/* ===========================================================
* 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.]
*
* -----------------------
* MovingAverageTests.java
* -----------------------
* (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 14-Aug-2003 : Version 1 (DG);
* 04-Oct-2004 : Eliminated NumberUtils usage (DG);
*
*/
package org.jfree.data.time;
import org.jfree.chart.date.MonthConstants;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* Tests for the {@link MovingAverage} class.
*/
public class MovingAverageTest {
private static final double EPSILON = 0.0000000001;
/**
* A test for the values calculated from a time series.
*/
@Test
public void test1() {
TimeSeries source = createDailyTimeSeries1();
TimeSeries maverage = MovingAverage.createMovingAverage(
source, "Moving Average", 3, 3
);
// the moving average series has 7 items, the first three
// days (11, 12, 13 August are skipped)
assertEquals(7, maverage.getItemCount());
double value = maverage.getValue(0).doubleValue();
assertEquals(14.1, value, EPSILON);
value = maverage.getValue(1).doubleValue();
assertEquals(13.4, value, EPSILON);
value = maverage.getValue(2).doubleValue();
assertEquals(14.433333333333, value, EPSILON);
value = maverage.getValue(3).doubleValue();
assertEquals(14.933333333333, value, EPSILON);
value = maverage.getValue(4).doubleValue();
assertEquals(19.8, value, EPSILON);
value = maverage.getValue(5).doubleValue();
assertEquals(15.25, value, EPSILON);
value = maverage.getValue(6).doubleValue();
assertEquals(12.5, value, EPSILON);
}
/**
* Creates a sample series.
*
* @return A sample series.
*/
private TimeSeries createDailyTimeSeries1() {
TimeSeries series = new TimeSeries("Series 1");
series.add(new Day(11, MonthConstants.AUGUST, 2003), 11.2);
series.add(new Day(13, MonthConstants.AUGUST, 2003), 13.8);
series.add(new Day(17, MonthConstants.AUGUST, 2003), 14.1);
series.add(new Day(18, MonthConstants.AUGUST, 2003), 12.7);
series.add(new Day(19, MonthConstants.AUGUST, 2003), 16.5);
series.add(new Day(20, MonthConstants.AUGUST, 2003), 15.6);
series.add(new Day(25, MonthConstants.AUGUST, 2003), 19.8);
series.add(new Day(27, MonthConstants.AUGUST, 2003), 10.7);
series.add(new Day(28, MonthConstants.AUGUST, 2003), 14.3);
return series;
}
}