vaadin-framework/uitest/src/main/java/com/vaadin/tests/components/table/ComponentsDisappearWhenScrolling.java

package com.vaadin.tests.components.table;

import com.vaadin.server.VaadinRequest;
import com.vaadin.shared.ui.ContentMode;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.Label;
import com.vaadin.v7.ui.Table;

public class ComponentsDisappearWhenScrolling extends AbstractTestUI {

    @Override
    protected void setup(VaadinRequest request) {
        Label label = new Label(getDescription(), ContentMode.HTML);
        addComponent(label);

        Table table = new Table();
        table.setSizeFull();
        table.setCacheRate(1.1);
        table.addContainerProperty(0, Button.class, null);
        for (int i = 0; i < 100; i++) {
            table.addItem(new Object[] { new Button() }, i);
        }
        addComponent(table);
    }

    @Override
    public String getDescription() {
        return "Scroll all the way down, then slowly back up. More often than"
                + " not this results in 'flattening' of several rows. This is "
                + "due to component connectors being unregistered on "
                + "components, which are on visible table rows.";
    }

    @Override
    protected Integer getTicketNumber() {
        return 7964;
    }

}