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jfreechart example source code file (VectorTests.java)

This example jfreechart source code file (VectorTests.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 - jfreechart tags/keywords

bytearrayoutputstream, bytearrayoutputstream, cloneable, exception, io, objectinput, objectoutput, objectoutputstream, test, test, testcase, vector, vector, vectortests, vectortests

The jfreechart VectorTests.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ----------------
 * VectorTests.java
 * ----------------
 * (C) Copyright 2007, 2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 30-Jan-2007 : Version 1 (DG);
 *
 */

package org.jfree.data.xy.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.xy.Vector;

/**
 * Tests for the {@link Vector} class.
 */
public class VectorTests extends TestCase {

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

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

    /**
     * Test that the equals() method distinguishes all fields.
     */
    public void testEquals() {
        // default instances
        Vector v1 = new Vector(1.0, 2.0);
        Vector v2 = new Vector(1.0, 2.0);
        assertTrue(v1.equals(v2));
        assertTrue(v2.equals(v1));

        v1 = new Vector(1.1, 2.0);
        assertFalse(v1.equals(v2));
        v2 = new Vector(1.1, 2.0);
        assertTrue(v1.equals(v2));

        v1 = new Vector(1.1, 2.2);
        assertFalse(v1.equals(v2));
        v2 = new Vector(1.1, 2.2);
        assertTrue(v1.equals(v2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashcode() {
        Vector v1 = new Vector(1.0, 2.0);
        Vector v2 = new Vector(1.0, 2.0);
        assertTrue(v1.equals(v2));
        int h1 = v1.hashCode();
        int h2 = v2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Immutable class is not cloneable.
     */
    public void testCloning() {
        Vector v1 = new Vector(1.0, 2.0);
        assertFalse(v1 instanceof Cloneable);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        Vector v1 = new Vector(1.0, 2.0);
        Vector v2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(v1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            v2 = (Vector) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(v1, v2);
    }

}

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