public void CreateRandomGenomeThrowsErrorIfNoValidGenomesExist()
{
// Create genome builder that does not accept any genome.
var genomeBuilder = GenomeBuilderTest.CreateCustomGenomeBuilder(
mutationRate: 0,
isValidFunction: candidate => false);
// CreateRandomGenome will create a genome and try to repair it afterwards.
// It should then throw an exception as that will never work.
Assert.Throws <TimeoutException>(() => genomeBuilder.CreateRandomGenome(age: 0));
}
public void MakeGenomeValidThrowsIfNoValidGenomeExists()
{
// Create genome builder that does not accept any genome.
var genomeBuilder = GenomeBuilderTest.CreateCustomGenomeBuilder(
mutationRate: 0,
isValidFunction: candidate => false);
// Try to repair a genome.
var genome = GenomeBuilderTest.BuildFittingGenome();
Assert.Throws <TimeoutException>(() => genomeBuilder.MakeGenomeValid(genome));
}
public void MutateThrowsErrorIfNoValidGenomesExist()
{
// Create genome builder that does not accept any genome.
var genomeBuilder = GenomeBuilderTest.CreateCustomGenomeBuilder(
mutationRate: 0,
isValidFunction: candidate => false);
// Build a genome.
var genome = GenomeBuilderTest.BuildFittingGenome();
// Mutate will try to repair the genome and should throw an exception as that will never work.
Assert.Throws <TimeoutException>(() => genomeBuilder.Mutate(genome));
}
public void MakeGenomeValidRepairsInvalidGenome()
{
// Invalid genomes must exist. We forbid having a value of 3 for a certain gene.
int forbiddenValue = 3;
Func <Genome, bool> doesNotHave3ForInt1To5 = candidate =>
!object.Equals(candidate.GetGeneValue(GenomeBuilderTest.SmallValueParameter).GetValue(), forbiddenValue);
// Create a genome builder implementing that check.
var genomeBuilder = GenomeBuilderTest.CreateCustomGenomeBuilder(
mutationRate: 0,
isValidFunction: doesNotHave3ForInt1To5);
var genome = GenomeBuilderTest.BuildFittingGenome();
genome.SetGene(GenomeBuilderTest.SmallValueParameter, new Allele <int>(forbiddenValue));
genomeBuilder.MakeGenomeValid(genome);
Assert.True(genomeBuilder.IsGenomeValid(genome), $"{genome} should be valid after repairing it.");
}
public void MutateRepairsInvalidGenomes()
{
// Invalid genomes must exist. We forbid having a value of 3 for a certain gene.
int forbiddenValue = 3;
Func <Genome, bool> doesNotHave3ForInt1To5 = candidate =>
!object.Equals(candidate.GetGeneValue(GenomeBuilderTest.SmallValueParameter).GetValue(), forbiddenValue);
// Create a genome builder implementing that check. It also should never mutate randomly
// so we can be sure the repair was not due to the mutation itself.
var genomeBuilder = GenomeBuilderTest.CreateCustomGenomeBuilder(
mutationRate: 0,
isValidFunction: doesNotHave3ForInt1To5);
// Build an invalid genome.
var genome = GenomeBuilderTest.BuildFittingGenome();
genome.SetGene(GenomeBuilderTest.SmallValueParameter, new Allele <int>(forbiddenValue));
// Mutate and check the broken gene was fixed.
genomeBuilder.Mutate(genome);
Assert.NotEqual(
forbiddenValue,
genome.GetGeneValue(GenomeBuilderTest.SmallValueParameter).GetValue());
}
