Can I use OSGi Mocks with Declarative Services Annotations

Question

I'm trying to test an OSGi service annodated with Declaratice Services annotations (org.osgi.service.component.annotations). I have generated my project based on the AEM Multi-Project Example.

public class PostServiceTest {

  @Rule
  public AemContext context = new AemContext((AemContextCallback) context -> {
    context.registerInjectActivateService(new PostService());
  }, ResourceResolverType.RESOURCERESOLVER_MOCK);

  @Test
  public void shouldFetchRandomPosts() {
    final PostService postsService = context.getService(PostService.class);
    final List<Post> posts = postsService.randomPosts(100);

    assertEquals(100, posts.size());
  }

}

Whenever I run this test in IntelliJ, OSGi Mocks complain about hte absence of SCR metadata on the tested class.

org.apache.sling.testing.mock.osgi.NoScrMetadataException: No OSGi SCR metadata found for class com.example.PostServiceTest
  at org.apache.sling.testing.mock.osgi.OsgiServiceUtil.injectServices(OsgiServiceUtil.java:381)
  at org.apache.sling.testing.mock.osgi.MockOsgi.injectServices(MockOsgi.java:148)
  at org.apache.sling.testing.mock.osgi.context.OsgiContextImpl.registerInjectActivateService(OsgiContextImpl.java:153)
  at org.apache.sling.testing.mock.osgi.context.OsgiContextImpl.registerInjectActivateService(OsgiContextImpl.java:168)
  at com.example.PostServiceTest.shouldReturnTheEnpointNamesWithValidConfigurationAsTheListOfAcceptableKeys(PostServiceTest.java:23)

Does this mean I can only test classes annotated with the older SCR annotations that come with Apache Felix? The documentation for OSGi Mocks suggests that Declarative Services annotations is supported in version 2.0.0 and higher. The version I'm using meets this criterion.

Answer 1

Interestingly enough, this only happened when I ran the test directly form the IDE. It turns out that IntelliJ was not generating the SCR metadata when compiling my classes for tests.

When I compile the class under test with Gradle, the 'com.cognifide.aem.bundle' plugin is used to generate the SCR descriptor and place it in the resulting Java Archive. That's why unit tests executed by Gradle work fine. Just clicking the Run button in IntelliJ caused this step to be missed.

In order to get this working, I ended up setting up IntelliJ to allow me to run unit tests via Gradle.

I went to Settings > Build, Execution, Deployment > Gradle > Runner and used the dropdown menu so that I could decide whether to use Gradle on a test-by-test basis.