objectutilitiestests.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 205 行

/* ========================================================================
 * JCommon : a free general purpose class library for the Java(tm) platform
 * ========================================================================
 *
 * (C) Copyright 2000-2005, 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.]
 * 
 * ---------------------
 * ObjectUtilsTests.java
 * ---------------------
 * (C) Copyright 2004, 2005, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ObjectUtilitiesTests.java,v 1.2 2005/02/23 12:59:51 mungady Exp $
 *
 * Changes
 * -------
 * 15-Sep-2004 : Version 1 (DG);
 * 25-Nov-2004 : Added new checks (DG);
 *
 */

package org.jfree.util.junit;

import java.awt.Point;
import java.util.ArrayList;
import java.util.Collection;

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

import org.jfree.util.ObjectUtilities;

/**
 * Some tests for the {@link ObjectUtilities} class.
 */
public class ObjectUtilitiesTests extends TestCase {

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

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

    /**
     * Some checks for the clone(Object) method.  The method should
     * have these properties:
     * 
     * (1) Return a clone for any object that can be cloned;
     * (2) Throw a NullPointerException for any object that cannot be cloned;
     * (3) Throw an IllegalArgumentException for null.
     * 
     * @throws CloneNotSupportedException if there is a problem cloning.
     */
    public void testCloneObject() throws CloneNotSupportedException {
        Object obj;
        Object clone;
        
        // check String (not Cloneable)
        boolean pass = false;
        obj = "Hello World";  
        try {
            clone = ObjectUtilities.clone(obj);
            pass = false;
        }
        catch (CloneNotSupportedException e) {
            pass = true;
        }
        assertTrue(pass);
        
        // check Integer (not Cloneable)
        pass = false;
        obj = new Integer(123); 
        try {
            clone = ObjectUtilities.clone(obj);
            pass = false;
        }
        catch (CloneNotSupportedException e) {
            pass = true;
        }
        assertTrue(pass);
        
        // check Point (Cloneable)
        obj = new Point(1, 2);  
        clone = ObjectUtilities.clone(obj);
        assertEquals(obj, clone);

        // check null (should throw an IllegalArgumentException)
        obj = null;  
        try {
            clone = ObjectUtilities.clone(obj);
            pass = false;
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }
    
    /**
     * Some checks for the deepClone(Collection) method.
     */
    public void testDeepClone() {
        Collection c1 = new ArrayList();
        Collection c2 = null;
        
        // empty list
        try {
            c2 = ObjectUtilities.deepClone(c1);
            assertTrue(c2.isEmpty());
        }
        catch (CloneNotSupportedException e) {
            assertTrue(false);
        }
        
        // list containing Cloneable objects
        c1 = new ArrayList();
        c1.add(new Point(1, 2));
        c1.add(new Point(3, 4));
        try {
            c2 = ObjectUtilities.deepClone(c1);
            assertEquals(2, c2.size());
            assertTrue(c2.contains(new Point(1, 2)));
            assertTrue(c2.contains(new Point(3, 4)));
        }
        catch (CloneNotSupportedException e) {
            assertTrue(false);
        }

        // list containing Cloneable and null objects
        c1 = new ArrayList();
        c1.add(new Point(1, 2));
        c1.add(null);
        c1.add(new Point(3, 4));
        try {
            c2 = ObjectUtilities.deepClone(c1);
            assertEquals(3, c2.size());
            assertTrue(c2.contains(new Point(1, 2)));
            assertTrue(c2.contains(new Point(3, 4)));
        }
        catch (CloneNotSupportedException e) {
            assertTrue(false);
        }
        
        // list containing non-Cloneable objects
        c1.clear();
        c1.add("S1");
        c1.add("S2");
        try {
            c2 = ObjectUtilities.deepClone(c1);
            assertTrue(false);  // if we get to here, the test has failed
        }
        catch (CloneNotSupportedException e) {
            assertTrue(true);
        }
        
        // null list
        try {
            c2 = ObjectUtilities.deepClone(null);
            assertTrue(false);  // if we get to here, the test has failed
        }
        catch (IllegalArgumentException e) {
            assertTrue(true);
        }
        catch (CloneNotSupportedException e) {
            assertTrue(false);
        }

    }

}