ErrorMessages.java

package com.vaadin.tests.components;

import java.util.ArrayList;
import java.util.List;

import com.vaadin.server.CompositeErrorMessage;
import com.vaadin.server.UserError;
import com.vaadin.ui.Button;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.TextField;

public class ErrorMessages extends TestBase {

    @Override
    protected void setup() {
        Button bb = new Button("Button with CompositeError");
        List<UserError> errors = new ArrayList<>();
        errors.add(new UserError("Error 1"));
        errors.add(new UserError("Error 2"));
        bb.setComponentError(new CompositeErrorMessage(errors));
        addComponent(bb);

        TextField tf = new TextField("", "Textfield with UserError");
        tf.setComponentError(new UserError("This is a failure"));
        addComponent(tf);

        ComboBox<String> cb = new ComboBox<>(
                "ComboBox with description and UserError");
        cb.setDescription("This is a combobox");
        cb.setComponentError(new UserError("This is a failure"));
        addComponent(cb);

    }

    @Override
    protected String getDescription() {
        return "The components all have error messages that should appear when hovering them";
    }

    @Override
    protected Integer getTicketNumber() {
        return 3712;
    }

}