/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.wicket.markup.html.list;
import java.util.ArrayList;
import java.util.List;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.util.ListModel;
import org.apache.wicket.util.tester.WicketTestCase;
import org.junit.Test;
/**
* Test for ListView
*
* @author Juergen Donnerstag
*/
public class ListViewTest extends WicketTestCase
{
/**
* Create a predefined ListView
*
* @param modelListSize
* # of elements to go into the list
* @return list view
*/
private ListView<Integer> createListView(final int modelListSize)
{
ArrayList<Integer> modelList = new ArrayList<Integer>();
for (int i = 0; i < modelListSize; i++)
{
modelList.add(i);
}
return new ListView<Integer>("listView", new ListModel<Integer>(modelList))
{
private static final long serialVersionUID = 1L;
@Override
protected void populateItem(final ListItem<Integer> listItem)
{
// do nothing
}
};
}
/**
*/
@Test
public void generics()
{
// a listView for numbers
class NumberListView<N extends Number> extends ListView<N>
{
private static final long serialVersionUID = 1L;
// since the given list is not changed actually, we can safely
// accept lists accepting subtypes of numbers only
public NumberListView(String id, IModel<? extends List<N>> model)
{
super(id, model);
}
@Override
protected void populateItem(ListItem<N> item)
{
// non-fancy display of the number
add(new Label("label", item.getModel()));
}
}
;
IModel<List<Integer>> integers = new ListModel<>(new ArrayList<Integer>());
// pass list of integers to the number listView
new NumberListView<>("integers", integers);
}
/**
*
*/
@Test
public void listView()
{
ListView<Integer> lv = createListView(4);
assertEquals(4, lv.getList().size());
assertEquals(4, lv.getViewSize());
assertEquals(0, lv.getStartIndex());
// This is the number of ListViews child-components
assertEquals(0, lv.size());
lv.setStartIndex(-1);
assertEquals(0, lv.getStartIndex());
lv.setStartIndex(3);
assertEquals(3, lv.getStartIndex());
// The upper boundary doesn't get tested, yet.
lv.setStartIndex(99);
assertEquals(0, lv.getStartIndex());
lv.setViewSize(-1);
assertEquals(4, lv.getViewSize());
lv.setViewSize(0);
assertEquals(0, lv.getViewSize());
// The upper boundary doesn't get tested, yet.
lv.setViewSize(99);
assertEquals(4, lv.getViewSize());
lv.setStartIndex(1);
assertEquals(3, lv.getViewSize());
}
/**
*
*/
@Test
public void emptyListView()
{
// Empty tables
ListView<?> lv = createListView(0);
assertEquals(0, lv.getStartIndex());
assertEquals(0, lv.getViewSize());
// null tables are a special case used for table navigation
// bar, where there is no underlying model necessary, as
// listItem.getIndex() is equal to the required listItem.getModelObject()
lv = new ListView<Void>("listView", new ListModel<Void>())
{
private static final long serialVersionUID = 1L;
@Override
protected void populateItem(final ListItem<Void> listItem)
{
// do nothing
}
};
assertEquals(0, lv.getStartIndex());
assertEquals(0, lv.getViewSize());
lv.setStartIndex(5);
lv.setViewSize(10);
assertEquals(0, lv.getStartIndex());
assertEquals(0, lv.getViewSize());
}
}