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17 package org.apache.commons.math.genetics;
18
19 import static org.junit.Assert.*;
20
21 import org.junit.Test;
22
23 public class ElitisticListPopulationTest {
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25 private static int counter = 0;
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27 @Test
28 public void testNextGeneration() {
29 ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203);
30
31 for (int i=0; i<pop.getPopulationLimit(); i++) {
32 pop.addChromosome(new DummyChromosome());
33 }
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35 Population nextGeneration = pop.nextGeneration();
36
37 assertEquals(20, nextGeneration.getPopulationSize());
38 }
39
40 private static class DummyChromosome extends Chromosome {
41 private final int fitness;
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43 public DummyChromosome() {
44 this.fitness = counter;
45 counter++;
46 }
47
48 public double fitness() {
49 return this.fitness;
50 }
51 }
52
53 }