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  import java.util.List;
23  
24  import org.junit.Test;
25  
26  public class ChromosomeTest {
27  
28      @Test
29      public void testCompareTo() {
30          Chromosome c1 = new Chromosome() {
31              public double fitness() {                
32                  return 0;
33              }
34          };
35          Chromosome c2 = new Chromosome() {
36              public double fitness() {                
37                  return 10;
38              }
39          };
40          Chromosome c3 = new Chromosome() {
41              public double fitness() {                
42                  return 10;
43              }
44          };
45          
46          assertTrue(c1.compareTo(c2) < 0);
47          assertTrue(c2.compareTo(c1) > 0);
48          assertEquals(0,c3.compareTo(c2));
49          assertEquals(0,c2.compareTo(c3));
50      }
51      
52      private abstract static class DummyChromosome extends Chromosome {
53          private final int repr;
54  
55          public DummyChromosome(final int repr) {
56              this.repr = repr;
57          }
58          @Override
59          protected boolean isSame(Chromosome another) {
60              return ((DummyChromosome) another).repr == repr;
61          }
62      }
63      
64      @Test
65      public void testFindSameChromosome() {
66          Chromosome c1 = new DummyChromosome(1) {
67              public double fitness() {
68                  return 1;
69              }
70          };
71          Chromosome c2 = new DummyChromosome(2) {
72              public double fitness() {
73                  return 2;
74              }
75          };
76          Chromosome c3 = new DummyChromosome(3) {
77              public double fitness() {
78                  return 3;
79              }
80          };
81          Chromosome c4 = new DummyChromosome(1) {
82              public double fitness() {
83                  return 5;
84              }
85          };
86          Chromosome c5 = new DummyChromosome(15) {
87              public double fitness() {
88                  return 15;
89              }
90          };
91          
92          List<Chromosome> popChr = new ArrayList<Chromosome>();
93          popChr.add(c1);
94          popChr.add(c2);
95          popChr.add(c3);
96          Population pop = new ListPopulation(popChr,3) {
97              public Population nextGeneration() {
98                  // not important
99                  return null;
100             }
101         };
102         
103         assertNull(c5.findSameChromosome(pop));
104         assertEquals(c1, c4.findSameChromosome(pop));
105         
106         c4.searchForFitnessUpdate(pop);
107         assertEquals(1, c4.getFitness(),0);
108     }
109 
110 }
111