ChartPanelTests.java
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.]
*
* --------------------
* ChartPanelTests.java
* --------------------
* (C) Copyright 2004, 2007, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 13-Jul-2004 : Version 1 (DG);
*
*/
package org.jfree.chart.junit;
import java.util.EventListener;
import javax.swing.event.CaretListener;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jfree.chart.ChartMouseEvent;
import org.jfree.chart.ChartMouseListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.XYPlot;
/**
* Tests for the {@link ChartPanel} class.
*/
public class ChartPanelTests extends TestCase implements ChartMouseListener {
/**
* Returns the tests as a test suite.
*
* @return The test suite.
*/
public static Test suite() {
return new TestSuite(ChartPanelTests.class);
}
/**
* Constructs a new set of tests.
*
* @param name the name of the tests.
*/
public ChartPanelTests(String name) {
super(name);
}
/**
* Test that the constructor will accept a null chart.
*/
public void testConstructor1() {
ChartPanel panel = new ChartPanel(null);
assertEquals(null, panel.getChart());
}
/**
* Test that it is possible to set the panel's chart to null.
*/
public void testSetChart() {
JFreeChart chart = new JFreeChart(new XYPlot());
ChartPanel panel = new ChartPanel(chart);
panel.setChart(null);
assertEquals(null, panel.getChart());
}
/**
* Check the behaviour of the getListeners() method.
*/
public void testGetListeners() {
ChartPanel p = new ChartPanel(null);
p.addChartMouseListener(this);
EventListener[] listeners = p.getListeners(
(Class) ChartMouseListener.class);
assertEquals(1, listeners.length);
assertEquals(this, listeners[0]);
// try a listener type that isn't registered
listeners = p.getListeners((Class) CaretListener.class);
assertEquals(0, listeners.length);
p.removeChartMouseListener(this);
listeners = p.getListeners((Class) ChartMouseListener.class);
assertEquals(0, listeners.length);
// try a null argument
boolean pass = false;
try {
listeners = p.getListeners((Class) null);
}
catch (NullPointerException e) {
pass = true;
}
assertTrue(pass);
// try a class that isn't a listener
pass = false;
try {
listeners = p.getListeners(Integer.class);
}
catch (ClassCastException e) {
pass = true;
}
assertTrue(pass);
}
public void chartMouseClicked(ChartMouseEvent event) {
// ignore
}
public void chartMouseMoved(ChartMouseEvent event) {
// ignore
}
}