public static Func <IReadOnlyList <T>, IReadOnlyList <T> > StandardMutator <T>
(
double deletionRate,
double insertionRate,
double mutationRate,
Func <T> geneMutator,
IRando rando
)
{
return(list =>
{
var lp = new ListPropigator <T>
(
deletor: (l, i) => l.RemoveAt(i),
deletionFrequency: deletionRate,
inserter: (l, i) => l.Insert(i, geneMutator.Invoke()),
insertionFrequency: insertionRate,
mutator: (l, i) => l.SetItem(i, geneMutator.Invoke()),
mutationFrequency: mutationRate,
finalIndex: list.Count
);
return list.Mutate(lp, rando);
});
}
public void TestListPropigatorMutate()
{
const int startLen = 40;
const int finalLen = 40;
var lp = new ListPropigator <int>
(
deletor: Deletor,
deletionFrequency: 0.0,
inserter: Inserter,
insertionFrequency: 0.0,
mutator: Mutator,
mutationFrequency: 1.0,
finalIndex: finalLen
);
var randy = Rando.Fast(123);
var track = new Tuple <IImmutableList <int>, int>
(
ImmutableList <int> .Empty.AddRange(Enumerable.Range(0, startLen)),
0
);
while (track.Item2 < lp.FinalIndex)
{
track = lp.Propigate(track.Item1, randy, track.Item2);
}
Assert.AreEqual(track.Item1.Count, finalLen);
Assert.IsTrue(track.Item1.All(t => t == 55));
}
