/*
* 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) 2002 University of Waikato
*/
package weka.filters.unsupervised.instance;
import weka.core.Instances;
import weka.filters.AbstractFilterTest;
import weka.filters.Filter;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests RemoveWithValues. Run from the command line with:<p>
* java weka.filters.unsupervised.instance.RemoveWithValuesTest
*
* @author <a href="mailto:len@reeltwo.com">Len Trigg</a>
* @version $Revision: 1.6 $
*/
public class RemoveWithValuesTest extends AbstractFilterTest {
public RemoveWithValuesTest(String name) { super(name); }
/** Creates a default RemoveWithValues */
public Filter getFilter() {
RemoveWithValues f = new RemoveWithValues();
f.setAttributeIndex("3");
f.setInvertSelection(true);
return f;
}
public void testString() {
Instances icopy = new Instances(m_Instances);
try {
((RemoveWithValues)m_Filter).setAttributeIndex("1");
m_Filter.setInputFormat(icopy);
fail("Should have thrown an exception selecting on a STRING attribute!");
} catch (Exception ex) {
// OK
}
}
public void testNominal() {
((RemoveWithValues)m_Filter).setAttributeIndex("2");
Instances result = useFilter();
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertEquals("Default nominal selection matches all values",
m_Instances.numInstances(), result.numInstances());
try {
((RemoveWithValues)m_Filter).setNominalIndices("1-2");
} catch (Exception ex) {
fail("Shouldn't ever get here unless Range chamges incompatibly");
}
result = useFilter();
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertTrue(m_Instances.numInstances() > result.numInstances());
try {
((RemoveWithValues)m_Filter).setNominalIndices("3-last");
} catch (Exception ex) {
fail("Shouldn't ever get here unless Range chamges incompatibly");
}
Instances result2 = useFilter();
assertEquals(m_Instances.numAttributes(), result2.numAttributes());
assertTrue(m_Instances.numInstances() > result2.numInstances());
assertEquals(m_Instances.numInstances(), result.numInstances() + result2.numInstances());
((RemoveWithValues)m_Filter).setInvertSelection(false);
result = useFilter();
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertEquals(m_Instances.numInstances(), result.numInstances() + result2.numInstances());
}
public void testNumeric() {
((RemoveWithValues)m_Filter).setAttributeIndex("3");
Instances result = useFilter();
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertEquals("Default split point matches values less than 0",
0, result.numInstances());
((RemoveWithValues)m_Filter).setSplitPoint(3);
result = useFilter();
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertTrue(m_Instances.numInstances() > result.numInstances());
// Test inversion is working.
((RemoveWithValues)m_Filter).setInvertSelection(false);
Instances result2 = useFilter();
assertEquals(m_Instances.numAttributes(), result2.numAttributes());
assertTrue(m_Instances.numInstances() > result2.numInstances());
assertEquals(m_Instances.numInstances(), result.numInstances() + result2.numInstances());
}
public void testMatchMissingValues() {
((RemoveWithValues)m_Filter).setAttributeIndex("5");
((RemoveWithValues)m_Filter).setInvertSelection(false);
((RemoveWithValues)m_Filter).setMatchMissingValues(false);
Instances result = useFilter();
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertTrue(result.numInstances() > 0);
for (int i = 0; i < result.numInstances(); i++) {
assertTrue("Should select only instances with missing values",
result.instance(i).isMissing(4));
}
}
/**
* filter cannot be used in conjunction with the FilteredClassifier, since
* an instance used in distributionForInstance/classifyInstance might get
* deleted.
*/
public void testFilteredClassifier() {
// nothing
}
public static Test suite() {
return new TestSuite(RemoveWithValuesTest.class);
}
public static void main(String[] args){
junit.textui.TestRunner.run(suite());
}
}