public void WhenSelectorIsRequested_Tournament_AlteredConfiguration_CorrectSelectionShouldBeReturned()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Tournament);
ConfigurationProvider.Selection.NumberOfFittestSelected = 3;
population.Initialise(5, 5);
for (int i = 0; i < population.Individuals.Count; i++)
{
for (int j = 0; j < population.Individuals [0].GenomeLength; j++)
{
population.Individuals [i].Code [j] = i;
}
}
List <Individual <int> > fittest = selector.SelectFittest(population, new double[] { .4d, .85d, .3d, .9d, .81d }).ToList();
Assert.AreEqual(fittest.Select(f => f.Code),
new List <List <int> > {
new List <int> {
3, 3, 3, 3, 3
},
new List <int> {
1, 1, 1, 1, 1
},
new List <int> {
4, 4, 4, 4, 4
}
});
}
public void WhenSelectorIsRequested_Truncation_AlteredConfiguration_CorrectSelectionShouldBeReturned()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Truncation);
ConfigurationProvider.Selection.RatioOfFittestInTruncationSelection = .2m;
population.Initialise(10, 3);
for (int i = 0; i < population.Individuals.Count; i++)
{
for (int j = 0; j < population.Individuals [0].GenomeLength; j++)
{
population.Individuals [i].Code [j] = i - j;
}
}
List <Individual <int> > fittest = selector.SelectFittest(population,
new double[] { .1d, .15d, .2d, .5d, .25d, .3d, .35d, .4d, .45d, .55d }).ToList();
Assert.AreEqual(
fittest.Select(f => f.Code).ToList(),
new List <List <int> > {
new List <int> {
9, 8, 7
},
new List <int> {
3, 2, 1
}
});
}
public void WhenSelectorIsRequested_Roulette_AlteredConfiguration_SortDirectoryDescending_CorrectSelectionFitnessShouldBeReturned()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Roulette);
population.Initialise(9, 10);
for (int i = 0; i < population.Individuals.Count; i++)
{
for (int j = 0; j < population.Individuals [0].GenomeLength; j++)
{
population.Individuals [i].Code [j] = i + j;
}
}
ConfigurationProvider.Selection.ForcedRouletteThreshold = 1.2d;
ConfigurationProvider.Selection.NumberOfFittestSelected = 4;
ConfigurationProvider.Selection.RouletteFitnessSortDirection = SelectionConfiguration.RouletteFitnessDirection.Descending;
List <Individual <int> > fittest = selector.SelectFittest(population,
new double[] { .11d, .22d, .33d, .44d, .55d, .66d, .77d, .88d, .99d }).ToList();
Assert.AreEqual(
new List <double> {
Math.Round(.88d, 2),
Math.Round(.77d, 2),
Math.Round(.66d, 2),
Math.Round(.55d, 2)
},
fittest.Select(f => Math.Round(f.Fitness.Value, 2)).ToList());
}
public void WhenSelectorIsRequested_Tournament_CorrectSelectionShouldBeReturned()
{
TournamentSelector selector = new TournamentSelector();
Selector requested = SelectionProvider.GetSelector(SelectionType.Tournament);
Assert.AreEqual(selector.Name, requested.Name);
}
public void WhenSelectorIsOverloadedAndRequested_Custom_CorrectSelectorShouldBeReturned()
{
CustomSelector selector = new CustomSelector();
SelectionProvider.Add(selector);
Selector requested = SelectionProvider.GetSelector(SelectionType.Custom);
Assert.AreSame(selector, requested);
}
public void WhenSelectorIsRequested_Roulette_MaxThresholdCalculatedShouldBeCorrect()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Roulette);
population.Initialise(9, 10);
selector.SelectFittest(population,
new double[] { .11d, .22d, .33d, .44d, .55d, .66d, .77d, .88d, .99d }).ToList();
Assert.AreEqual(Math.Round(4.95d, 2), Math.Round((selector as RouletteSelector).LastMaxThreshold, 2));
}
public void WhenSelectorIsRequested_Tournament_AlteredConfiguration_CorrectSelectionCountShouldBeReturned()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Tournament);
ConfigurationProvider.Selection.NumberOfFittestSelected = 3;
population.Initialise(5, 100);
List <Individual <int> > fittest = selector.SelectFittest(population, new double[] { .4d, .85d, .3d, .9, .81 }).ToList();
Assert.AreEqual(3, fittest.Count);
}
public void WhenSelectorIsRequested_Truncation_AlteredConfiguration_CorrectSelectionCountShouldBeReturned()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Truncation);
ConfigurationProvider.Selection.RatioOfFittestInTruncationSelection = .2m;
population.Initialise(10, 3);
List <Individual <int> > fittest = selector.SelectFittest(population,
new double[] { .1d, .15d, .2d, .25d, .3d, .35d, .4d, .45d, .5d, .55d }).ToList();
Assert.AreEqual(2, fittest.Count);
}
public void WhenSelectorIsRequested_Roulette_AlteredConfiguration_CorrectSelectionShouldBeReturned()
{
Population <int> population = new Population <int> ();
Selector selector = SelectionProvider.GetSelector(SelectionType.Roulette);
population.Initialise(9, 10);
for (int i = 0; i < population.Individuals.Count; i++)
{
for (int j = 0; j < population.Individuals [0].GenomeLength; j++)
{
population.Individuals [i].Code [j] = i;
}
}
ConfigurationProvider.Selection.ForcedRouletteThreshold = 1.2d;
ConfigurationProvider.Selection.NumberOfFittestSelected = 4;
List <Individual <int> > fittest = selector.SelectFittest(population,
new double[] { .11d, .22d, .33d, .44d, .55d, .66d, .77d, .88d, .99d }).ToList();
Assert.AreEqual(
new List <List <int> > {
new List <int> {
4, 4, 4, 4, 4, 4, 4, 4, 4, 4
},
new List <int> {
5, 5, 5, 5, 5, 5, 5, 5, 5, 5
},
new List <int> {
6, 6, 6, 6, 6, 6, 6, 6, 6, 6
},
new List <int> {
7, 7, 7, 7, 7, 7, 7, 7, 7, 7
}
},
fittest.Select(f => f.Code).ToList());
}
public void WhenSelectorIsRequested_Custom_NotSet_SelectorNotAvailableExceptionShouldBeThrown()
{
Selector selector = SelectionProvider.GetSelector(SelectionType.Custom);
Assert.AreEqual(SelectionType.Custom, selector.SelectionMethod);
}
public void WhenSelectorIsRequested_Roulette_CorrectSelectorShouldBeReturned()
{
Selector selector = SelectionProvider.GetSelector(SelectionType.Roulette);
Assert.AreEqual(SelectionType.Roulette, selector.SelectionMethod);
}
public void WhenSelectorIsRequested_Truncation_CorrectSelectorShouldBeReturned()
{
Selector selector = SelectionProvider.GetSelector(SelectionType.Truncation);
Assert.AreEqual(SelectionType.Truncation, selector.SelectionMethod);
}