/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Copyright (C) 2005 University of Waikato, Hamilton, New Zealand
*/
package weka.filters;
import weka.core.Instances;
import weka.filters.unsupervised.attribute.Add;
import weka.filters.unsupervised.attribute.AddExpression;
import weka.filters.unsupervised.attribute.Center;
import weka.filters.unsupervised.attribute.ReplaceMissingValues;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests MultiFilter. Run from the command line with: <p/>
* java weka.filters.MultiFilterTest
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 1.2 $
*/
public class MultiFilterTest extends AbstractFilterTest {
public MultiFilterTest(String name) {
super(name);
}
/** Creates a default MultiFilter */
public Filter getFilter() {
return new MultiFilter();
}
/** Creates a configured MultiFilter */
public Filter getConfiguredFilter() {
MultiFilter result = new MultiFilter();
Filter[] filters = new Filter[2];
filters[0] = new Add();
((Add) filters[0]).setAttributeIndex("last");
filters[1] = new AddExpression();
((AddExpression) filters[1]).setExpression("a3+a6");
result.setFilters(filters);
return result;
}
/** Creates a configured MultiFilter (variant) */
public Filter getConfiguredFilterVariant() {
MultiFilter result = new MultiFilter();
Filter[] filters = new Filter[2];
filters[0] = new ReplaceMissingValues();
filters[1] = new Center();
result.setFilters(filters);
return result;
}
public void testDefault() {
Instances result = useFilter();
// Number of attributes and instances shouldn't change
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertEquals(m_Instances.numInstances(), result.numInstances());
}
/**
* tests Add + AddExpression filter
*/
public void testConfigured() {
m_Filter = getConfiguredFilter();
Instances result = useFilter();
// Number of attributes should be 2 more
assertEquals(m_Instances.numAttributes() + 2, result.numAttributes());
// Number of instances shouldn't change
assertEquals(m_Instances.numInstances(), result.numInstances());
}
/**
* tests ReplaceMissingValues + Center filter
*/
public void testConfiguredVariant() {
m_Filter = getConfiguredFilterVariant();
Instances result = useFilter();
// Number of atytributes + instances shouldn't change
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertEquals(m_Instances.numInstances(), result.numInstances());
}
public static Test suite() {
return new TestSuite(MultiFilterTest.class);
}
public static void main(String[] args){
junit.textui.TestRunner.run(suite());
}
}