public void Operate_OneMutationDesired_ReturnsMutatedDv()
{
var mutator = new MutationAddRandomInteger(
-1, 1, false,
1, 1);
var newDv = mutator.Operate(testDv);
Assert.NotEqual(testDv, newDv);
Assert.Equal(testDv.Count, newDv.Count);
var changedValue = newDv.Where((v, i) => (double)v != (double)testDv.ElementAt(i)).Select(d => (double)d);
Assert.True(changedValue.Count() == 1);
var oldValue = testDv.Where((v, i) => (double)v != (double)newDv.ElementAt(i)).Select(d => (double)d);
Assert.Equal(1, Math.Abs(oldValue.First() - changedValue.First()));
}
public void Operate_OneMutationDesired_ReturnsMutatedDv()
{
var mutator = new MutationAddRandomNumberFromSet(
new[] { 2.0 },
1, 1);
var newDv = mutator.Operate(testDv);
Assert.NotEqual(testDv, newDv);
Assert.Equal(testDv.Count, newDv.Count);
var changedValue = newDv.Where((v, i) => (double)v != (double)testDv.ElementAt(i)).Select(d => (double)d);
Assert.True(changedValue.Count() == 1);
var oldValue = testDv.Where((v, i) => (double)v != (double)newDv.ElementAt(i)).Select(d => (double)d);
Assert.True(Math.Abs(oldValue.First() - changedValue.First()) - 2.0 < 1e-6);
}
public void Operate_AllConditionsPassed_OneMutationDesired_ReturnsMutatedDv()
{
var mutator = new MutationConditional(
insideMutation,
o => Convert.ToDouble(o) >= double.MinValue);
var newDv = mutator.Operate(testDv);
Assert.NotEqual(testDv, newDv);
Assert.Equal(testDv.Count, newDv.Count);
var changedValue = newDv.Where((v, i) => (double)v != (double)testDv.ElementAt(i)).Select(d => (double)d);
Assert.True(changedValue.Count() == 1);
var oldValue = testDv.Where((v, i) => (double)v != (double)newDv.ElementAt(i)).Select(d => (double)d);
Assert.True(Math.Abs(Math.Abs(oldValue.First() - changedValue.First()) - mutation) < 1e-8);
}
/// <summary>
/// Gets a new Decision Vector where elements which pass the conditions have potentially been mutated.
/// </summary>
/// <param name="decisionVector"><see cref="DecisionVector"/> to mutate.</param>
/// <returns>A mutated Decision Vector.</returns>
public DecisionVector Operate(DecisionVector decisionVector)
{
var elementsToMutate = decisionVector.Select(e => conditions.All(c => c(e)));
var tempDs = new DecisionSpace(decisionVector.GetDecisionSpace().Where((d, i) => elementsToMutate.ElementAt(i)));
var tempDv = DecisionVector.CreateFromArray(tempDs, decisionVector.Where((e, i) => elementsToMutate.ElementAt(i)));
var newElements = mutation.Operate(tempDv);
var newVector = decisionVector.ToArray();
var item = 0;
for (var i = 0; i < newVector.Length; i++)
{
if (elementsToMutate.ElementAt(i))
{
newVector[i] = newElements.ElementAt(item);
item++;
}
}
return(DecisionVector.CreateFromArray(decisionVector.GetDecisionSpace(), newVector));
}