        service.delete(u.getId());
        return;
    }
}
fail("user was not added");

Of course plain URL or Commons HttpClient works as well.