Spring Framework example source code file (AutoPopulatingListTests.java)

This example Spring Framework source code file (AutoPopulatingListTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

autopopulatinglist, autopopulatinglist, element, exception, exception, hello, linkedlist, mockelementfactory, object, object, string, testbean, testbean, testcase, util

The Spring Framework AutoPopulatingListTests.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * 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 org.springframework.util;

import java.util.LinkedList;

import junit.framework.TestCase;

import org.springframework.beans.TestBean;

/**
 * @author Rob Harrop
 * @author Juergen Hoeller
 */
public class AutoPopulatingListTests extends TestCase {

	public void testWithClass() throws Exception {
		doTestWithClass(new AutoPopulatingList(TestBean.class));
	}

	public void testWithClassAndUserSuppliedBackingList() throws Exception {
		doTestWithClass(new AutoPopulatingList(new LinkedList(), TestBean.class));
	}

	public void testWithElementFactory() throws Exception {
		doTestWithElementFactory(new AutoPopulatingList(new MockElementFactory()));
	}

	public void testWithElementFactoryAndUserSuppliedBackingList() throws Exception {
		doTestWithElementFactory(new AutoPopulatingList(new LinkedList(), new MockElementFactory()));
	}

	private void doTestWithClass(AutoPopulatingList list) {
		Object lastElement = null;
		for (int x = 0; x < 10; x++) {
			Object element = list.get(x);
			assertNotNull("Element is null", list.get(x));
			assertTrue("Element is incorrect type", element instanceof TestBean);
			assertNotSame(lastElement, element);
			lastElement = element;
		}

		String helloWorld = "Hello World!";
		list.add(10, null);
		list.add(11, helloWorld);
		assertEquals(helloWorld, list.get(11));

		assertTrue(list.get(10) instanceof TestBean);
		assertTrue(list.get(12) instanceof TestBean);
		assertTrue(list.get(13) instanceof TestBean);
		assertTrue(list.get(20) instanceof TestBean);
	}

	private void doTestWithElementFactory(AutoPopulatingList list) {
		doTestWithClass(list);

		for(int x = 0; x < list.size(); x++) {
			Object element = list.get(x);
			if(element instanceof TestBean) {
				assertEquals(x, ((TestBean) element).getAge());
			}
		}
	}

	public void testSerialization() throws Exception {
		AutoPopulatingList list = new AutoPopulatingList(TestBean.class);
		assertEquals(list, SerializationTestUtils.serializeAndDeserialize(list));
	}


	private static class MockElementFactory implements AutoPopulatingList.ElementFactory {

		public Object createElement(int index) {
			TestBean bean = new TestBean();
			bean.setAge(index);
			return bean;
		}
	}

}