/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------------
* PieChartTests.java
* ------------------
* (C) Copyright 2002-2008, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes:
* --------
* 11-Jun-2002 : Version 1 (DG);
* 17-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
package org.jfree.chart.junit;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.event.ChartChangeEvent;
import org.jfree.chart.event.ChartChangeListener;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
/**
* Tests for a pie chart.
*
*/
public class PieChartTests extends TestCase {
/** A chart. */
private JFreeChart pieChart;
/**
* Returns the tests as a test suite.
*
* @return The test suite.
*/
public static Test suite() {
return new TestSuite(PieChartTests.class);
}
/**
* Constructs a new set of tests.
*
* @param name the name of the tests.
*/
public PieChartTests(String name) {
super(name);
}
/**
* Common test setup.
*/
protected void setUp() {
this.pieChart = createPieChart();
}
/**
* Using a regular pie chart, we replace the dataset with null. Expect to
* receive notification of a chart change event, and (of course) the
* dataset should be null.
*/
public void testReplaceDatasetOnPieChart() {
LocalListener l = new LocalListener();
this.pieChart.addChangeListener(l);
PiePlot plot = (PiePlot) this.pieChart.getPlot();
plot.setDataset(null);
assertEquals(true, l.flag);
assertNull(plot.getDataset());
}
/**
* Creates a pie chart.
*
* @return The pie chart.
*/
private static JFreeChart createPieChart() {
// create a dataset...
DefaultPieDataset data = new DefaultPieDataset();
data.setValue("Java", new Double(43.2));
data.setValue("Visual Basic", new Double(0.0));
data.setValue("C/C++", new Double(17.5));
// create the chart...
return ChartFactory.createPieChart("Pie Chart", // chart title
data, // data
true, // include legend
true,
false
);
}
/**
* A chart change listener.
*
*/
static class LocalListener implements ChartChangeListener {
/** A flag. */
private boolean flag = false;
/**
* Event handler.
*
* @param event the event.
*/
public void chartChanged(ChartChangeEvent event) {
this.flag = true;
}
}
}