/* ===========================================================
* JFreeChart : a free chart 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., 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.]
*
* --------------------------
* HistogramDatasetTests.java
* --------------------------
* (C) Copyright 2004, 2005, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: HistogramDatasetTests.java,v 1.4.2.2 2005/10/25 21:34:59 mungady Exp $
*
* Changes
* -------
* 01-Mar-2004 : Version 1 (DG);
* 08-Jun-2005 : Added test for getSeriesKey(int) bug (DG);
*
*/
package org.jfree.data.statistics.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.statistics.HistogramDataset;
/**
* Tests for the {@link HistogramDataset} class.
*/
public class HistogramDatasetTests extends TestCase {
/**
* Returns the tests as a test suite.
*
* @return The test suite.
*/
public static Test suite() {
return new TestSuite(HistogramDatasetTests.class);
}
/**
* Constructs a new set of tests.
*
* @param name the name of the tests.
*/
public HistogramDatasetTests(String name) {
super(name);
}
private static final double EPSILON = 0.0000000001;
/**
* Some checks that the correct values are assigned to bins.
*/
public void testBins() {
double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
HistogramDataset hd = new HistogramDataset();
hd.addSeries("Series 1", values, 5);
assertEquals(hd.getYValue(0, 0), 3.0, EPSILON);
assertEquals(hd.getYValue(0, 1), 3.0, EPSILON);
assertEquals(hd.getYValue(0, 2), 2.0, EPSILON);
assertEquals(hd.getYValue(0, 3), 0.0, EPSILON);
assertEquals(hd.getYValue(0, 4), 1.0, EPSILON);
}
/**
* Confirm that the equals method can distinguish all the required fields.
*/
public void testEquals() {
double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
HistogramDataset d1 = new HistogramDataset();
d1.addSeries("Series 1", values, 5);
HistogramDataset d2 = new HistogramDataset();
d2.addSeries("Series 1", values, 5);
assertTrue(d1.equals(d2));
assertTrue(d2.equals(d1));
}
/**
* Confirm that cloning works.
*/
public void testCloning() {
double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
HistogramDataset d1 = new HistogramDataset();
d1.addSeries("Series 1", values, 5);
HistogramDataset d2 = null;
try {
d2 = (HistogramDataset) d1.clone();
}
catch (CloneNotSupportedException e) {
System.err.println("Failed to clone.");
}
assertTrue(d1 != d2);
assertTrue(d1.getClass() == d2.getClass());
assertTrue(d1.equals(d2));
}
/**
* Serialize an instance, restore it, and check for equality.
*/
public void testSerialization() {
double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
HistogramDataset d1 = new HistogramDataset();
d1.addSeries("Series 1", values, 5);
HistogramDataset 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 = (HistogramDataset) in.readObject();
in.close();
}
catch (Exception e) {
System.out.println(e.toString());
}
assertEquals(d1, d2);
}
/**
* A test for a bug reported in the forum where the series name isn't being
* returned correctly.
*/
public void testGetSeriesKey() {
double[] values = {1.0, 2.0, 3.0, 4.0, 6.0, 12.0, 5.0, 6.3, 4.5};
HistogramDataset d1 = new HistogramDataset();
d1.addSeries("Series 1", values, 5);
assertEquals("Series 1", d1.getSeriesKey(0));
}
}