org.mockito

Annotation Type InjectMocks

@Documented
@Target(value=FIELD)
@Retention(value=RUNTIME)
public @interface InjectMocks

• Allows shorthand mock and spy injection.
• Minimizes repetitive mock and spy injection.

Currently it only supports setter injection. If you prefer constructor injection - please contribute a patch.

Mockito tries to inject by type (using name in case types are the same). Mockito does not throw anything when injection fails - you will have to satisfy the dependencies manually.

Example:

   public class ArticleManagerTest extends SampleBaseTestCase {

       @Mock private ArticleCalculator calculator;
       @Mock private ArticleDatabase database;
       @Spy private UserProvider userProvider = new ConsumerUserProvider();

       @InjectMocks private ArticleManager manager = new ArticleManager();

       @Test public void shouldDoSomething() {
           manager.initiateArticle();
           verify(database).addListener(any(ArticleListener.class));
       }
   }

   public class SampleBaseTestCase {

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

The field annotated with @InjectMocks must be initialized.

MockitoAnnotations.injectMocks(this) method has to called to initialize annotated objects.

In above example, injectMocks() is called in @Before (JUnit4) method of test's base class. For JUnit3 injectMocks() can go to setup() method of a base class. You can also put injectMocks() in your JUnit runner (@RunWith) or use built-in runners: MockitoJUnitRunner