source: trunk/CrossPare/test/de/ugoe/cs/cpdp/preprocessing/AttributeRemoverTest.java

package de.ugoe.cs.cpdp.preprocessing;

import static org.junit.Assert.*;

import java.util.ArrayList;
import java.util.LinkedList;

import org.apache.commons.collections4.list.SetUniqueList;
import org.junit.Test;

import de.ugoe.cs.cpdp.dataprocessing.AttributeRemoval;

import weka.core.Attribute;
import weka.core.DenseInstance;
import weka.core.Instances;

public class AttributeRemoverTest {

        @Test
        public void testApply_1() {
                ArrayList<Attribute> attributes = new ArrayList<Attribute>();
                attributes.add(new Attribute("attr1"));
                attributes.add(new Attribute("class"));
                attributes.add(new Attribute("attr2"));
                Instances instances = new Instances("test", attributes, 0);
                instances.setClassIndex(1);
                
                double[] value1 = new double[]{1.5, 0.0,  3.0};
                double[] value2 = new double[]{1.4, 1.0,  6.0};
                double[] value3 = new double[]{1.6, 0.0, 15.0};
                
                instances.add(new DenseInstance(1.0, value1));
                instances.add(new DenseInstance(1.0, value2));
                instances.add(new DenseInstance(1.0, value3));
                
                AttributeRemoval processor = new AttributeRemoval();
                processor.setParameter("attr2");
                processor.apply(instances, SetUniqueList.setUniqueList(new LinkedList<Instances>()) );
                
                double[] expected1 = new double[]{1.5, 0.0};
                double[] expected2 = new double[]{1.4, 1.0};
                double[] expected3 = new double[]{1.6, 0.0};
                                
                assertEquals(2, instances.numAttributes());
                assertArrayEquals(expected1, instances.instance(0).toDoubleArray(), 0.0001);
                assertArrayEquals(expected2, instances.instance(1).toDoubleArray(), 0.0001);
                assertArrayEquals(expected3, instances.instance(2).toDoubleArray(), 0.0001);
        }
        
        @Test
        public void testApply_2() {
                ArrayList<Attribute> attributes = new ArrayList<Attribute>();
                attributes.add(new Attribute("attr1"));
                attributes.add(new Attribute("class"));
                attributes.add(new Attribute("attr2"));
                Instances instances = new Instances("test", attributes, 0);
                instances.setClassIndex(1);
                
                double[] value1 = new double[]{1.5, 0.0,  3.0};
                double[] value2 = new double[]{1.4, 1.0,  6.0};
                double[] value3 = new double[]{1.6, 0.0, 15.0};
                
                instances.add(new DenseInstance(1.0, value1));
                instances.add(new DenseInstance(1.0, value2));
                instances.add(new DenseInstance(1.0, value3));
                
                AttributeRemoval processor = new AttributeRemoval();
                processor.setParameter("attr2 attr1");
                processor.apply(instances, SetUniqueList.setUniqueList(new LinkedList<Instances>()) );
                
                double[] expected1 = new double[]{0.0};
                double[] expected2 = new double[]{1.0};
                double[] expected3 = new double[]{0.0};
                                
                assertEquals(1, instances.numAttributes());
                assertArrayEquals(expected1, instances.instance(0).toDoubleArray(), 0.0001);
                assertArrayEquals(expected2, instances.instance(1).toDoubleArray(), 0.0001);
                assertArrayEquals(expected3, instances.instance(2).toDoubleArray(), 0.0001);
        }

}