public async Task ElitismStrategy_GetElitistGeneticEntities()
{
double elitismRatio = .1;
int totalGeneticEntities = 100;
GeneticAlgorithm algorithm = GetGeneticAlgorithm(elitismRatio);
await algorithm.InitializeAsync();
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
for (int i = 0; i < totalGeneticEntities; i++)
{
MockEntity entity = new MockEntity();
entity.Initialize(algorithm);
population.Entities.Add(entity);
}
algorithm.Environment.Populations.Add(population);
MockElitismStrategy strategy = (MockElitismStrategy)algorithm.ElitismStrategy;
strategy.Initialize(algorithm);
IList <GeneticEntity> geneticEntities = strategy.GetEliteEntities(population);
Assert.Equal(Convert.ToInt32(Math.Round(elitismRatio * totalGeneticEntities)), geneticEntities.Count);
}
public void BoltzmannSelectionOperator_Select()
{
double initialTemp = 10;
GeneticAlgorithm algorithm = GetMockAlgorithm(initialTemp);
FakeBoltzmannSelectionOperator op = (FakeBoltzmannSelectionOperator)algorithm.SelectionOperator;
op.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
MockEntity entity1 = new MockEntity();
entity1.Initialize(algorithm);
population.Entities.Add(entity1);
MockEntity entity2 = new MockEntity();
entity2.Initialize(algorithm);
population.Entities.Add(entity2);
IEnumerable <GeneticEntity> entities = op.SelectEntities(2, population);
Assert.NotNull(entities);
Assert.True(entities.Count() > 0, "An entity should have been selected.");
}
public async Task Population_Initialize_Async()
{
GeneticAlgorithm algorithm = new MockGeneticAlgorithm
{
FitnessEvaluator = new MockFitnessEvaluator(),
SelectionOperator = new MockSelectionOperator(),
GeneticEntitySeed = new MockEntity
{
TestProperty = 3
},
PopulationSeed = new MockPopulation
{
MinimumPopulationSize = 10
}
};
algorithm.GeneticEntitySeed.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
await population.InitializeAsync();
Assert.Equal(algorithm.PopulationSeed.MinimumPopulationSize, population.Entities.Count);
Assert.Equal(3, ((MockEntity)population.Entities[0]).TestProperty);
}
public void SelectionOperator_Select_EmptyPopulation()
{
GeneticAlgorithm algorithm = GetAlgorithm();
MockSelectionOperator op = new MockSelectionOperator();
op.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
Assert.Throws <ArgumentException>(() => op.SelectEntities(1, population));
}
public void ElitismStrategy_GetElitistGeneticEntities_EmptyPopulation()
{
GeneticAlgorithm algorithm = GetGeneticAlgorithm(.1);
MockElitismStrategy strategy = new MockElitismStrategy();
strategy.Initialize(algorithm);
MockPopulation pop = new MockPopulation();
pop.Initialize(algorithm);
Assert.Throws <ArgumentException>(() => strategy.GetEliteEntities(pop));
}
public void FitnessScalingStrategy_Scale_EmptyPopulation()
{
GeneticAlgorithm algorithm = GetAlgorithm();
FakeFitnessScalingStrategy2 strategy = new FakeFitnessScalingStrategy2();
strategy.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
Assert.Throws <ArgumentException>(() => strategy.Scale(population));
}
public void Population_Ctor()
{
GeneticAlgorithm algorithm = new MockGeneticAlgorithm
{
SelectionOperator = new MockSelectionOperator(),
FitnessEvaluator = new MockFitnessEvaluator(),
GeneticEntitySeed = new MockEntity(),
PopulationSeed = new MockPopulation(),
};
Population population = new MockPopulation();
population.Initialize(algorithm);
PrivateObject accessor = new PrivateObject(population);
Assert.Same(algorithm, accessor.GetProperty("Algorithm"));
}
public void BoltzmannSelectionOperator_Select_Overflow()
{
double initialTemp = .0000001;
MockGeneticAlgorithm algorithm = GetMockAlgorithm(initialTemp);
FakeBoltzmannSelectionOperator op = new FakeBoltzmannSelectionOperator();
op.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
MockEntity entity = new MockEntity();
entity.Initialize(algorithm);
entity.ScaledFitnessValue = 1;
population.Entities.Add(entity);
Assert.Throws <OverflowException>(() => op.SelectEntities(1, population));
}
public void FitnessScalingStrategy_Scale()
{
GeneticAlgorithm algorithm = GetAlgorithm();
FakeFitnessScalingStrategy2 strategy = new FakeFitnessScalingStrategy2();
strategy.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
MockEntity entity = new MockEntity();
entity.Initialize(algorithm);
population.Entities.Add(entity);
strategy.Scale(population);
Assert.True(strategy.OnScaleCalled, "ScaleCore was not called.");
}
private static MockPopulation GetPopulation(GeneticAlgorithm algorithm)
{
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
MockEntity entity1 = new MockEntity();
entity1.Initialize(algorithm);
entity1.Identifier = "5";
MockEntity entity2 = new MockEntity();
entity2.Initialize(algorithm);
entity2.Identifier = "2";
population.Entities.Add(entity1);
population.Entities.Add(entity2);
return(population);
}
public void SelectionOperator_Select()
{
GeneticAlgorithm algorithm = GetAlgorithm();
MockSelectionOperator op = new MockSelectionOperator();
op.Initialize(algorithm);
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
GeneticEntity entity1 = new MockEntity();
entity1.Initialize(algorithm);
GeneticEntity entity2 = new MockEntity();
entity2.Initialize(algorithm);
population.Entities.Add(entity1);
population.Entities.Add(entity2);
IList <GeneticEntity> selectedEntities = op.SelectEntities(1, population);
Assert.Same(entity1, selectedEntities[0]);
Assert.Equal(1, op.DoSelectCallCount);
}
public void Population_Ctor_NullAlgorithm()
{
MockPopulation population = new MockPopulation();
Assert.Throws <ArgumentNullException>(() => population.Initialize(null));
}
private static async Task TestEvaluateFitnessAsync(bool useScaling, bool useMetric)
{
GeneticAlgorithm algorithm = new MockGeneticAlgorithm
{
SelectionOperator = new MockSelectionOperator(),
GeneticEntitySeed = new MockEntity(),
PopulationSeed = new MockPopulation(),
FitnessEvaluator = new MockFitnessEvaluator(),
};
if (useScaling)
{
algorithm.FitnessScalingStrategy = new FakeFitnessScalingStrategy();
}
if (useMetric)
{
algorithm.Metrics.Add(new MockMetric());
}
algorithm.FitnessEvaluator = new MockFitnessEvaluator();
algorithm.FitnessEvaluator.Initialize(algorithm);
if (useScaling)
{
algorithm.FitnessScalingStrategy = new FakeFitnessScalingStrategy();
algorithm.FitnessScalingStrategy.Initialize(algorithm);
}
MockPopulation population = new MockPopulation();
population.Initialize(algorithm);
MockEntity entity1 = new MockEntity();
entity1.Initialize(algorithm);
entity1.Identifier = "123";
population.Entities.Add(entity1);
MockEntity entity2 = new MockEntity();
entity2.Initialize(algorithm);
entity2.Identifier = "456";
population.Entities.Add(entity2);
await population.EvaluateFitnessAsync();
Assert.Equal((double)123, entity1.RawFitnessValue);
Assert.Equal((double)456, entity2.RawFitnessValue);
if (useScaling)
{
Assert.Equal(entity1.RawFitnessValue - 1, entity1.ScaledFitnessValue);
Assert.Equal(entity2.RawFitnessValue - 1, entity2.ScaledFitnessValue);
}
else
{
Assert.Equal(entity1.RawFitnessValue, entity1.ScaledFitnessValue);
Assert.Equal(entity2.RawFitnessValue, entity2.ScaledFitnessValue);
}
if (!useMetric && !useScaling)
{
Assert.False(population.RawMax.HasValue, "RawMax not set correctly.");
Assert.False(population.RawMin.HasValue, "RawMax not set correctly.");
Assert.False(population.RawMean.HasValue, "RawMean not set correctly.");
Assert.False(population.RawStandardDeviation.HasValue, "RawStandardDeviation not set correctly.");
}
else
{
Assert.Equal(entity2.RawFitnessValue, population.RawMax);
Assert.Equal(entity1.RawFitnessValue, population.RawMin);
Assert.Equal((entity1.RawFitnessValue + entity2.RawFitnessValue) / 2, population.RawMean);
}
}
