listviewtest.java

Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容易而轻松。 Wicket利用一个POJO data beans组件使得它可以与任何持久层技术相结合。

/*
 * 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 junit.framework.TestCase;

import org.apache.wicket.model.Model;
import org.apache.wicket.util.tester.WicketTester;

/**
 * Test for ListView
 * 
 * @author Juergen Donnerstag
 */
public class ListViewTest extends TestCase
{
	/**
	 * Create a predefined ListView
	 * 
	 * @param modelListSize #
	 *            of elements to go into the list
	 * @return list view
	 */
	private ListView createListView(final int modelListSize)
	{
		ArrayList modelList = new ArrayList();
		for (int i = 0; i < modelListSize; i++)
		{
			modelList.add(new Integer(i));
		}

		return new ListView("listView", new Model(modelList))
		{
			private static final long serialVersionUID = 1L;

			protected void populateItem(final ListItem listItem)
			{
				// do nothing
			}
		};
	}

	/**
	 * 
	 */
	public void testListView()
	{
		WicketTester tester = new WicketTester();

		ListView 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());
	}

	/**
	 * 
	 */
	public void testEmptyListView()
	{
		WicketTester tester = new WicketTester();

		// 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("listView", new Model(null))
		{
			private static final long serialVersionUID = 1L;

			protected void populateItem(final ListItem listItem)
			{
				// do nothing
			}
		};
		assertEquals(0, lv.getStartIndex());
		assertEquals(0, lv.getViewSize());

		lv.setStartIndex(5);
		lv.setViewSize(10);
		assertEquals(0, lv.getStartIndex());
		assertEquals(10, lv.getViewSize());
	}
}