Question

Given this class:

 public SomeClass implements SomeInterface {

      @Autowired private RemoteService rService;

 }

And given this unit test:

 public SomeClassTest {

 ...
 SomeClass sc = (SomeClass) ctx.getbean("someService");
 ..
 }

I want to stub the ‘rService’ with some other object. I do not want to have to modify the SomeInterface method to expose any getters/setters since ‘rService’ only applies to just one implementation.

Answer 1

Besides just resetting the mock/stub of RemoteService through the setter injection within the test:

someClass.setRemoteService( remoteServiceMock );

(if the above does not work for you for some reason…) => you can create a “test-config.xml”, where the only bean you’d redefine is remoteService with the same (real) bean name, but with a stub implementation, so it can override the real bean:

<bean id="remoteService" class="org.your.package.remote.RemoteServiceStub"/>

where RemoteServiceStub would extend the RemoteService, so it can be autowired by type into SomeClass

Then in your test, inject SomeClass as you would normally do:

@ContextConfiguration(locations = { "classpath:/path/to/test-config.xml" })
@RunWith(SpringJUnit4ClassRunner.class)
public class MyBeanTest {

    @Autowired
    private SomeClass someClass;

    @Test
    public void someClassShouldBehave() {
        ...
    }
}