public void EnsureCandidateParentsUniqueTest()
{
var population = DefaultPopulationHelper.GetTestPopulation();
for (int i = 0; i < 10; i++)
{
var(candidateA, candidateB) = WorldHelper.GetCandidateParents(population);
Assert.IsFalse(candidateA.Sequence.SequenceEqual(candidateB.Sequence));
}
}
public void EnsureRankTest()
{
var population = DefaultPopulationHelper.GetTestPopulation();
MultiObjectiveHelper.UpdatePopulationFitness(population);
Assert.AreEqual(population[0].Rank, 1);
Assert.AreEqual(population[1].Rank, 1);
Assert.AreEqual(population[2].Rank, 1);
Assert.AreEqual(population[3].Rank, 2);
Assert.AreEqual(population[4].Rank, 2);
Assert.AreEqual(population[5].Rank, 2);
Assert.AreEqual(population[6].Rank, 3);
}
public void EnsureCrowdingDistanceTest()
{
double epsilon = 0.00001;
var population = DefaultPopulationHelper.GetTestPopulation();
MultiObjectiveHelper.UpdatePopulationFitness(population);
Assert.IsTrue(double.IsPositiveInfinity(population[0].CrowdingDistance));
Assert.IsTrue(Math.Abs(population[1].CrowdingDistance - 0.9428089) < epsilon);
Assert.IsTrue(double.IsPositiveInfinity(population[2].CrowdingDistance));
Assert.IsTrue(double.IsPositiveInfinity(population[3].CrowdingDistance));
Assert.IsTrue(Math.Abs(population[4].CrowdingDistance - 0.9428089) < epsilon);
Assert.IsTrue(double.IsPositiveInfinity(population[5].CrowdingDistance));
Assert.IsTrue(double.IsPositiveInfinity(population[6].CrowdingDistance));
}
public void EnsureCrowdingDistanceTournamentSelectionTest()
{
var population = DefaultPopulationHelper.GetTestPopulation();
MultiObjectiveHelper.UpdatePopulationFitness(population);
// Rank 1, float.MaxValue crowding distance
var individualA = population[0];
// Rank 1, ~5.65 crowding distance
var individualB = population[1];
var fitterIndividualA = WorldHelper.TournamentSelection(individualA, individualB);
var fitterIndividualB = WorldHelper.TournamentSelection(individualB, individualA);
Assert.AreEqual(individualA, fitterIndividualA);
Assert.AreEqual(individualA, fitterIndividualB);
}
public void EnsureRankedTournamentSelectionTest()
{
var population = DefaultPopulationHelper.GetTestPopulation();
MultiObjectiveHelper.UpdatePopulationFitness(population);
// Rank 1
var individualA = population[1];
// Rank 2
var individualB = population[3];
var fitterIndividualA = WorldHelper.TournamentSelection(individualA, individualB);
var fitterIndividualB = WorldHelper.TournamentSelection(individualB, individualA);
Assert.AreEqual(individualA, fitterIndividualA);
Assert.AreEqual(individualA, fitterIndividualB);
}