vaadin-framework/uitest/src/main/java/com/vaadin/tests/application/HelloWorld.java

package com.vaadin.tests.application;

import com.vaadin.server.VaadinRequest;
import com.vaadin.ui.UI;

/**
 * A simple application to simplify doing quick testing of features when a full
 * test case is not needed
 */
public class HelloWorld extends UI {

    @Override
    protected void init(VaadinRequest request) {

        // Type your code here...
    }
}