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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.]
- *
- * --------------------------------
- * BoxAndWhiskerCalculatorTest.java
- * --------------------------------
- * (C) Copyright 2003-2013, by Object Refinery Limited and Contributors.
- *
- * Original Author: David Gilbert (for Object Refinery Limited);
- * Contributor(s): -;
- *
- * Changes
- * -------
- * 28-Aug-2003 : Version 1 (DG);
- *
- */
- package org.jfree.data.statistics;
- import static org.junit.Assert.assertTrue;
- import static org.junit.Assert.assertEquals;
- import java.util.ArrayList;
- import java.util.List;
- import org.junit.Test;
- /**
- * Tests for the {@link BoxAndWhiskerCalculator} class.
- */
- public class BoxAndWhiskerCalculatorTest {
- /**
- * Some checks for the calculateBoxAndWhiskerStatistics() method.
- */
- @Test
- public void testCalculateBoxAndWhiskerStatistics() {
- // try null list
- boolean pass = false;
- try {
- BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics(null);
- }
- catch (IllegalArgumentException e) {
- pass = true;
- }
- assertTrue(pass);
- // try a list containing a single value
- List values = new ArrayList();
- values.add(new Double(1.1));
- BoxAndWhiskerItem item
- = BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics(values);
- assertEquals(1.1, item.getMean().doubleValue(), EPSILON);
- assertEquals(1.1, item.getMedian().doubleValue(), EPSILON);
- assertEquals(1.1, item.getQ1().doubleValue(), EPSILON);
- assertEquals(1.1, item.getQ3().doubleValue(), EPSILON);
- }
- private static final double EPSILON = 0.000000001;
- /**
- * Tests the Q1 calculation.
- */
- @Test
- public void testCalculateQ1() {
- // try null argument
- boolean pass = false;
- try {
- BoxAndWhiskerCalculator.calculateQ1(null);
- }
- catch (IllegalArgumentException e) {
- pass = true;
- }
- assertTrue(pass);
- List values = new ArrayList();
- double q1 = BoxAndWhiskerCalculator.calculateQ1(values);
- assertTrue(Double.isNaN(q1));
- values.add(new Double(1.0));
- q1 = BoxAndWhiskerCalculator.calculateQ1(values);
- assertEquals(q1, 1.0, EPSILON);
- values.add(new Double(2.0));
- q1 = BoxAndWhiskerCalculator.calculateQ1(values);
- assertEquals(q1, 1.0, EPSILON);
- values.add(new Double(3.0));
- q1 = BoxAndWhiskerCalculator.calculateQ1(values);
- assertEquals(q1, 1.5, EPSILON);
- values.add(new Double(4.0));
- q1 = BoxAndWhiskerCalculator.calculateQ1(values);
- assertEquals(q1, 1.5, EPSILON);
- }
- /**
- * Tests the Q3 calculation.
- */
- @Test
- public void testCalculateQ3() {
- // try null argument
- boolean pass = false;
- try {
- BoxAndWhiskerCalculator.calculateQ3(null);
- }
- catch (IllegalArgumentException e) {
- pass = true;
- }
- assertTrue(pass);
- List values = new ArrayList();
- double q3 = BoxAndWhiskerCalculator.calculateQ3(values);
- assertTrue(Double.isNaN(q3));
- values.add(new Double(1.0));
- q3 = BoxAndWhiskerCalculator.calculateQ3(values);
- assertEquals(q3, 1.0, EPSILON);
- values.add(new Double(2.0));
- q3 = BoxAndWhiskerCalculator.calculateQ3(values);
- assertEquals(q3, 2.0, EPSILON);
- values.add(new Double(3.0));
- q3 = BoxAndWhiskerCalculator.calculateQ3(values);
- assertEquals(q3, 2.5, EPSILON);
- values.add(new Double(4.0));
- q3 = BoxAndWhiskerCalculator.calculateQ3(values);
- assertEquals(q3, 3.5, EPSILON);
- }
- /**
- * The test case included in bug report 1593149.
- */
- @Test
- public void test1593149() {
- ArrayList theList = new ArrayList(5);
- theList.add(0, new Double(1.0));
- theList.add(1, new Double(2.0));
- theList.add(2, new Double(Double.NaN));
- theList.add(3, new Double(3.0));
- theList.add(4, new Double(4.0));
- BoxAndWhiskerItem theItem =
- BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics(theList);
- assertEquals(1.0, theItem.getMinRegularValue().doubleValue(), EPSILON);
- assertEquals(4.0, theItem.getMaxRegularValue().doubleValue(), EPSILON);
- }
- }
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