使用Jersey Test，Grizzly和HK2依赖注射进行功能测试

Question

I'm attempting to write functional tests for my REST API using the Jersey Test framework. However, I've seem to hit a roadblock when it comes to using dependency injection within my functional tests. My main application looks like this:

@ApplicationPath("/")
public class Application extends ResourceConfig {

    private static final URI BASE_URI = URI.create("http://localhost:8080/api/");

    public static void main(String[] args) throws Exception {
        System.out.println("Starting application...");

        final ServiceLocator locator = ServiceLocatorUtilities.createAndPopulateServiceLocator();

        final ResourceConfig resourceConfig = new ResourceConfig();
        resourceConfig.register(JacksonFeature.class);
        resourceConfig.register(LoggingFeature.class);
        resourceConfig.packages(true, "my.package.name");

        final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(BASE_URI, resourceConfig, locator);

        Runtime.getRuntime().addShutdownHook(new Thread(server::shutdownNow));

        server.start();

        Thread.currentThread().join();
    }
}

Notice here that I'm using the HK2's ServiceLocatorUtilities.createAndPopulateServiceLocator() method in order to read the hk2-metadata-generator file. This method creates a ServiceLocator object which then in turn is passed to the GrizzlyHttpServerFactory.createHttpServer method. This all works great for running the Grizzly server, however, the question I have now is how do I create functional tests for my application with the Jersey Test Framework?

My unit test currently looks like this:

public class FormsResourceTest extends JerseyTest {

    @Override
    protected TestContainerFactory getTestContainerFactory() throws TestContainerException {
        return new GrizzlyWebTestContainerFactory();
    }

    @Test
    public void testMe() {
        Response response = target("/test").request().get();
        assertEquals("Should return status 200", 200, response.getStatus());
    }

}

Is there even a way to use the HK2 service locator with the Jersey Test framework or do I need to treat my application as an external container and use the external container provider as documented here: External container ?

Also, since these are functional tests, mocking the injected services is not an option here.

Answer 1

You can use the Locator Bridge to take two separate locator (the one you created and the one from Jersey) and bridge them together. The bridge can be made bi-directional as well (within limits) and so it'll appear in most normal usage to be one large ServiceLocator.

Note that there was a bug fixed this week with the ServiceLocator bridge which has not yet been pushed out to maven but will (probably) be pushed sometime next week. See HK2-295