public void WhenMutationIsRequested_Double_ContextMethod_AllValuesChangedWithinVariance()
{
var population = new Population <double> ();
(InitialiserContextProvider.GetContext <double>() as DoubleBasedGenomeInitialiserContext).Min = 100d;
(InitialiserContextProvider.GetContext <double>() as DoubleBasedGenomeInitialiserContext).Max = 200d;
population.Initialise(1, 10000);
ConfigurationProvider.Mutation.ChanceOfMutation = 1;
ConfigurationProvider.Mutation.MutationMethod = MutationConfiguration.MutationStyle.Variance;
ConfigurationProvider.Mutation.ContextMutationVariance = .25;
var mutator = MutationProvider.GetMutator <double> ();
double initialState = 150d;
population[0].Code.For((item, i) => {
population[0].Code [i] = initialState;
});
mutator.Mutate(population);
double variance = 25d;
population[0].Code.For((item, i) => {
Assert.GreaterOrEqual(item, initialState - variance);
Assert.LessOrEqual(item, initialState + variance);
});
}
public void WhenIntBasedContextRequested_DefaultValues_MaxValueShouldBe_255()
{
var context = InitialiserContextProvider.GetContext <int> ();
JObject properties = context.Serialise();
Assert.AreEqual(256, properties.Value <int> ("Max"));
}
public void WhenIntBasedPopulationInInitialised_MinAndMaxEqual_ValuesShouldBeCorrect()
{
int min = 186, max = min;
Population <int> population = new Population <int> ();
var context = InitialiserContextProvider.GetContext <int> () as IntBasedGenomeInitialiserContext;
context.Min = min;
context.Max = max;
population.Initialise(context, 100, 5000);
population.Individuals.ForEach(i => {
foreach (int x in i.Code)
{
Assert.AreEqual(186, x);
}
});
}
public void WhenMutationIsRequested_Int_ContextMethod_AllValuesChangedWithinVariance()
{
Population <int> population = new Population <int> ();
(InitialiserContextProvider.GetContext <int>() as IntBasedGenomeInitialiserContext).Min = 100;
(InitialiserContextProvider.GetContext <int>() as IntBasedGenomeInitialiserContext).Max = 200;
population.Initialise(1, 10000);
ConfigurationProvider.Mutation.ChanceOfMutation = 1;
ConfigurationProvider.Mutation.MutationMethod = MutationConfiguration.MutationStyle.Variance;
ConfigurationProvider.Mutation.ContextMutationVariance = .25;
Mutator <int> mutator = MutationProvider.GetMutator <int> ();
population[0].Code.For((item, i) => {
int mod5 = i % 5;
population[0].Code [i] = 10 + ((mod5 % 5) * 10)
+ (InitialiserContextProvider.GetContext <int>() as IntBasedGenomeInitialiserContext).Min;
});
mutator.Mutate(population);
int variance = 25;
population[0].Code.For((item, i) => {
int mod5 = i % 5;
int original = 10 + ((mod5 % 5) * 10)
+ (InitialiserContextProvider.GetContext <int>() as IntBasedGenomeInitialiserContext).Min;
int min = original - variance;
int max = original + variance;
Assert.GreaterOrEqual(item, min);
Assert.LessOrEqual(item, max);
});
}
public void WhenMutationIsRequested_Double_ContextMethod_VarianceIsApprox50pcNegativeVariance()
{
var population = new Population <double> ();
(InitialiserContextProvider.GetContext <double> () as DoubleBasedGenomeInitialiserContext).Min = 100d;
(InitialiserContextProvider.GetContext <double> () as DoubleBasedGenomeInitialiserContext).Max = 200d;
var genomeCount = 10000;
population.Initialise(1, genomeCount);
ConfigurationProvider.Mutation.ChanceOfMutation = 1;
ConfigurationProvider.Mutation.MutationMethod = MutationConfiguration.MutationStyle.Variance;
ConfigurationProvider.Mutation.ContextMutationVariance = .25;
Mutator <double> mutator = MutationProvider.GetMutator <double> ();
population [0].Code.For((item, i) => {
population [0].Code [i] = 150;
});
mutator.Mutate(population);
int negativeVarianceCount = 0;
population [0].Code.For((item, i) => {
if (item < 150)
{
negativeVarianceCount += 1;
}
});
//assume between 45% and 55%
double acceptableMin = (double)genomeCount * ((double)4.5 / 10);
double acceptableMax = (double)genomeCount * ((double)5.5 / 10);
Assert.GreaterOrEqual(negativeVarianceCount, acceptableMin);
Assert.LessOrEqual(negativeVarianceCount, acceptableMax);
}
public void WhenMutationIsSetToVariance_Double_CheckedOverflow_MutationLessThanMinFloorAtMin()
{
var population = new Population <double> ();
(InitialiserContextProvider.GetContext <double> () as DoubleBasedGenomeInitialiserContext).Min = 10d;
(InitialiserContextProvider.GetContext <double> () as DoubleBasedGenomeInitialiserContext).Max = 110d;
DoubleBasedSingleInitialiser initialiser = new DoubleBasedSingleInitialiser(
(InitialiserContextProvider.GetContext <double> () as DoubleBasedGenomeInitialiserContext).Min);
InitialiserProvider.AddInitialiser(initialiser);
var genomeLength = 100000;
population.Initialise(1, genomeLength);
ConfigurationProvider.Mutation.AllowUncheckedVariance = false;
ConfigurationProvider.Mutation.ChanceOfMutation = 1;
ConfigurationProvider.Mutation.ContextMutationVariance = .1;
ConfigurationProvider.Mutation.MutationMethod = MutationConfiguration.MutationStyle.Variance;
Mutator <double> mutator = MutationProvider.GetMutator <double> ();
mutator.Mutate(population);
int underflowCount = 0;
population [0].Code.ForEach(i => {
underflowCount +=
i == (InitialiserContextProvider.GetContext <double> () as DoubleBasedGenomeInitialiserContext).Min ? 1 : 0;
});
double acceptableMin = (double)genomeLength * ((double)4.5d / 10);
double acceptableMax = (double)genomeLength * ((double)5.5d / 10);
Assert.LessOrEqual(underflowCount, acceptableMax);
Assert.GreaterOrEqual(underflowCount, acceptableMin);
}
public void WhenMutationIsSetToVariance_Byte_UncheckedOverflow_MutationLessThanMinUnderflowToMax()
{
Population <byte> population = new Population <byte> ();
(InitialiserContextProvider.GetContext <byte> () as ByteBasedGenomeInitialiserContext).Min = 0;
(InitialiserContextProvider.GetContext <byte> () as ByteBasedGenomeInitialiserContext).Max = 100;
ByteBasedSingleInitialiser initialiser = new ByteBasedSingleInitialiser(
(InitialiserContextProvider.GetContext <byte> () as ByteBasedGenomeInitialiserContext).Min);
InitialiserProvider.AddInitialiser(initialiser);
var genomeLength = 1000;
population.Initialise(1, genomeLength);
ConfigurationProvider.Mutation.AllowUncheckedVariance = true;
ConfigurationProvider.Mutation.ChanceOfMutation = 1;
ConfigurationProvider.Mutation.ContextMutationVariance = .1;
ConfigurationProvider.Mutation.MutationMethod = MutationConfiguration.MutationStyle.Variance;
Mutator <byte> mutator = MutationProvider.GetMutator <byte> ();
mutator.Mutate(population);
int overflowCount = 0;
population [0].Code.ForEach(i => {
overflowCount += i >= 90 ? 1 : 0;
});
double acceptableMin = (double)genomeLength * ((double)4.5d / 10);
double acceptableMax = (double)genomeLength * ((double)5.5d / 10);
Assert.LessOrEqual(overflowCount, acceptableMax);
Assert.GreaterOrEqual(overflowCount, acceptableMin);
}
public void WhenIntBasedContextRequested_ShouldReturn()
{
var context = InitialiserContextProvider.GetContext <int> ();
Assert.IsNotNull(context);
}
public void WhenInitialiserContextProviderCalled_ContextDoesNotExist_ShouldThrowException()
{
InitialiserContextProvider.GetContext <UIntPtr> ();
Assert.Fail();
}
public void WhenInitialiserContextProviderCalled_ContextExists_ContextShouldBeOfCorrectType()
{
var context = InitialiserContextProvider.GetContext <int> ();
Assert.AreEqual(typeof(int), context.GenomeType);
}
public void WhenInitialiserContextProviderCalled_ContextExists_ShouldNotReturnNull()
{
Assert.IsNotNull(InitialiserContextProvider.GetContext <int> ());
}
public void WhenInitialiserContextProviderCalled_ContextExists_ShouldNotThrowException()
{
InitialiserContextProvider.GetContext <byte> ();
Assert.Pass();
}