public void Evolve_ManyGenerations_Fast()
{
int numberOfCities = 40;
var selection = new EliteSelection();
var crossover = new OrderedCrossover();
var mutation = new TworsMutation();
var chromosome = new TspChromosome(numberOfCities);
var fitness = new TspFitness (numberOfCities, 0, 1000, 0, 1000);
var population = new Population (40, 40, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.Start();
var firstDistance = ((TspChromosome)ga.Population.BestChromosome).Distance;
ga.Termination = new GenerationNumberTermination (1001);
TimeAssert.LessThan(3000, () =>
{
ga.Start();
});
var lastDistance = ((TspChromosome)ga.Population.BestChromosome).Distance;
Assert.Less(lastDistance, firstDistance);
}
public void Evolve_ManyGenerations_Fast()
{
int movesAhead = 10;
int boardSize = 10;
var selection = new EliteSelection();
var crossover = new OrderedCrossover();
var mutation = new TworsMutation();
var chromosome = new CheckersChromosome(movesAhead, boardSize);
var fitness = new CheckersFitness(new CheckersBoard(boardSize));
var population = new Population(40, 40, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.GenerationRan += delegate
{
if (ga.Population.GenerationsNumber % 100 == 0)
{
fitness.Update(ga.Population.BestChromosome as CheckersChromosome);
}
};
ga.Start();
var firstFitness = ((CheckersChromosome)ga.Population.BestChromosome).Fitness;
ga.Termination = new GenerationNumberTermination(2001);
TimeAssert.LessThan(100000, () =>
{
ga.Start();
});
var lastFitness = ((CheckersChromosome)ga.Population.BestChromosome).Fitness;
Assert.LessOrEqual(firstFitness, lastFitness);
}
public void Mutate_ValidChromosome_ExchangeGenes()
{
var target = new TworsMutation();
var chromosome = MockRepository.GenerateStub<ChromosomeBase>(4);
chromosome.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(2),
new Gene(3),
new Gene(4),
});
var rnd = MockRepository.GenerateMock<IRandomization>();
rnd.Expect(r => r.GetUniqueInts(2, 0, 4)).Return(new int[] { 0, 2 });
RandomizationProvider.Current = rnd;
target.Mutate(chromosome, 1);
Assert.AreEqual(4, chromosome.Length);
Assert.AreEqual(3, chromosome.GetGene(0).Value);
Assert.AreEqual(2, chromosome.GetGene(1).Value);
Assert.AreEqual(1, chromosome.GetGene(2).Value);
Assert.AreEqual(4, chromosome.GetGene(3).Value);
rnd.VerifyAllExpectations();
chromosome.VerifyAllExpectations();
}