keyedobjectstests.java

jfreechart安装程序和使用说明

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ----------------------
 * KeyedObjectsTests.java
 * ----------------------
 * (C) Copyright 2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: KeyedObjectsTests.java,v 1.1 2004/08/31 15:31:05 mungady Exp $
 *
 * Changes
 * -------
 * 27-Jan-2004 : Version 1 (DG);
 *
 */

package org.jfree.data.junit;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.data.KeyedObjects;

/**
 * Tests for the {@link KeyedObjects} class.
 *
 */
public class KeyedObjectsTests extends TestCase {

    /**
     * Returns the tests as a test suite.
     *
     * @return the test suite.
     */
    public static Test suite() {
        return new TestSuite(KeyedObjectsTests.class);
    }

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public KeyedObjectsTests(final String name) {
        super(name);
    }

    /**
     * Common test setup.
     */
    protected void setUp() {
        // no setup required
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        final KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("V1", new Integer(1));
        ko1.addObject("V2", null);
        ko1.addObject("V3", new Integer(3));
        KeyedObjects ko2 = null;
        try {
            ko2 = (KeyedObjects) ko1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("KeyedObjectsTests.testCloning: failed to clone.");
        }
        assertTrue(ko1 != ko2);
        assertTrue(ko1.getClass() == ko2.getClass());
        assertTrue(ko1.equals(ko2));
    }
    
    /**
     * Problem that inserting and retrieving values works as expected.
     */
    public void testInsertAndRetrieve() {

        final KeyedObjects data = new KeyedObjects();
        data.addObject("A", new Double(1.0));
        data.addObject("B", new Double(2.0));
        data.addObject("C", new Double(3.0));
        data.addObject("D", null);

        // check key order
        assertEquals(data.getKey(0), "A");
        assertEquals(data.getKey(1), "B");
        assertEquals(data.getKey(2), "C");
        assertEquals(data.getKey(3), "D");

        // check retrieve value by key
        assertEquals(data.getObject("A"), new Double(1.0));
        assertEquals(data.getObject("B"), new Double(2.0));
        assertEquals(data.getObject("C"), new Double(3.0));
        assertEquals(data.getObject("D"), null);
        assertEquals(data.getObject("Not a key"), null);

        // check retrieve value by index
        assertEquals(data.getObject(0), new Double(1.0));
        assertEquals(data.getObject(1), new Double(2.0));
        assertEquals(data.getObject(2), new Double(3.0));
        assertEquals(data.getObject(3), null);

    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        final KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("Key 1", "Object 1");
        ko1.addObject("Key 2", null);
        ko1.addObject("Key 3", "Object 2");

        KeyedObjects ko2 = null;

        try {
            final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            final ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(ko1);
            out.close();

            final ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            ko2 = (KeyedObjects) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(ko1, ko2);

    }

}