My code:
@Component
public class A {
@Autowired
private B b;
public void method() {}
}
public interface X {...}
@Component
public class B implements X {
...
}
I want to test in isolation class A. Do I have to mock class B? If yes, how? Because it is autowired and there is no setter where i could send the mocked object.
Best Answer
You should absolutely mock B, rather than instantiate and inject an instance of B. The point is to test A whether or not B works, so you should not allow a potentially broken B interfere with the testing of A.
That said, I highly recommend Mockito. As mocking frameworks go, it is extremely easy to use. You would write something like the following: