GWTP Test example - First pattern

ApplicationPresenter.java

package com.arcbees.client.application;

import com.arcbees.client.application.services.UserService;
import com.google.inject.Inject;
import com.google.web.bindery.event.shared.EventBus;
import com.gwtplatform.mvp.client.Presenter;
import com.gwtplatform.mvp.client.View;
import com.gwtplatform.mvp.client.annotations.ProxyStandard;
import com.gwtplatform.mvp.client.presenter.slots.NestedSlot;
import com.gwtplatform.mvp.client.proxy.Proxy;

public class ApplicationPresenter
        extends Presenter<ApplicationPresenter.MyView, ApplicationPresenter.MyProxy> {
    interface MyView extends View {
        void displayUsername(String username);
    }

    @ProxyStandard
    interface MyProxy extends Proxy<ApplicationPresenter> {
    }

    public static final NestedSlot SLOT_MAIN = new NestedSlot();
    
    private final UserService userService;

    @Inject
    ApplicationPresenter(
            EventBus eventBus,
            MyView view,
            MyProxy proxy,
            UserService userService) {
        super(eventBus, view, proxy, RevealType.Root);

        this.userService = userService;
    }

    @Override
    protected void onBind() {
        String username = userService.getUsername();

        getView().displayUsername(username);
    }
}

ApplicationPresenterTest.java

package com.arcbees.client.application;

import org.jukito.JukitoRunner;
import org.junit.Test;
import org.junit.runner.RunWith;

import com.arcbees.client.application.services.UserService;
import com.google.inject.Inject;

import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.verify;

@RunWith(JukitoRunner.class)
public class ApplicationPresenterTest {
    private static final String A_USERNAME = "bobby";
    
    @Inject
    private ApplicationPresenter presenter;
    @Inject
    private ApplicationPresenter.MyView view;
    @Inject
    UserService userService;

    @Test
    public void onBind_displayUsername() {
        given(userService.getUsername()).willReturn(A_USERNAME);

        presenter.onBind();

        verify(view).displayUsername(A_USERNAME);
    }
}