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Java example source code file (ListPopulationTest.java)
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The ListPopulationTest.java Java example source code
/*
* 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.math3.genetics;
import java.util.ArrayList;
import java.util.Iterator;
import org.apache.commons.math3.exception.NotPositiveException;
import org.apache.commons.math3.exception.NumberIsTooLargeException;
import org.apache.commons.math3.exception.NumberIsTooSmallException;
import org.junit.Assert;
import org.junit.Test;
public class ListPopulationTest {
@Test
public void testGetFittestChromosome() {
Chromosome c1 = new Chromosome() {
public double fitness() {
return 0;
}
};
Chromosome c2 = new Chromosome() {
public double fitness() {
return 10;
}
};
Chromosome c3 = new Chromosome() {
public double fitness() {
return 15;
}
};
ArrayList<Chromosome> chromosomes = new ArrayList ();
chromosomes.add(c1);
chromosomes.add(c2);
chromosomes.add(c3);
ListPopulation population = new ListPopulation(chromosomes, 10) {
public Population nextGeneration() {
// not important
return null;
}
};
Assert.assertEquals(c3, population.getFittestChromosome());
}
@Test
public void testChromosomes() {
final ArrayList<Chromosome> chromosomes = new ArrayList ();
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
final ListPopulation population = new ListPopulation(10) {
public Population nextGeneration() {
// not important
return null;
}
};
population.addChromosomes(chromosomes);
Assert.assertEquals(chromosomes, population.getChromosomes());
Assert.assertEquals(chromosomes.toString(), population.toString());
population.setPopulationLimit(50);
Assert.assertEquals(50, population.getPopulationLimit());
}
@Test(expected = NotPositiveException.class)
public void testSetPopulationLimit() {
final ListPopulation population = new ListPopulation(10) {
public Population nextGeneration() {
// not important
return null;
}
};
population.setPopulationLimit(-50);
}
@Test(expected = NotPositiveException.class)
public void testConstructorPopulationLimitNotPositive() {
new ListPopulation(-10) {
public Population nextGeneration() {
// not important
return null;
}
};
}
@Test(expected = NotPositiveException.class)
public void testChromosomeListConstructorPopulationLimitNotPositive() {
final ArrayList<Chromosome> chromosomes = new ArrayList ();
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
new ListPopulation(chromosomes, -10) {
public Population nextGeneration() {
// not important
return null;
}
};
}
@Test(expected = NumberIsTooLargeException.class)
public void testConstructorListOfChromosomesBiggerThanPopulationSize() {
final ArrayList<Chromosome> chromosomes = new ArrayList ();
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
new ListPopulation(chromosomes, 1) {
public Population nextGeneration() {
// not important
return null;
}
};
}
@Test(expected=NumberIsTooLargeException.class)
public void testAddTooManyChromosomes() {
final ArrayList<Chromosome> chromosomes = new ArrayList ();
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
final ListPopulation population = new ListPopulation(2) {
public Population nextGeneration() {
// not important
return null;
}
};
population.addChromosomes(chromosomes);
}
@Test(expected=NumberIsTooLargeException.class)
public void testAddTooManyChromosomesSingleCall() {
final ListPopulation population = new ListPopulation(2) {
public Population nextGeneration() {
// not important
return null;
}
};
for (int i = 0; i <= population.getPopulationLimit(); i++) {
population.addChromosome(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
}
}
@Test(expected = UnsupportedOperationException.class)
public void testIterator() {
final ArrayList<Chromosome> chromosomes = new ArrayList();
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
final ListPopulation population = new ListPopulation(10) {
public Population nextGeneration() {
// not important
return null;
}
};
population.addChromosomes(chromosomes);
final Iterator<Chromosome> iter = population.iterator();
while (iter.hasNext()) {
iter.next();
iter.remove();
}
}
@Test(expected=NumberIsTooSmallException.class)
public void testSetPopulationLimitTooSmall() {
final ArrayList<Chromosome> chromosomes = new ArrayList ();
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
chromosomes.add(new DummyBinaryChromosome(BinaryChromosome.randomBinaryRepresentation(3)));
final ListPopulation population = new ListPopulation(chromosomes, 3) {
public Population nextGeneration() {
// not important
return null;
}
};
population.setPopulationLimit(2);
}
}
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