/*
* JGAAP -- a graphical program for stylometric authorship attribution
* Copyright (C) 2009,2011 by Patrick Juola
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
*
*/
package com.jgaap.distances;
import static org.junit.Assert.*;
import java.util.Vector;
import org.junit.Test;
import com.jgaap.util.Event;
import com.jgaap.util.EventMap;
import com.jgaap.util.EventSet;
/**
* @author Patrick Juola
*
*/
public class CosineDistanceTest {
/**
* Test method for
* {@link com.jgaap.distances.CosineDistance#distance(com.jgaap.util.EventSet, com.jgaap.util.EventSet)}
* .
*/
@Test
public void testDistance() {
EventSet es1 = new EventSet();
EventSet es2 = new EventSet();
Vector<Event> test1 = new Vector<Event>();
test1.add(new Event("The", null));
test1.add(new Event("quick", null));
test1.add(new Event("brown", null));
test1.add(new Event("fox", null));
test1.add(new Event("jumps", null));
test1.add(new Event("over", null));
test1.add(new Event("the", null));
test1.add(new Event("lazy", null));
test1.add(new Event("dog", null));
test1.add(new Event(".", null));
es1.addEvents(test1);
es2.addEvents(test1);
double result = new CosineDistance().distance(new EventMap(es1), new EventMap(es2));
assertTrue(DistanceTestHelper.inRange(result, 0.0, 0.0000000001));
Vector<Event> test2 = new Vector<Event>();
test2.add(new Event("3", null));
test2.add(new Event("..", null));
test2.add(new Event("1", null));
test2.add(new Event("4", null));
test2.add(new Event("11", null));
test2.add(new Event("5", null));
test2.add(new Event("2", null));
test2.add(new Event("6", null));
test2.add(new Event("55", null));
test2.add(new Event("33", null));
es2 = new EventSet();
es2.addEvents(test2);
result = new CosineDistance().distance(new EventMap(es1), new EventMap(es2));
assertTrue(DistanceTestHelper.inRange(result, 1.0, 0.0000000001));
es1 = new EventSet();
es2 = new EventSet();
test1=new Vector<Event>();
test1.add( new Event("alpha", null));
test2=new Vector<Event>();
test2.add( new Event("alpha", null));
test2.add( new Event("alpha", null));
es1.addEvents(test1);
es2.addEvents(test2);
result = new CosineDistance().distance(new EventMap(es1), new EventMap(es2));
assertTrue(DistanceTestHelper.inRange(result, 0.0, 0.0000000001));
es1=new EventSet();
es2 =new EventSet();
test1=new Vector<Event>();
test1.add( new Event("alpha", null));
test2=new Vector<Event>();
test2.add( new Event("alpha", null));
test2.add( new Event("beta", null));
es1.addEvents(test1);
es2.addEvents(test2);
result = new CosineDistance().distance(new EventMap(es1), new EventMap(es2));
assertTrue(DistanceTestHelper.inRange(result, 0.29289321881345, 0.0000000001));
}
}