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jfreechart example source code file (KeyToGroupMapTests.java)

This example jfreechart source code file (KeyToGroupMapTests.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

default, default, g1, g1, g2, g3, group, group, io, k1, k2, keytogroupmap, keytogroupmap, keytogroupmaptests, test

The jfreechart KeyToGroupMapTests.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.]
 *
 * -----------------------
 * KeyToGroupMapTests.java
 * -----------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 29-Apr-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.KeyToGroupMap;

/**
 * Tests for the {@link KeyToGroupMap} class.
 */
public class KeyToGroupMapTests extends TestCase {

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

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

    /**
     * Tests the mapKeyToGroup() method.
     */
    public void testMapKeyToGroup() {
        KeyToGroupMap m1 = new KeyToGroupMap("G1");

        // map a key to the default group
        m1.mapKeyToGroup("K1", "G1");
        assertEquals("G1", m1.getGroup("K1"));

        // map a key to a new group
        m1.mapKeyToGroup("K2", "G2");
        assertEquals("G2", m1.getGroup("K2"));

        // clear a mapping
        m1.mapKeyToGroup("K2", null);
        assertEquals("G1", m1.getGroup("K2"));  // after clearing, reverts to
                                                // default group

        // check handling of null key
        boolean pass = false;
        try {
            m1.mapKeyToGroup(null, "G1");
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Tests that the getGroupCount() method returns the correct values under
     * various circumstances.
     */
    public void testGroupCount() {
        KeyToGroupMap m1 = new KeyToGroupMap("Default Group");

        // a new map always has 1 group (the default group)
        assertEquals(1, m1.getGroupCount());

        // if the default group is not mapped to, it should still count towards
        // the group count...
        m1.mapKeyToGroup("C1", "G1");
        assertEquals(2, m1.getGroupCount());

        // now when the default group is mapped to, it shouldn't increase the
        // group count...
        m1.mapKeyToGroup("C2", "Default Group");
        assertEquals(2, m1.getGroupCount());

        // complicate things a little...
        m1.mapKeyToGroup("C3", "Default Group");
        m1.mapKeyToGroup("C4", "G2");
        m1.mapKeyToGroup("C5", "G2");
        m1.mapKeyToGroup("C6", "Default Group");
        assertEquals(3, m1.getGroupCount());

        // now overwrite group "G2"...
        m1.mapKeyToGroup("C4", "G1");
        m1.mapKeyToGroup("C5", "G1");
        assertEquals(2, m1.getGroupCount());
    }

    /**
     * Tests that the getKeyCount() method returns the correct values under
     * various circumstances.
     */
    public void testKeyCount() {
        KeyToGroupMap m1 = new KeyToGroupMap("Default Group");

        // a new map always has 1 group (the default group)
        assertEquals(0, m1.getKeyCount("Default Group"));

        // simple case
        m1.mapKeyToGroup("K1", "G1");
        assertEquals(1, m1.getKeyCount("G1"));
        m1.mapKeyToGroup("K1", null);
        assertEquals(0, m1.getKeyCount("G1"));

        // if there is an explicit mapping to the default group, it is counted
        m1.mapKeyToGroup("K2", "Default Group");
        assertEquals(1, m1.getKeyCount("Default Group"));

        // complicate things a little...
        m1.mapKeyToGroup("K3", "Default Group");
        m1.mapKeyToGroup("K4", "G2");
        m1.mapKeyToGroup("K5", "G2");
        m1.mapKeyToGroup("K6", "Default Group");
        assertEquals(3, m1.getKeyCount("Default Group"));
        assertEquals(2, m1.getKeyCount("G2"));

        // now overwrite group "G2"...
        m1.mapKeyToGroup("K4", "G1");
        m1.mapKeyToGroup("K5", "G1");
        assertEquals(2, m1.getKeyCount("G1"));
        assertEquals(0, m1.getKeyCount("G2"));
    }

    /**
     * Tests the getGroupIndex() method.
     */
    public void testGetGroupIndex() {
        KeyToGroupMap m1 = new KeyToGroupMap("Default Group");

        // the default group is always at index 0
        assertEquals(0, m1.getGroupIndex("Default Group"));

        // a non-existent group should return -1
        assertEquals(-1, m1.getGroupIndex("G3"));

        // indices are assigned in the order that groups are originally mapped
        m1.mapKeyToGroup("K3", "G3");
        m1.mapKeyToGroup("K1", "G1");
        m1.mapKeyToGroup("K2", "G2");
        assertEquals(1, m1.getGroupIndex("G3"));
        assertEquals(2, m1.getGroupIndex("G1"));
        assertEquals(3, m1.getGroupIndex("G2"));
    }

    /**
     * Tests the getGroup() method.
     */
    public void testGetGroup() {
        KeyToGroupMap m1 = new KeyToGroupMap("Default Group");

        // a key that hasn't been mapped should return the default group
        assertEquals("Default Group", m1.getGroup("K1"));

        m1.mapKeyToGroup("K1", "G1");
        assertEquals("G1", m1.getGroup("K1"));
        m1.mapKeyToGroup("K1", "G2");
        assertEquals("G2", m1.getGroup("K1"));
        m1.mapKeyToGroup("K1", null);
        assertEquals("Default Group", m1.getGroup("K1"));

        // a null argument should throw an exception
        boolean pass = false;
        try {
            Comparable g = m1.getGroup(null);
            System.out.println(g);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        KeyToGroupMap m1 = new KeyToGroupMap("Default Group");
        KeyToGroupMap m2 = new KeyToGroupMap("Default Group");
        assertTrue(m1.equals(m2));
        assertTrue(m2.equals(m1));

        m1.mapKeyToGroup("K1", "G1");
        assertFalse(m1.equals(m2));
        m2.mapKeyToGroup("K1", "G1");
        assertTrue(m1.equals(m2));
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        KeyToGroupMap m1 = new KeyToGroupMap("Test");
        m1.mapKeyToGroup("K1", "G1");
        KeyToGroupMap m2 = null;
        try {
            m2 = (KeyToGroupMap) m1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(m1 != m2);
        assertTrue(m1.getClass() == m2.getClass());
        assertTrue(m1.equals(m2));

        // a small check for independence
        m1.mapKeyToGroup("K1", "G2");
        assertFalse(m1.equals(m2));
        m2.mapKeyToGroup("K1", "G2");
        assertTrue(m1.equals(m2));
    }

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

        KeyToGroupMap m1 = new KeyToGroupMap("Test");
        KeyToGroupMap m2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            m2 = (KeyToGroupMap) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(m1, m2);

    }

}

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