vaadin-framework/uitest/src/main/java/com/vaadin/tests/components/orderedlayout/InsertComponentInHorizontalLayout.java

package com.vaadin.tests.components.orderedlayout;

import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractReindeerTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Component;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.VerticalLayout;

public class InsertComponentInHorizontalLayout extends AbstractReindeerTestUI {
    private VerticalLayout layout;
    int added = 1;

    private Component getTestLayout() {
        ComboBox a = new ComboBox("initial");
        Button b = new Button("x", event -> layout.markAsDirty());
        final HorizontalLayout hl = new HorizontalLayout(a, b);
        hl.setSpacing(true);
        Button add = new Button(
                "Insert 2 comboboxes between combobox(es) and button 'x'");
        add.addClickListener(event -> {
            hl.addComponent(new ComboBox("Added " + added++), 1);
            hl.addComponent(new ComboBox("Added " + added++), 2);
        });
        layout = new VerticalLayout(hl, add);
        return layout;
    }

    @Override
    protected void setup(VaadinRequest request) {
        setContent(getTestLayout());
    }

    @Override
    protected String getTestDescription() {
        return "Click the button to add two comboboxes between the existing combobox(es) and the 'x' button";
    }

    @Override
    protected Integer getTicketNumber() {
        return 10154;
    }
}