source: trunk/EventBenchCoreTest/src/de/ugoe/cs/eventbench/models/FirstOrderMarkovModelTest.java

package de.ugoe.cs.eventbench.models;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;
import org.junit.*;

import de.ugoe.cs.eventbench.data.Event;
import de.ugoe.cs.eventbench.models.FirstOrderMarkovModel.MarkovEdge;
import static org.junit.Assert.*;

/**
 * The class <code>FirstOrderMarkovModelTest</code> contains tests for the class
 * <code>{@link FirstOrderMarkovModel}</code>.
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class FirstOrderMarkovModelTest {

        Collection<List<? extends Event<?>>> sequences;
        
        @Test
        public void testFirstOrderMarkovModel_1() throws Exception {
                Random r = new Random();

                FirstOrderMarkovModel result = new FirstOrderMarkovModel(r);

                assertNotNull(result);
                assertEquals(r, result.r);
                assertEquals(2, result.trieOrder);
        }

        @Test(expected = java.security.InvalidParameterException.class)
        public void testFirstOrderMarkovModel_2() throws Exception {
                new FirstOrderMarkovModel(null);
        }
        
        @Test
        public void testCalcEntropy() throws Exception {
                Random r = new Random();
                FirstOrderMarkovModel fixture = new FirstOrderMarkovModel(r);
                fixture.train(sequences);
                
                double result = fixture.calcEntropy();
                
                assertEquals(0.7392d, result, 0.0001);
        }
        
        @Test
        public void testMarkovEdgeMarkovEdge_1() throws Exception {
                double weight = 0.2d;
                
                MarkovEdge result = new MarkovEdge(weight);
                
                assertNotNull(result);
                assertEquals(weight, result.weight, 0.0001);
        }
        
        @Test
        public void testMarkovEdgeToString_1() throws Exception {
                double weight = 0.2d;
                MarkovEdge fixture = new MarkovEdge(weight);
                
                String result = fixture.toString();
                
                assertEquals(Double.toString(0.2d), result);
        }
        
        @Before
        public void setUp() throws Exception {
                List<Event<?>> sequence = new ArrayList<Event<?>>();
                sequence.add(new Event<String>("a"));
                sequence.add(new Event<String>("b"));
                sequence.add(new Event<String>("r"));
                sequence.add(new Event<String>("a"));
                sequence.add(new Event<String>("c"));
                sequence.add(new Event<String>("a"));
                sequence.add(new Event<String>("d"));
                sequence.add(new Event<String>("a"));
                sequence.add(new Event<String>("b"));
                sequence.add(new Event<String>("r"));
                sequence.add(new Event<String>("a"));

                sequences = new ArrayList<List<? extends Event<?>>>();
                sequences.add(sequence);
        }

        public static void main(String[] args) {
                new org.junit.runner.JUnitCore().run(FirstOrderMarkovModelTest.class);
        }
}