Initialization problems while testing a GWTP Presenter

[Nils Werner]

Hello :)

I am new to GWTP and Jukito. I am working on a webapp with the following sourcecode, which I simplified for your better understanding:

public class ClassA {
    ClassB classB = null;
   
    public void setClassB(ClassB classB) {
        this.classB = classB;
    }
   
    public void reset() {
        classB = null;
    }
}

public class ClassB {
    String text;
   
    public String getText() {
        return text;
    }
   
    public void setText(String text) {
        this.text = text;
    }
}

public class PresenterClass extends Presenter<PresenterClass.IView, PresenterClass.IProxy> {
    public void interface IView extends View {
        void setText(String text);
    }
   
    @ProxyStandard
    public interfcae IProxy extends ProxyPlace<PresenterClass> {
    }
   
    private final ClassA classA;
   
    @Inject
    PresenterClass(final EventBus eventBus, final IView view, final IProxy proxy, final ClassA classA) {
        super(eventBus, view, proxy, RevealType.RootLayout);
       
        this.classA = classA;
    }
   
    @Override
    protected void onReveal() {
        super.onReveal();
       
        String text;
        if(classA.getClassB() != null && (text = classA.getClassB().getText()) != null)
            getView().setText(text);
    }
}

public class ViewClass extends ViewImpl implements PresenterClass.IView {
    interface Binder extends UiBinder<Widget, ViewClass> {
    }
   
    @UiField
    TextBox text;
   
    @Inject
    ViewClass(final Binder uiBinder) {
        initWidget(uiBinder.createAndBindUi(this));
    }
   
    @Override
    public void setText(String text) {
        this.text.setText(text);
    }
}

public class AppModule extends AbstractPresenterModule {
    @Override
    protected void configure() {
        install(new DefaultModule());
       
        bind(ClassA.class).asEagerSingleton();
       
        bindPresenter(PresenterClass.class, PresenterClass.IView.class, ViewClass.class, PresenterClass.IProxy.class);
    }
}

@RunWith(JukitoRunner.class)
public class PresenterClassTest {
    @Inject
    PresenterClass presenter;
   
    @Test
    public void shouldSetTextOnReveal(ClassA classA, PresenterClass.IView view) {
        // given
        String text = "dummy";
       
        // when
        presenter.onReveal();
       
        // then
        verify(view).setText(text);
    }
}

The app is working like I expect it, but the test is failing. The problem is that the getView().setText(text) Method ist never called, because the text in ClassB in ClassA is null. So I should initialize it in the test, but how do I do this correctly?
I've been testing for a while, but without success.

I hope someone has a helpfull hint.

Greeting from germany ;)