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

package com.vaadin.tests.application;

import com.vaadin.annotations.PreserveOnRefresh;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUIWithLog;
import com.vaadin.ui.Label;

@PreserveOnRefresh
public class RefreshStatePreserve extends AbstractTestUIWithLog {

    @Override
    protected void setup(VaadinRequest request) {
        // Internal parameter sent by vaadinBootstrap.js,
        addComponent(new Label("window.name: " + request.getParameter("v-wn")));
        addComponent(new Label("UI id: " + getUIId()));

        log("Initial fragment: " + getPage().getUriFragment());
        getPage().addUriFragmentChangedListener(
                event -> log("Fragment changed to " + event.getUriFragment()));
    }

    @Override
    protected String getTestDescription() {
        return "Refreshing the browser window should preserve the state";
    }

    @Override
    protected Integer getTicketNumber() {
        return Integer.valueOf(8068);
    }
}