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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2013, 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.]
*
* -----------------
* PieChartTest.java
* -----------------
* (C) Copyright 2002-2013, 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;
import org.jfree.chart.event.ChartChangeEvent;
import org.jfree.chart.event.ChartChangeListener;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
/**
* Tests for a pie chart.
*
*/
public class PieChartTest {
/** A chart. */
private JFreeChart pieChart;
/**
* Common test setup.
*/
@Before
public 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.
*/
@Test
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() {
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));
return ChartFactory.createPieChart("Pie Chart", data);
}
/**
* A chart change listener.
*
*/
static class LocalListener implements ChartChangeListener {
/** A flag. */
private boolean flag;
/**
* Event handler.
*
* @param event the event.
*/
@Override
public void chartChanged(ChartChangeEvent event) {
this.flag = true;
}
}
}
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