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.] * * ---------------------------- * DefaultOHLCDatasetTests.java * ---------------------------- * (C) Copyright 2005-2008, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 29-Apr-2005 : Version 1 (DG); * 28-Nov-2006 : Extended equals() test (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 java.util.Date; import junit.framework.Test; import junit.framework.TestCase; import junit.framework.TestSuite; import org.jfree.chart.util.PublicCloneable; import org.jfree.data.Range; import org.jfree.data.general.DatasetUtilities; import org.jfree.data.xy.DefaultOHLCDataset; import org.jfree.data.xy.OHLCDataItem; /** * Tests for the {@link DefaultOHLCDataset} class. */ public class DefaultOHLCDatasetTest extends TestCase { /** * Returns the tests as a test suite. * * @return The test suite. */ public static Test suite() { return new TestSuite(DefaultOHLCDatasetTest.class); } /** * Constructs a new set of tests. * * @param name the name of the tests. */ public DefaultOHLCDatasetTest(String name) { super(name); } private static final double EPSILON = 0.0000000001; /** * A small test for the data range calculated on this dataset. */ public void testDataRange() { OHLCDataItem[] data = new OHLCDataItem[3]; data[0] = new OHLCDataItem(new Date(11L), 2.0, 4.0, 1.0, 3.0, 100.0); data[1] = new OHLCDataItem(new Date(22L), 4.0, 9.0, 2.0, 5.0, 120.0); data[2] = new OHLCDataItem(new Date(33L), 3.0, 7.0, 3.0, 6.0, 140.0); DefaultOHLCDataset d = new DefaultOHLCDataset("S1", data); Range r = DatasetUtilities.findRangeBounds(d, true); assertEquals(1.0, r.getLowerBound(), EPSILON); assertEquals(9.0, r.getUpperBound(), EPSILON); } /** * Confirm that the equals method can distinguish all the required fields. */ public void testEquals() { DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", new OHLCDataItem[0]); DefaultOHLCDataset d2 = new DefaultOHLCDataset("Series 1", new OHLCDataItem[0]); assertTrue(d1.equals(d2)); assertTrue(d2.equals(d1)); d1 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[0]); assertFalse(d1.equals(d2)); d2 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[0]); assertTrue(d1.equals(d2)); d1 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[] { new OHLCDataItem(new Date(123L), 1.2, 3.4, 5.6, 7.8, 99.9) }); assertFalse(d1.equals(d2)); d2 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[] { new OHLCDataItem(new Date(123L), 1.2, 3.4, 5.6, 7.8, 99.9) }); assertTrue(d1.equals(d2)); } /** * Confirm that cloning works. */ public void testCloning() { DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", new OHLCDataItem[0]); DefaultOHLCDataset d2 = null; try { d2 = (DefaultOHLCDataset) d1.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); } assertTrue(d1 != d2); assertTrue(d1.getClass() == d2.getClass()); assertTrue(d1.equals(d2)); } /** * Confirm that cloning works. */ public void testCloning2() { OHLCDataItem item1 = new OHLCDataItem(new Date(1L), 1.0, 2.0, 3.0, 4.0, 5.0); OHLCDataItem item2 = new OHLCDataItem(new Date(2L), 6.0, 7.0, 8.0, 9.0, 10.0); // create an array of items in reverse order OHLCDataItem[] items = new OHLCDataItem[] { item2, item1 }; DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", items); DefaultOHLCDataset d2 = null; try { d2 = (DefaultOHLCDataset) d1.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); } assertTrue(d1 != d2); assertTrue(d1.getClass() == d2.getClass()); assertTrue(d1.equals(d2)); d1.sortDataByDate(); assertFalse(d1.equals(d2)); } /** * Verify that this class implements {@link PublicCloneable}. */ public void testPublicCloneable() { DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", new OHLCDataItem[0]); assertTrue(d1 instanceof PublicCloneable); } /** * Serialize an instance, restore it, and check for equality. */ public void testSerialization() { DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", new OHLCDataItem[0]); DefaultOHLCDataset 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 = (DefaultOHLCDataset) in.readObject(); in.close(); } catch (Exception e) { System.out.println(e.toString()); } assertEquals(d1, d2); } }