Java tutorial
/* =========================================================== * 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.] * * ------------------------------ * CategoryToPieDatasetTests.java * ------------------------------ * (C) Copyright 2006-2013, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * Changes * ------- * 26-Jul-2006 : Version 1 (DG); * 01-Aug-2006 : Added testGetIndex() method (DG); * */ package org.jfree.data.category; import org.jfree.chart.TestUtilities; import org.jfree.data.general.DefaultPieDataset; import org.jfree.util.TableOrder; import org.junit.Test; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import static org.junit.Assert.assertNull; import static org.junit.Assert.fail; /** * Tests for the {@link CategoryToPieDataset} class. */ public class CategoryToPieDatasetTest { /** * Some tests for the constructor. */ @Test public void testConstructor() { // try a null source CategoryToPieDataset p1 = new CategoryToPieDataset(null, TableOrder.BY_COLUMN, 0); assertNull(p1.getUnderlyingDataset()); assertEquals(p1.getItemCount(), 0); assertTrue(p1.getKeys().isEmpty()); assertNull(p1.getValue("R1")); } /** * Some checks for the getValue() method. */ @Test public void testGetValue() { DefaultCategoryDataset underlying = new DefaultCategoryDataset(); underlying.addValue(1.1, "R1", "C1"); underlying.addValue(2.2, "R1", "C2"); CategoryToPieDataset d1 = new CategoryToPieDataset(underlying, TableOrder.BY_ROW, 0); assertEquals(d1.getValue("C1"), new Double(1.1)); assertEquals(d1.getValue("C2"), new Double(2.2)); // check negative index throws exception try { /* Number n = */ d1.getValue(-1); fail("Expected IndexOutOfBoundsException."); } catch (IndexOutOfBoundsException e) { // this is expected } // check index == getItemCount() throws exception try { /* Number n = */ d1.getValue(d1.getItemCount()); fail("Expected IndexOutOfBoundsException."); } catch (IndexOutOfBoundsException e) { // this is expected } // test null source CategoryToPieDataset p1 = new CategoryToPieDataset(null, TableOrder.BY_COLUMN, 0); try { /* Number n = */ p1.getValue(0); fail("Expected IndexOutOfBoundsException."); } catch (IndexOutOfBoundsException e) { // this is expected } } /** * Some checks for the getKey(int) method. */ @Test public void testGetKey() { DefaultCategoryDataset underlying = new DefaultCategoryDataset(); underlying.addValue(1.1, "R1", "C1"); underlying.addValue(2.2, "R1", "C2"); CategoryToPieDataset d1 = new CategoryToPieDataset(underlying, TableOrder.BY_ROW, 0); assertEquals(d1.getKey(0), "C1"); assertEquals(d1.getKey(1), "C2"); // check negative index throws exception try { /* Number n = */ d1.getKey(-1); fail("Expected IndexOutOfBoundsException."); } catch (IndexOutOfBoundsException e) { // this is expected } // check index == getItemCount() throws exception try { /* Number n = */ d1.getKey(d1.getItemCount()); fail("Expected IndexOutOfBoundsException."); } catch (IndexOutOfBoundsException e) { // this is expected } // test null source CategoryToPieDataset p1 = new CategoryToPieDataset(null, TableOrder.BY_COLUMN, 0); try { /* Number n = */ p1.getKey(0); fail("Expected IndexOutOfBoundsException."); } catch (IndexOutOfBoundsException e) { // this is expected } } /** * Some checks for the getIndex() method. */ @Test public void testGetIndex() { DefaultCategoryDataset underlying = new DefaultCategoryDataset(); underlying.addValue(1.1, "R1", "C1"); underlying.addValue(2.2, "R1", "C2"); CategoryToPieDataset d1 = new CategoryToPieDataset(underlying, TableOrder.BY_ROW, 0); assertEquals(0, d1.getIndex("C1")); assertEquals(1, d1.getIndex("C2")); assertEquals(-1, d1.getIndex("XX")); // try null boolean pass = false; try { d1.getIndex(null); } catch (IllegalArgumentException e) { pass = true; } assertTrue(pass); } /** * For datasets, the equals() method just checks keys and values. */ @Test public void testEquals() { DefaultCategoryDataset underlying = new DefaultCategoryDataset(); underlying.addValue(1.1, "R1", "C1"); underlying.addValue(2.2, "R1", "C2"); CategoryToPieDataset d1 = new CategoryToPieDataset(underlying, TableOrder.BY_COLUMN, 1); DefaultPieDataset d2 = new DefaultPieDataset(); d2.setValue("R1", 2.2); assertTrue(d1.equals(d2)); } /** * Serialize an instance, restore it, and check for equality. */ @Test public void testSerialization() { DefaultCategoryDataset underlying = new DefaultCategoryDataset(); underlying.addValue(1.1, "R1", "C1"); underlying.addValue(2.2, "R1", "C2"); CategoryToPieDataset d1 = new CategoryToPieDataset(underlying, TableOrder.BY_COLUMN, 1); CategoryToPieDataset d2 = (CategoryToPieDataset) TestUtilities.serialised(d1); assertEquals(d1, d2); // regular equality for the datasets doesn't check the fields, just // the data values...so let's check some more things... assertEquals(d1.getUnderlyingDataset(), d2.getUnderlyingDataset()); assertEquals(d1.getExtractType(), d2.getExtractType()); assertEquals(d1.getExtractIndex(), d2.getExtractIndex()); } }