net.sourceforge.openforecast.tests

Class TripleExponentialSmoothingTest

java.lang.Object

junit.framework.Assert

junit.framework.TestCase

net.sourceforge.openforecast.tests.OpenForecastTestCase

net.sourceforge.openforecast.tests.TripleExponentialSmoothingTest

All Implemented Interfaces:

junit.framework.Test

public class TripleExponentialSmoothingTest
extends OpenForecastTestCase

Tests the implementation of the Triple Exponential Smoothing forecasting model.

Since:

0.4

Constructor Summary

Constructors

Constructor and Description
TripleExponentialSmoothingTest(java.lang.String name) Constructor required by the JUnit framework.

Method Summary

Modifier and Type	Method and Description
void	testAirConditioning2YearExample() An example taken from Wayne Winston's book.
void	testAirConditioning3YearExample() An example taken from Wayne Winston's book.
void	testConstantTripleExponentialSmoothing() A simple test of triple exponential smoothing where the observed data is constant.

Methods inherited from class junit.framework.TestCase

assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertFalse, assertFalse, assertNotNull, assertNotNull, assertNotSame, assertNotSame, assertNull, assertNull, assertSame, assertSame, assertTrue, assertTrue, countTestCases, fail, fail, failNotEquals, failNotSame, failSame, format, getName, run, run, runBare, setName, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TripleExponentialSmoothingTest

public TripleExponentialSmoothingTest(java.lang.String name)

Constructor required by the JUnit framework.

Method Detail

testConstantTripleExponentialSmoothing

public void testConstantTripleExponentialSmoothing()

A simple test of triple exponential smoothing where the observed data is constant. This should result in the same constant forecast for any value of the smoothing constants.

testAirConditioning2YearExample

public void testAirConditioning2YearExample()

An example taken from Wayne Winston's book. Sales of air conditioners. This example uses only the first two years of data, then tests the extrapolation out to a third year.

testAirConditioning3YearExample

public void testAirConditioning3YearExample()

An example taken from Wayne Winston's book. Sales of air conditioners. This example uses three years of data, then tests the "forecasts" - using triple exponential smoothing - for the third year. It therefore tests the updating of the triple exponential smoothing terms as additional data becomes available.