/*
* 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) 2010 University of Waikato, Hamilton, NZ
*/
package weka.core;
import java.util.ArrayList;
import java.util.Arrays;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import junit.textui.TestRunner;
import weka.core.converters.ConverterUtils.DataSource;
/**
* Tests Instances. Run from the command line with:<p/>
* java weka.core.InstancesTest
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 6317 $
*/
public class InstancesTest
extends TestCase {
/** the test instances to work with. */
protected Instances m_Instances;
/**
* Constructs the <code>InstancesTest</code>.
*
* @param name the name of the test
*/
public InstancesTest(String name) {
super(name);
}
/**
* Called by JUnit before each test method.
*
* @throws Exception if an error occurs
*/
protected void setUp() throws Exception {
super.setUp();
m_Instances = DataSource.read(ClassLoader.getSystemResourceAsStream("weka/core/data/InstancesTest.arff"));
}
/**
* Called by JUnit after each test method.
*
* @throws Exception if an error occurs
*/
protected void tearDown() throws Exception {
m_Instances = null;
super.tearDown();
}
/**
* Returns the test suite.
*
* @return the test suite
*/
public static Test suite() {
return new TestSuite(InstancesTest.class);
}
/**
* Tests the creation of a dataset (unique attribute names).
*
* @see Instances#Instances(String, ArrayList, int)
*/
public void testCreationUnique() {
Instances data;
ArrayList<Attribute> atts;
String relName;
relName = "testCreationUnique";
atts = new ArrayList<Attribute>();
atts.add(new Attribute("att-numeric_1"));
atts.add(new Attribute("att-numeric_2"));
atts.add(new Attribute("att-data_1", "yyyy-MM-dd HH:mm"));
atts.add(new Attribute("att-nominal_1", new ArrayList<String>(Arrays.asList(new String[]{"1", "2", "3"}))));
atts.add(new Attribute("att-nominal_2", new ArrayList<String>(Arrays.asList(new String[]{"yes", "no"}))));
atts.add(new Attribute("att-string_1", (ArrayList<String>) null));
data = new Instances(relName, atts, 0);
assertEquals("relation name differs", relName, data.relationName());
assertEquals("# of attributes differ", atts.size(), data.numAttributes());
}
/**
* Tests the creation of a dataset (ambiguous attribute names).
*
* @see Instances#Instances(String, ArrayList, int)
*/
public void testCreationAmbiguous() {
Instances data;
ArrayList<Attribute> atts;
String relName;
relName = "testCreationAmbiguous";
atts = new ArrayList<Attribute>();
atts.add(new Attribute("att-numeric_1"));
atts.add(new Attribute("att-numeric_1"));
atts.add(new Attribute("att-data_1", "yyyy-MM-dd HH:mm"));
atts.add(new Attribute("att-nominal_1", new ArrayList<String>(Arrays.asList(new String[]{"1", "2", "3"}))));
atts.add(new Attribute("att-nominal_1", new ArrayList<String>(Arrays.asList(new String[]{"yes", "no"}))));
atts.add(new Attribute("att-string_1", (ArrayList<String>) null));
try {
data = new Instances(relName, atts, 0);
}
catch (IllegalArgumentException e) {
data = null;
}
assertNull("dataset created with ambiguous attribute names", data);
}
/**
* Tests the copying of the header of a dataset.
*
* @see Instances#Instances(Instances, int)
*/
public void testHeaderCopy() {
Instances data;
data = new Instances(m_Instances, 0);
assertEquals("# of attributes differ", m_Instances.numAttributes(), data.numAttributes());
assertEquals("class index differs", m_Instances.classIndex(), data.classIndex());
assertEquals("Unexpected instances", 0, data.numInstances());
m_Instances.setClassIndex(m_Instances.numAttributes() - 1);
data = new Instances(m_Instances, 0);
assertEquals("class index differs", m_Instances.classIndex(), data.classIndex());
}
/**
* Tests the full copy of a dataset.
*
* @see Instances#Instances(Instances)
*/
public void testFullCopy() {
Instances data;
data = new Instances(m_Instances);
assertEquals("# of attributes differ", m_Instances.numAttributes(), data.numAttributes());
assertEquals("class index differs", m_Instances.classIndex(), data.classIndex());
assertEquals("# of instances differ", m_Instances.numInstances(), data.numInstances());
m_Instances.setClassIndex(m_Instances.numAttributes() - 1);
data = new Instances(m_Instances);
assertEquals("class index differs", m_Instances.classIndex(), data.classIndex());
}
/**
* Tests the partial copy of a dataset.
*
* @see Instances#Instances(Instances, int, int)
*/
public void testPartialCopy() {
Instances data;
data = new Instances(m_Instances, 0, m_Instances.numInstances());
assertEquals("# of instances differ", m_Instances.numInstances(), data.numInstances());
data = new Instances(m_Instances, 5, 10);
assertEquals("# of instances differ", 10, data.numInstances());
}
/**
* Executes the test from command-line.
*
* @param args ignored
*/
public static void main(String[] args){
TestRunner.run(suite());
}
}