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jfreechart example source code file (DefaultCategoryDatasetTests.java)

This example jfreechart source code file (DefaultCategoryDatasetTests.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

c1, c1, c2, clonenotsupportedexception, defaultcategorydataset, defaultcategorydataset, defaultcategorydatasettests, illegalargumentexception, io, r1, r1, r2, r2, unknownkeyexception, xx

The jfreechart DefaultCategoryDatasetTests.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.]
 *
 * --------------------------------
 * DefaultCategoryDatasetTests.java
 * --------------------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 23-Mar-2004 : Version 1 (DG);
 * 08-Mar-2007 : Added testCloning() (DG);
 * 21-Nov-2007 : Added testBug1835955() method (DG);
 * 09-May-2008 : Added testPublicCloneable() (DG);
 *
 */

package org.jfree.data.category.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.UnknownKeyException;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.util.PublicCloneable;

/**
 * Tests for the {@link DefaultCategoryDataset} class.
 */
public class DefaultCategoryDatasetTests extends TestCase {

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

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

    /**
     * Some checks for the getValue() method.
     */
    public void testGetValue() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        d.addValue(1.0, "R1", "C1");
        assertEquals(new Double(1.0), d.getValue("R1", "C1"));
        boolean pass = false;
        try {
            d.getValue("XX", "C1");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;
        try {
            d.getValue("R1", "XX");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * A simple check for the getValue(int, int) method.
     */
    public void testGetValue2() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        boolean pass = false;
        try {
            /* Number n =*/ d.getValue(0, 0);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the incrementValue() method.
     */
    public void testIncrementValue() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        d.addValue(1.0, "R1", "C1");
        d.incrementValue(2.0, "R1", "C1");
        assertEquals(new Double(3.0), d.getValue("R1", "C1"));

        // increment a null value
        d.addValue(null, "R2", "C1");
        d.incrementValue(2.0, "R2", "C1");
        assertEquals(new Double(2.0), d.getValue("R2", "C1"));

        // increment an unknown row
        boolean pass = false;
        try {
            d.incrementValue(1.0, "XX", "C1");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

        // increment an unknown column
        pass = false;
        try {
            d.incrementValue(1.0, "R1", "XX");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some tests for the getRowCount() method.
     */
    public void testGetRowCount() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        assertTrue(d.getRowCount() == 0);

        d.addValue(1.0, "R1", "C1");
        assertTrue(d.getRowCount() == 1);

        d.addValue(1.0, "R2", "C1");
        assertTrue(d.getRowCount() == 2);

        d.addValue(2.0, "R2", "C1");
        assertTrue(d.getRowCount() == 2);

        // a row of all null values is still counted...
        d.setValue(null, "R2", "C1");
        assertTrue(d.getRowCount() == 2);
    }

    /**
     * Some tests for the getColumnCount() method.
     */
    public void testGetColumnCount() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        assertTrue(d.getColumnCount() == 0);

        d.addValue(1.0, "R1", "C1");
        assertTrue(d.getColumnCount() == 1);

        d.addValue(1.0, "R1", "C2");
        assertTrue(d.getColumnCount() == 2);

        d.addValue(2.0, "R1", "C2");
        assertTrue(d.getColumnCount() == 2);

        // a column of all null values is still counted...
        d.setValue(null, "R1", "C2");
        assertTrue(d.getColumnCount() == 2);
    }

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        DefaultCategoryDataset d1 = new DefaultCategoryDataset();
        d1.setValue(23.4, "R1", "C1");
        DefaultCategoryDataset d2 = new DefaultCategoryDataset();
        d2.setValue(23.4, "R1", "C1");
        assertTrue(d1.equals(d2));
        assertTrue(d2.equals(d1));

        d1.setValue(36.5, "R1", "C2");
        assertFalse(d1.equals(d2));
        d2.setValue(36.5, "R1", "C2");
        assertTrue(d1.equals(d2));

        d1.setValue(null, "R1", "C1");
        assertFalse(d1.equals(d2));
        d2.setValue(null, "R1", "C1");
        assertTrue(d1.equals(d2));
    }

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

        DefaultCategoryDataset d1 = new DefaultCategoryDataset();
        d1.setValue(23.4, "R1", "C1");
        DefaultCategoryDataset d2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(d1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            d2 = (DefaultCategoryDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(d1, d2);

    }

    /**
     * Some checks for the addValue() method.
     */
    public void testAddValue() {
        DefaultCategoryDataset d1 = new DefaultCategoryDataset();
        d1.addValue(null, "R1", "C1");
        assertNull(d1.getValue("R1", "C1"));
        d1.addValue(new Double(1.0), "R2", "C1");
        assertEquals(new Double(1.0), d1.getValue("R2", "C1"));

        boolean pass = false;
        try {
            d1.addValue(new Double(1.1), null, "C2");
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some basic checks for the removeValue() method.
     */
    public void testRemoveValue() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        d.removeValue("R1", "C1");
        d.addValue(new Double(1.0), "R1", "C1");
        d.removeValue("R1", "C1");
        assertEquals(0, d.getRowCount());
        assertEquals(0, d.getColumnCount());

        d.addValue(new Double(1.0), "R1", "C1");
        d.addValue(new Double(2.0), "R2", "C1");
        d.removeValue("R1", "C1");
        assertEquals(new Double(2.0), d.getValue(0, 0));

        boolean pass = false;
        try {
            d.removeValue(null, "C1");
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;
        try {
            d.removeValue("R1", null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DefaultCategoryDataset d1 = new DefaultCategoryDataset();
        DefaultCategoryDataset d2 = null;
        try {
            d2 = (DefaultCategoryDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));

        // try a dataset with some content...
        d1.addValue(1.0, "R1", "C1");
        d1.addValue(2.0, "R1", "C2");
        try {
            d2 = (DefaultCategoryDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));

        // check that the clone doesn't share the same underlying arrays.
        d1.addValue(3.0, "R1", "C1");
        assertFalse(d1.equals(d2));
        d2.addValue(3.0, "R1", "C1");
        assertTrue(d1.equals(d2));
    }

    /**
     * Check that this class implements PublicCloneable.
     */
    public void testPublicCloneable() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        assertTrue(d instanceof PublicCloneable);
    }

    private static final double EPSILON = 0.0000000001;

    /**
     * A test for bug 1835955.
     */
    public void testBug1835955() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        d.addValue(1.0, "R1", "C1");
        d.addValue(2.0, "R2", "C2");
        d.removeColumn("C2");
        d.addValue(3.0, "R2", "C2");
        assertEquals(3.0, d.getValue("R2", "C2").doubleValue(), EPSILON);
    }

    /**
     * Some checks for the removeColumn(Comparable) method.
     */
    public void testRemoveColumn() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        d.addValue(1.0, "R1", "C1");
        d.addValue(2.0, "R2", "C2");
        assertEquals(2, d.getColumnCount());
        d.removeColumn("C2");
        assertEquals(1, d.getColumnCount());

        boolean pass = false;
        try {
            d.removeColumn("XXX");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;
        try {
            d.removeColumn(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the removeRow(Comparable) method.
     */
    public void testRemoveRow() {
        DefaultCategoryDataset d = new DefaultCategoryDataset();
        d.addValue(1.0, "R1", "C1");
        d.addValue(2.0, "R2", "C2");
        assertEquals(2, d.getRowCount());
        d.removeRow("R2");
        assertEquals(1, d.getRowCount());

        boolean pass = false;
        try {
            d.removeRow("XXX");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;
        try {
            d.removeRow(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

}

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