public void Mutate_Indexes_RandomIndexes()
{
var target = new UniformMutation(0, 2);
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(2)).Return(new Gene(10));
RandomizationProvider.Current = MockRepository.GenerateMock<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);
chromosome.VerifyAllExpectations();
RandomizationProvider.Current.VerifyAllExpectations();
}
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();
}
