vaadin-framework/uitest/src/main/java/com/vaadin/tests/components/combobox/ComboBoxBorder.java

package com.vaadin.tests.components.combobox;

import java.util.Arrays;

import com.vaadin.server.UserError;
import com.vaadin.tests.components.TestBase;
import com.vaadin.ui.ComboBox;

public class ComboBoxBorder extends TestBase {

    @Override
    protected void setup() {
        setTheme("tests-tickets");

        final ComboBox<String> cb = new ComboBox<>("All errors",
                Arrays.asList("Error", "Error 2"));
        cb.setStyleName("ComboBoxBorder");
        cb.setWidth("200px"); // must have with to reproduce

        cb.addValueChangeListener(
                event -> cb.setComponentError(new UserError("Error")));

        addComponent(cb);

    }

    @Override
    protected String getDescription() {
        return "Adding a border as a result of styleName change should not break the ComboBox";
    }

    @Override
    protected Integer getTicketNumber() {
        return 11267;
    }

}