public void Mutate_AllGenesMutablesTrue_AllGenesMutaed()
{
var target = new UniformMutation(true);
var chromosome = MockRepository.GenerateStub <ChromosomeBase>(3);
chromosome.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(1),
new Gene(1)
});
chromosome.Expect(c => c.GenerateGene(0)).Return(new Gene(0));
chromosome.Expect(c => c.GenerateGene(1)).Return(new Gene(10));
chromosome.Expect(c => c.GenerateGene(2)).Return(new Gene(20));
RandomizationProvider.Current = MockRepository.GenerateMock <IRandomization>();
target.Mutate(chromosome, 1);
Assert.AreEqual(0, chromosome.GetGene(0).Value);
Assert.AreEqual(10, chromosome.GetGene(1).Value);
Assert.AreEqual(20, chromosome.GetGene(2).Value);
chromosome.VerifyAllExpectations();
RandomizationProvider.Current.VerifyAllExpectations();
}
public IMutation UniformMutation()
{
var target = new UniformMutation();
target.Mutate(new TspChromosome(_numberOfCities), _probability);
return(target);
}
public void Should_Perform_Mutation()
{
var algorithm = new UniformMutation(1, -0.1, 0.1);
var a = new Element(new double[] { 8D, 3D, 2D, 9D, 1D, 0D, 7D, 6D, 5D, 4D });
var index = 1;
algorithm.Mutate(ref a, index);
Assert.NotEqual(3D, a.Data[1]);
Assert.InRange(a.Data[1], 2.9, 3.1);
}
public void Mutate_Indexes_RandomIndexes()
{
var target = new UniformMutation(0, 2);
var chromosome = Substitute.For <ChromosomeBase>(3);
chromosome.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(1),
new Gene(1)
});
chromosome.GenerateGene(0).Returns(new Gene(0));
chromosome.GenerateGene(2).Returns(new Gene(10));
RandomizationProvider.Current = Substitute.For <IRandomization>();
target.Mutate(chromosome, 1);
Assert.AreEqual(0, chromosome.GetGene(0).Value);
Assert.AreEqual(1, chromosome.GetGene(1).Value);
Assert.AreEqual(10, chromosome.GetGene(2).Value);
}
public void Mutate_InvalidIndexes_Exception()
{
var target = new UniformMutation(0, 3);
var chromosome = Substitute.For <ChromosomeBase>(3);
chromosome.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(1),
new Gene(1)
});
chromosome.GenerateGene(0).Returns(new Gene(0));
RandomizationProvider.Current = Substitute.For <IRandomization>();
Assert.Catch <MutationException>(() =>
{
target.Mutate(chromosome, 1);
}, "The chromosome has no gene on index 3. The chromosome genes length is 3.");
}
public void Mutate_InvalidIndexes_Exception()
{
var target = new UniformMutation(0, 3);
var chromosome = MockRepository.GenerateStub <ChromosomeBase>(3);
chromosome.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(1),
new Gene(1)
});
chromosome.Expect(c => c.GenerateGene(0)).Return(new Gene(0));
RandomizationProvider.Current = MockRepository.GenerateMock <IRandomization> ();
ExceptionAssert.IsThrowing(new MutationException(target, "The chromosome has no gene on index 3. The chromosome genes lenght is 3."), () => {
target.Mutate(chromosome, 1);
});
chromosome.VerifyAllExpectations();
RandomizationProvider.Current.VerifyAllExpectations();
}
public void Mutate_NoIndexes_RandomOneIndex()
{
var target = new UniformMutation();
var chromosome = MockRepository.GenerateStub <ChromosomeBase>(3);
chromosome.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(1),
new Gene(1)
});
chromosome.Expect(c => c.GenerateGene(1)).Return(new Gene(0));
RandomizationProvider.Current = MockRepository.GenerateMock <IRandomization>();
RandomizationProvider.Current.Expect(r => r.GetInts(1, 0, 3)).Return(new int[] { 1 });
target.Mutate(chromosome, 1);
Assert.AreEqual(1, chromosome.GetGene(0).Value);
Assert.AreEqual(0, chromosome.GetGene(1).Value);
Assert.AreEqual(1, chromosome.GetGene(2).Value);
chromosome.VerifyAllExpectations();
RandomizationProvider.Current.VerifyAllExpectations();
}