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

/*
 * Copyright 2000-2016 Vaadin Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.vaadin.tests.application;

import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractReindeerTestUIWithLog;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Component;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.SelectiveRenderer;

public class MissingHierarchyDetection extends AbstractReindeerTestUIWithLog {

    private boolean isChildRendered = true;
    private BrokenCssLayout brokenLayout = new BrokenCssLayout();

    private CssLayout normalLayout = new CssLayout(
            new Label("Normal layout child"));

    public class BrokenCssLayout extends CssLayout
            implements SelectiveRenderer {
        public BrokenCssLayout() {
            setCaption("Broken layout");
            Label label = new Label("Child component");
            label.setId("label");
            addComponent(label);
        }

        @Override
        public boolean isRendered(Component childComponent) {
            return isChildRendered;
        }
    }

    @Override
    protected void setup(VaadinRequest request) {
        addComponent(brokenLayout);
        addComponent(normalLayout);
        addComponent(new Button("Toggle properly", new Button.ClickListener() {
            @Override
            public void buttonClick(ClickEvent event) {
                toggle(true);
            }
        }));
        addComponent(
                new Button("Toggle improperly", new Button.ClickListener() {
                    @Override
                    public void buttonClick(ClickEvent event) {
                        toggle(false);
                    }
                }));
    }

    private void toggle(boolean properly) {
        isChildRendered = !isChildRendered;
        if (properly) {
            brokenLayout.markAsDirtyRecursive();
        }

        normalLayout.getComponent(0).setVisible(isChildRendered);
        // Must also have a state change of the layout to trigger special case
        // related to optimizations
        normalLayout.setCaption("With child: " + isChildRendered);
    }
}