/*
* 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) 2009 University of Waikato, Hamilton, New Zealand
*/
package weka.filters.unsupervised.attribute;
import weka.core.Attribute;
import weka.core.Instances;
import weka.core.SelectedTag;
import weka.filters.AbstractFilterTest;
import weka.filters.Filter;
import java.util.HashSet;
import junit.framework.Test;
import junit.framework.TestSuite;
import junit.textui.TestRunner;
/**
* Tests SortLabels. Run from the command line with: <p/>
* java weka.filters.unsupervised.attribute.SortLabelsTest
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 5245 $
*/
public class SortLabelsTest
extends AbstractFilterTest {
/**
* Initializes the test with the given name.
*
* @param name the name of the test
*/
public SortLabelsTest(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 SortLabels filter.
*
* @return the filter
*/
public Filter getFilter() {
return new SortLabels();
}
/**
* Creates a specialized SortLabels.
*
* @param sort the sort type
* @param range the sort range
* @return the configured filter
*/
public Filter getFilter(int sort, String range) {
SortLabels result = new SortLabels();
result.setSortType(new SelectedTag(SortLabels.SORT_CASESENSITIVE, SortLabels.TAGS_SORTTYPE));
result.setAttributeIndices(range);
return result;
}
/**
* performs the actual test.
*
* @return the generated instances
*/
protected Instances performTest() {
Instances icopy = new Instances(m_Instances);
Instances result = null;
try {
m_Filter.setInputFormat(icopy);
}
catch (Exception ex) {
ex.printStackTrace();
fail("Exception thrown on setInputFormat(): \n" + ex.getMessage());
}
try {
result = Filter.useFilter(icopy, m_Filter);
assertNotNull(result);
}
catch (Exception ex) {
ex.printStackTrace();
fail("Exception thrown on useFilter(): \n" + ex.getMessage());
}
assertEquals("Number of attributes", icopy.numAttributes(), result.numAttributes());
assertEquals("Number of instances", icopy.numInstances(), m_Instances.numInstances());
for (int i = 0; i < result.numAttributes(); i++) {
// test number of values
assertEquals("Number of values differ for attribute #" + (i+1), icopy.attribute(i).numValues(), result.attribute(i).numValues());
// test values
HashSet<String> valuesOriginal = new HashSet<String>();
HashSet<String> valuesResult = new HashSet<String>();
for (int n = 0; n < icopy.attribute(i).numValues(); n++) {
valuesOriginal.add(icopy.attribute(i).value(n));
valuesResult.add(result.attribute(i).value(n));
}
assertEquals("Values differ for attribute #" + (i+1), valuesOriginal, valuesResult);
}
return result;
}
/**
* Tests the case-sensitive sorting on all attributes.
*/
public void testCaseSensitive() {
m_Filter = getFilter(SortLabels.SORT_CASESENSITIVE, "first-last");
testBuffered();
Instances result = performTest();
String[] sorted = new String[]{"b", "g", "r"};
for (int i = 0; i < sorted.length; i++)
assertEquals("Values differ for index #" + (i+1), result.attribute(0).value(i), sorted[i]);
}
/**
* Tests the case-insensitive sorting on all attributes.
*/
public void testCaseInsensitive() {
m_Filter = getFilter(SortLabels.SORT_CASEINSENSITIVE, "first-last");
testBuffered();
Instances result = performTest();
String[] sorted = new String[]{"b", "g", "r"};
for (int i = 0; i < sorted.length; i++)
assertEquals("Values differ for index #" + (i+1), sorted[i], result.attribute(0).value(i));
}
/**
* Tests that ordering didn't change.
*/
public void testUnchangedOrder() {
m_Filter = getFilter(SortLabels.SORT_CASESENSITIVE, "first-last");
testBuffered();
Instances result = performTest();
for (int i = 0; i < m_Instances.attribute(2).numValues(); i++)
assertEquals("Values differ for index #" + (i+1), m_Instances.attribute(2).value(i), result.attribute(2).value(i));
}
/**
* Returns a test.
*
* @return the test
*/
public static Test suite() {
return new TestSuite(SortLabelsTest.class);
}
/**
* Runs the test from commandline.
*
* @param args ignored
*/
public static void main(String[] args){
TestRunner.run(suite());
}
}