public void UniformSelectionOperator_SelectEntitiesFromPopulation_NullPopulation()
{
UniformSelectionOperator op = new UniformSelectionOperator();
PrivateObject accessor = new PrivateObject(op);
Assert.Throws <ArgumentNullException>(() => accessor.Invoke("SelectEntitiesFromPopulation", (int)0, (Population)null));
}
public void UniformSelectionOperator_Select()
{
MockGeneticAlgorithm algorithm = new MockGeneticAlgorithm
{
FitnessEvaluator = new MockFitnessEvaluator(),
GeneticEntitySeed = new MockEntity(),
PopulationSeed = new SimplePopulation(),
SelectionOperator = new UniformSelectionOperator
{
SelectionBasedOnFitnessType = FitnessType.Scaled
}
};
UniformSelectionOperator op = new UniformSelectionOperator();
op.Initialize(algorithm);
SimplePopulation population = new SimplePopulation();
population.Initialize(algorithm);
for (int i = 0; i < 4; i++)
{
MockEntity entity = new MockEntity();
entity.Initialize(algorithm);
population.Entities.Add(entity);
}
TestRandomUtil randomUtil = new TestRandomUtil();
RandomNumberService.Instance = randomUtil;
randomUtil.Value = 3;
IList <GeneticEntity> selectedEntities = op.SelectEntities(1, population);
Assert.Same(population.Entities[randomUtil.Value], selectedEntities[0]);
randomUtil.Value = 2;
selectedEntities = op.SelectEntities(1, population);
Assert.Same(population.Entities[randomUtil.Value], selectedEntities[0]);
randomUtil.Value = 1;
selectedEntities = op.SelectEntities(1, population);
Assert.Same(population.Entities[randomUtil.Value], selectedEntities[0]);
randomUtil.Value = 0;
selectedEntities = op.SelectEntities(1, population);
Assert.Same(population.Entities[randomUtil.Value], selectedEntities[0]);
}
