public void Cross_ChromosomeLengthLowerThan3_Exception()
{
var target = new TwoPointCrossover(0, 1);
var chromosome1 = MockRepository.GenerateStub<ChromosomeBase>(2);
ExceptionAssert.IsThrowing(new CrossoverException(target, "A chromosome should have, at least, 3 genes. {0} has only 2 gene.".With(chromosome1.GetType().Name)), () =>
{
target.Cross(new List<IChromosome>() {
chromosome1,
chromosome1
});
});
}
public void Cross_LessGenesThenSecondSwapPoint_Exception()
{
var target = new TwoPointCrossover(1, 3);
var chromosome1 = MockRepository.GenerateStub<ChromosomeBase>(3);
ExceptionAssert.IsThrowing(new ArgumentOutOfRangeException("parents", "The swap point two index is 3, but there is only 3 genes. The swap should result at least one gene to each sides."), () =>
{
target.Cross(new List<IChromosome>() {
chromosome1,
chromosome1
});
});
var chromosome2 = MockRepository.GenerateStub<ChromosomeBase>(4);
ExceptionAssert.IsThrowing(new ArgumentOutOfRangeException("parents", "The swap point two index is 3, but there is only 4 genes. The swap should result at least one gene to each sides."), () =>
{
target.Cross(new List<IChromosome>() {
chromosome2,
chromosome2
});
});
}
public void Cross_ParentsWithTwoGenes_Cross()
{
var target = new TwoPointCrossover(0, 1);
var chromosome1 = MockRepository.GenerateStub<ChromosomeBase>(4);
chromosome1.ReplaceGenes(0, new Gene[]
{
new Gene(1),
new Gene(2),
new Gene(3),
new Gene(4),
});
chromosome1.Expect(c => c.CreateNew()).Return(MockRepository.GenerateStub<ChromosomeBase>(4));
var chromosome2 = MockRepository.GenerateStub<ChromosomeBase>(4);
chromosome2.ReplaceGenes(0, new Gene[]
{
new Gene(5),
new Gene(6),
new Gene(7),
new Gene(8)
});
chromosome2.Expect(c => c.CreateNew()).Return(MockRepository.GenerateStub<ChromosomeBase>(4));
var actual = target.Cross(new List<IChromosome>() { chromosome1, chromosome2 });
Assert.AreEqual(2, actual.Count);
Assert.AreEqual(4, actual[0].Length);
Assert.AreEqual(4, actual[1].Length);
Assert.AreEqual(1, actual[0].GetGene(0).Value);
Assert.AreEqual(6, actual[0].GetGene(1).Value);
Assert.AreEqual(3, actual[0].GetGene(2).Value);
Assert.AreEqual(4, actual[0].GetGene(3).Value);
Assert.AreEqual(5, actual[1].GetGene(0).Value);
Assert.AreEqual(2, actual[1].GetGene(1).Value);
Assert.AreEqual(7, actual[1].GetGene(2).Value);
Assert.AreEqual(8, actual[1].GetGene(3).Value);
}