001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.commons.math.genetics;
018    
019    import static org.junit.Assert.*;
020    
021    import java.util.ArrayList;
022    
023    import org.junit.Test;
024    
025    public class ListPopulationTest {
026    
027        @Test
028        public void testGetFittestChromosome() {
029            Chromosome c1 = new Chromosome() {
030                public double fitness() {                
031                    return 0;
032                }
033            };
034            Chromosome c2 = new Chromosome() {
035                public double fitness() {                
036                    return 10;
037                }
038            };
039            Chromosome c3 = new Chromosome() {
040                public double fitness() {                
041                    return 15;
042                }
043            };
044            
045            ArrayList<Chromosome> chromosomes = new ArrayList<Chromosome> ();
046            chromosomes.add(c1);
047            chromosomes.add(c2);
048            chromosomes.add(c3);
049            
050            ListPopulation population = new ListPopulation(chromosomes,10) {
051    
052                public Population nextGeneration() {
053                    // not important
054                    return null;
055                }
056            };
057            
058            assertEquals(c3, population.getFittestChromosome());
059        }
060    
061    }