Mocking EJB injection in tests

Question

Whenever I want to test a class which uses resource injection I end up including a constructor that will only be used within the test:

public class A {

             


        

Answer 1

According to this article (Mockito and Dependency Injection), Mockito has support for injecting mocked resources.

public class ATest
{
    @InjectMocks
    private A a; //this is your class under test into which the mocks will be injected.

    @Mock
    private B b; //this is the EJB to be injected.

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

}

You can also inject multiple mocks. Just declare them in the same way as we did for B b. The initMocks part can also be done in each test or in a BeforeClass setup method depending on your needs.