1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.math.genetics;
18  
19  import static org.junit.Assert.*;
20  
21  import java.util.ArrayList;
22  
23  import org.junit.Test;
24  
25  public class ListPopulationTest {
26  
27      @Test
28      public void testGetFittestChromosome() {
29          Chromosome c1 = new Chromosome() {
30              public double fitness() {                
31                  return 0;
32              }
33          };
34          Chromosome c2 = new Chromosome() {
35              public double fitness() {                
36                  return 10;
37              }
38          };
39          Chromosome c3 = new Chromosome() {
40              public double fitness() {                
41                  return 15;
42              }
43          };
44          
45          ArrayList<Chromosome> chromosomes = new ArrayList<Chromosome> ();
46          chromosomes.add(c1);
47          chromosomes.add(c2);
48          chromosomes.add(c3);
49          
50          ListPopulation population = new ListPopulation(chromosomes,10) {
51  
52              public Population nextGeneration() {
53                  // not important
54                  return null;
55              }
56          };
57          
58          assertEquals(c3, population.getFittestChromosome());
59      }
60  
61  }