/*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
/*
* Copyright (C) 2006 University of Waikato, Hamilton, New Zealand
*/
package weka.filters.unsupervised.attribute;
import weka.core.Attribute;
import weka.core.Instances;
import weka.core.Range;
import weka.filters.AbstractFilterTest;
import weka.filters.AllFilter;
import weka.filters.Filter;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests PartitionedMultiFilter. Run from the command line with: <p/>
* java weka.filters.unsupervised.attribute.PartitionedMultiFilterTest
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 8034 $
*/
public class PartitionedMultiFilterTest
extends AbstractFilterTest {
public PartitionedMultiFilterTest(String name) {
super(name);
}
/**
* Called by JUnit before each test method. This implementation creates
* the default filter to test and loads a test set of Instances.
*
* @throws Exception if an error occurs reading the example instances.
*/
protected void setUp() throws Exception {
super.setUp();
m_Instances.deleteAttributeType(Attribute.STRING);
m_Instances.deleteAttributeType(Attribute.RELATIONAL);
}
/** Creates a default PartitionedMultiFilter */
public Filter getFilter() {
return new PartitionedMultiFilter();
}
/**
* performs the actual test
*
* @param filters the filters to use
* @param ranges the ranges to use
* @param remove whether to remove unused attributes or not
* @return the processed dataset
* @throws Exception if apllying of filter fails
*/
protected Instances applyFilter(Filter[] filters, Range[] ranges, boolean remove)
throws Exception {
PartitionedMultiFilter filter;
Instances result;
filter = (PartitionedMultiFilter) getFilter();
filter.setFilters(filters);
filter.setRanges(ranges);
filter.setRemoveUnused(remove);
filter.setInputFormat(m_Instances);
result = Filter.useFilter(m_Instances, filter);
return result;
}
/**
* tests two filters with disjoint ranges
*/
public void testDisjoint() {
Instances result = null;
m_Instances.setClassIndex(2);
try {
result = applyFilter(
new Filter[]{new AllFilter(), new AllFilter()},
new Range[]{new Range("1-2"),new Range("4-5")},
false);
}
catch (Exception e) {
fail("Problem applying the filter: " + e);
}
assertEquals(m_Instances.numInstances(), result.numInstances());
assertEquals(m_Instances.numAttributes(), result.numAttributes());
}
/**
* tests two filters with disjoint ranges and removing the unused attributes
*/
public void testDisjointRemoveUnused() {
Instances result = null;
m_Instances.setClassIndex(2);
try {
result = applyFilter(
new Filter[]{new AllFilter(), new AllFilter()},
new Range[]{new Range("1-2"),new Range("5")},
true);
}
catch (Exception e) {
fail("Problem applying the filter: " + e);
}
assertEquals(m_Instances.numInstances(), result.numInstances());
assertEquals(m_Instances.numAttributes() - 1, result.numAttributes());
}
/**
* tests two filters with overlapping ranges
*/
public void testOverlapping() {
Instances result = null;
m_Instances.setClassIndex(2);
try {
result = applyFilter(
new Filter[]{new AllFilter(), new AllFilter()},
new Range[]{new Range("1,2,4"),new Range("2,4")},
false);
}
catch (Exception e) {
fail("Problem applying the filter: " + e);
}
assertEquals(m_Instances.numInstances(), result.numInstances());
assertEquals(m_Instances.numAttributes() + 2, result.numAttributes());
}
/**
* tests two filters with overlapping ranges and removing the unused attributes
*/
public void testOverlappingRemoveUnused() {
Instances result = null;
m_Instances.setClassIndex(2);
try {
result = applyFilter(
new Filter[]{new AllFilter(), new AllFilter()},
new Range[]{new Range("1,2,4"),new Range("2,4")},
true);
}
catch (Exception e) {
fail("Problem applying the filter: " + e);
}
assertEquals(m_Instances.numInstances(), result.numInstances());
assertEquals(m_Instances.numAttributes() + 1, result.numAttributes());
}
public static Test suite() {
return new TestSuite(PartitionedMultiFilterTest.class);
}
public static void main(String[] args){
junit.textui.TestRunner.run(suite());
}
}