Mocking a class that Verticle depends on

Question

I am playing with the Vert.x 3 framework/library. I have written a simple Verticle that has object dependencies managed via Spring IoC.

Here is the Verticle snippet

public class BookmarksVerticle extends AbstractVerticle {
    private static Logger log = LoggerFactory.getLogger(BookmarksVerticle.class);

    @Resource
    private BookmarkDao bookmarksDao;

Here is the Spring configuration snippet

@Bean 
public BookmarkDao bookmarksDao() {
    ...
}
@Bean 
public BookmarksVerticle bookmarkVerticle() {
     return new BookmarksVerticle();
}   

That is all working great. So wanted to write up some tests. I am using the vertx-unit testing and was trying to mock the DAO

Here is what I have

@RunWith(VertxUnitRunner.class)
public class BookmarksVerticleTest {

    int port = 8888;
    private Vertx vertx;

    @Mock(name = "BookmarkDao")
    BookmarkDao mockDao;
    @InjectMocks
    BookmarksVerticle bmVerticle;

    @Before
    public void init(TestContext context) {
        MockitoAnnotations.initMocks(this);

        vertx = Vertx.vertx();
        DeploymentOptions options = new DeploymentOptions().setConfig(new JsonObject().put("http.port", port));
        vertx.deployVerticle(bmVerticle, options, context.asyncAssertSuccess());
    }

However when I run the test I get NPE

SEVERE: NULL
java.lang.NullPointerException
    at vertx.pragprog.bookmarks.BookmarksVerticle.asynchRetrieveBookmark(BookmarksVerticle.java:169)
    at vertx.pragprog.bookmarks.BookmarksVerticle.lambda$1(BookmarksVerticle.java:88)
    at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$14(ContextImpl.java:279)
    at io.vertx.core.impl.OrderedExecutorFactory$OrderedExecutor.lambda$new$161(OrderedExecutorFactory.java:91)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

The line that triggers the exception is where I access the DAO

        Bookmark bm = bookmarksDao.getBookmark(id);

The mockDao is not being injected into the Verticle.

Any ideas on why this might be the case?

UPDATE:

Tried removing the Mockito automatically creating classes by adding a setter method for the DAO on BookmarksVerticle and then changed the setup method in the unit test as follows:

@Before
public void setUp(TestContext context) {    
    log.info("setting up...");
    //MockitoAnnotations.initMocks(this);

    mockDao = mock(BookmarkDao.class);
    bmVerticle = new BookmarksVerticle();
    bmVerticle.setBookmarkDao(mockDao);

    vertx = Vertx.vertx();
    DeploymentOptions options = new DeploymentOptions().setConfig(new JsonObject().put("http.port", port));
    vertx.deployVerticle(bmVerticle, options, context.asyncAssertSuccess());
}

Even with this approach I am still getting NPE

UPDATE 2

I removed vertx and the VertxUnitRunner from the mix by testing a method on BookmarksVerticle that did not have any dependencies on vertx but used the DAO class.

public class BookmarksServiceTest {

    @Mock(name = "BookmarkDao")
    BookmarkDao mockDao;
    @InjectMocks
    BookmarksVerticle bmVerticle;

    @Before
    public void setUp() {   
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void test_retrieveBookmark() {
        String id = "1";
        when(mockDao.getBookmark(Matchers.anyString())).thenReturn(new Bookmark(id, "url", "Vert.x"));

        Bookmark bm = bmVerticle.retrieveBookmark(id);
        assertNotNull(bm);
        assertEquals(id, bm.getBookmarkId());
        assertEquals("Vert.x", bm.getBookmarkTitle());
    }

}

This works great! It seems that the VertxUnitRunner may be interfering with Mockito in some way.

Thanks

Answer 1

Good news is Mockito works with VertxUnitRunner! It turns out using Maven on the command line and from Eclipse was messing me up. Once I switched out the embedded maven to use the same maven install as I was using from the command line things started working.

Here are the details from another answer: Successful build in Maven still showing errors in Eclipse

Answer 2

Does BookmarksVerticle have non-default constructors?

The documentation for @InjectMocks states that field injection will not happen in that case.

See here: http://docs.mockito.googlecode.com/hg/1.9.5/org/mockito/InjectMocks.html