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    private SampleWidget sampleWidget; // do not initialize here, but at the end of the setUp() method...
    private SimpleEventBus = new SimpleEventBus();

    @Before
    public void setUp() {
        GwtMockito.useProviderForType(SimpleEventBus.class, new FakeProvider() {
            @Override
            public Object getFake(Class aClass) {
                return simpleEventBus;
            }

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public class SampleWidget implements IsWidget {
    private EventBus bus = GWT.create(SimpleEventBus.class);
    private VerticalPanel panel = GWT.create(VerticalPanel.class);

    public SampleWidget() {
        final Button button = GWT.create(Button.class);
        button.setText("Click me");
        final Label label = GWT.create(Label.class);
        button.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {

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package com.objectpartners.buesing.test;

public class EasyToMock {

	public String method() {
		return "EasyToMockValue";
	}
}

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package com.objectpartners.buesing.test;

public final class HardToMock {
	public final String finalMethod() {
		return "HardToMock value";
	}
	public final native String nativeMethod();
}

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package com.objectpartners.buesing.test;

import junit.framework.Assert;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;

import com.objectpartners.buesing.premock.PreMock;

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package com.objectpartners.buesing.premock;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Set;

import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.ParentRunner;
import org.junit.runners.model.FrameworkMethod;

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package com.objectpartners.buesing.premock;

import java.io.IOException;
import java.lang.reflect.Modifier;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javassist.CannotCompileException;
import javassist.ClassPool;

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package com.objectpartners.buesing.premock;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Retention(RetentionPolicy.RUNTIME)
public @interface PreMock {
	Class<?>[] value();
}