| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.math4.legacy.genetics; |
| |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.commons.math4.legacy.exception.OutOfRangeException; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| public class ElitisticListPopulationTest { |
| |
| private static int counter = 0; |
| |
| @Test |
| public void testNextGeneration() { |
| ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203); |
| |
| for (int i=0; i<pop.getPopulationLimit(); i++) { |
| pop.addChromosome(new DummyChromosome()); |
| } |
| |
| Population nextGeneration = pop.nextGeneration(); |
| |
| Assert.assertEquals(20, nextGeneration.getPopulationSize()); |
| } |
| |
| @Test |
| public void testSetElitismRate() { |
| final double rate = 0.25; |
| final ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203); |
| pop.setElitismRate(rate); |
| Assert.assertEquals(rate, pop.getElitismRate(), 1e-6); |
| } |
| |
| @Test(expected = OutOfRangeException.class) |
| public void testSetElitismRateTooLow() { |
| final double rate = -0.25; |
| final ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203); |
| pop.setElitismRate(rate); |
| } |
| |
| @Test(expected = OutOfRangeException.class) |
| public void testSetElitismRateTooHigh() { |
| final double rate = 1.25; |
| final ElitisticListPopulation pop = new ElitisticListPopulation(100, 0.203); |
| pop.setElitismRate(rate); |
| } |
| |
| @Test(expected = OutOfRangeException.class) |
| public void testConstructorTooLow() { |
| final double rate = -0.25; |
| new ElitisticListPopulation(100, rate); |
| } |
| |
| @Test(expected = OutOfRangeException.class) |
| public void testConstructorTooHigh() { |
| final double rate = 1.25; |
| new ElitisticListPopulation(100, rate); |
| } |
| |
| @Test(expected = OutOfRangeException.class) |
| public void testChromosomeListConstructorTooLow() { |
| final List<Chromosome> chromosomes = Collections.emptyList(); |
| final double rate = -0.25; |
| new ElitisticListPopulation(chromosomes, 100, rate); |
| } |
| |
| @Test(expected = OutOfRangeException.class) |
| public void testChromosomeListConstructorTooHigh() { |
| final List<Chromosome> chromosomes = Collections.emptyList(); |
| final double rate = 1.25; |
| new ElitisticListPopulation(chromosomes, 100, rate); |
| } |
| |
| private static class DummyChromosome extends Chromosome { |
| private final int fitness; |
| |
| DummyChromosome() { |
| this.fitness = counter; |
| counter++; |
| } |
| |
| @Override |
| public double fitness() { |
| return this.fitness; |
| } |
| } |
| |
| } |