Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2012, 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.] * * -------------------------------- * CategoryTableXYDatasetTests.java * -------------------------------- * (C) Copyright 2005-2008, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 06-Oct-2005 : Version 1 (DG); * 22-Apr-2008 : Added testPublicCloneable (DG); * */ package org.jfree.data.xy.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.chart.util.PublicCloneable; import org.jfree.data.xy.CategoryTableXYDataset; /** * Tests for the {@link CategoryTableXYDataset} class. */ public class CategoryTableXYDatasetTest extends TestCase { /** * Returns the tests as a test suite. * * @return The test suite. */ public static Test suite() { return new TestSuite(CategoryTableXYDatasetTest.class); } /** * Constructs a new set of tests. * * @param name the name of the tests. */ public CategoryTableXYDatasetTest(String name) { super(name); } /** * Confirm that the equals method can distinguish all the required fields. */ public void testEquals() { CategoryTableXYDataset d1 = new CategoryTableXYDataset(); d1.add(1.0, 1.1, "Series 1"); d1.add(2.0, 2.2, "Series 1"); CategoryTableXYDataset d2 = new CategoryTableXYDataset(); d2.add(1.0, 1.1, "Series 1"); d2.add(2.0, 2.2, "Series 1"); assertTrue(d1.equals(d2)); assertTrue(d2.equals(d1)); d1.add(3.0, 3.3, "Series 1"); assertFalse(d1.equals(d2)); d2.add(3.0, 3.3, "Series 1"); assertTrue(d1.equals(d2)); } /** * Confirm that cloning works. */ public void testCloning() { CategoryTableXYDataset d1 = new CategoryTableXYDataset(); d1.add(1.0, 1.1, "Series 1"); d1.add(2.0, 2.2, "Series 1"); CategoryTableXYDataset d2 = null; try { d2 = (CategoryTableXYDataset) d1.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); } assertTrue(d1 != d2); assertTrue(d1.getClass() == d2.getClass()); assertTrue(d1.equals(d2)); d1.add(3.0, 3.3, "Series 1"); assertFalse(d1.equals(d2)); d2.add(3.0, 3.3, "Series 1"); assertTrue(d1.equals(d2)); d1.setIntervalPositionFactor(0.33); assertFalse(d1.equals(d2)); d2.setIntervalPositionFactor(0.33); assertTrue(d1.equals(d2)); } /** * Another check for cloning - making sure it works for a customised * interval delegate. */ public void testCloning2() { CategoryTableXYDataset d1 = new CategoryTableXYDataset(); d1.add(1.0, 1.1, "Series 1"); d1.add(2.0, 2.2, "Series 1"); d1.setIntervalWidth(1.23); CategoryTableXYDataset d2 = null; try { d2 = (CategoryTableXYDataset) d1.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); } assertTrue(d1 != d2); assertTrue(d1.getClass() == d2.getClass()); assertTrue(d1.equals(d2)); d1.add(3.0, 3.3, "Series 1"); assertFalse(d1.equals(d2)); d2.add(3.0, 3.3, "Series 1"); assertTrue(d1.equals(d2)); d1.setIntervalPositionFactor(0.33); assertFalse(d1.equals(d2)); d2.setIntervalPositionFactor(0.33); assertTrue(d1.equals(d2)); } /** * Verify that this class implements {@link PublicCloneable}. */ public void testPublicCloneable() { CategoryTableXYDataset d1 = new CategoryTableXYDataset(); assertTrue(d1 instanceof PublicCloneable); } /** * Serialize an instance, restore it, and check for equality. */ public void testSerialization() { CategoryTableXYDataset d1 = new CategoryTableXYDataset(); d1.add(1.0, 1.1, "Series 1"); d1.add(2.0, 2.2, "Series 1"); CategoryTableXYDataset 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 = (CategoryTableXYDataset) in.readObject(); in.close(); } catch (Exception e) { e.printStackTrace(); } assertEquals(d1, d2); } private static final double EPSILON = 0.0000000001; /** * This is a test for bug 1312066 - adding a new series should trigger a * recalculation of the interval width, if it is being automatically * calculated. */ public void testAddSeries() { CategoryTableXYDataset d1 = new CategoryTableXYDataset(); d1.setAutoWidth(true); d1.add(3.0, 1.1, "Series 1"); d1.add(7.0, 2.2, "Series 1"); assertEquals(3.0, d1.getXValue(0, 0), EPSILON); assertEquals(7.0, d1.getXValue(0, 1), EPSILON); assertEquals(1.0, d1.getStartXValue(0, 0), EPSILON); assertEquals(5.0, d1.getStartXValue(0, 1), EPSILON); assertEquals(5.0, d1.getEndXValue(0, 0), EPSILON); assertEquals(9.0, d1.getEndXValue(0, 1), EPSILON); // now add some more data d1.add(7.5, 1.1, "Series 2"); d1.add(9.0, 2.2, "Series 2"); assertEquals(3.0, d1.getXValue(1, 0), EPSILON); assertEquals(7.0, d1.getXValue(1, 1), EPSILON); assertEquals(7.5, d1.getXValue(1, 2), EPSILON); assertEquals(9.0, d1.getXValue(1, 3), EPSILON); assertEquals(7.25, d1.getStartXValue(1, 2), EPSILON); assertEquals(8.75, d1.getStartXValue(1, 3), EPSILON); assertEquals(7.75, d1.getEndXValue(1, 2), EPSILON); assertEquals(9.25, d1.getEndXValue(1, 3), EPSILON); // and check the first series too... assertEquals(2.75, d1.getStartXValue(0, 0), EPSILON); assertEquals(6.75, d1.getStartXValue(0, 1), EPSILON); assertEquals(3.25, d1.getEndXValue(0, 0), EPSILON); assertEquals(7.25, d1.getEndXValue(0, 1), EPSILON); } }