public void TestAddCyclicConnection()
{
var pop = CreateNeatPopulation();
var genomeBuilder = NeatGenomeBuilderFactory <double> .Create(pop.MetaNeatGenome);
var genome = pop.GenomeList[0];
var strategy = new AddCyclicConnectionStrategy <double>(
pop.MetaNeatGenome, genomeBuilder,
pop.GenomeIdSeq, pop.InnovationIdSeq, pop.GenerationSeq,
RandomDefaults.CreateRandomSource());
var nodeIdSet = GetNodeIdSet(genome);
var connSet = GetDirectedConnectionSet(genome);
for (int i = 0; i < 1000; i++)
{
var childGenome = strategy.CreateChildGenome(genome);
// The child genome should have one more connection than parent.
Assert.AreEqual(genome.ConnectionGenes.Length + 1, childGenome.ConnectionGenes.Length);
// The child genome's new connection should not be a duplicate of any of the existing/parent connections.
var childConnSet = GetDirectedConnectionSet(childGenome);
var newConnList = new List <DirectedConnection>(childConnSet.Except(connSet));
Assert.AreEqual(1, newConnList.Count);
// The connection genes should be sorted.
Assert.IsTrue(SortUtils.IsSortedAscending(childGenome.ConnectionGenes._connArr));
// The child genome should have the same set of node IDs as the parent.
var childNodeIdSet = GetNodeIdSet(childGenome);
Assert.IsTrue(nodeIdSet.SetEquals(childNodeIdSet));
}
}
public void AddCyclicConnection()
{
var pop = CreateNeatPopulation();
var generationSeq = new Int32Sequence();
var genomeBuilder = NeatGenomeBuilderFactory <double> .Create(pop.MetaNeatGenome);
var genome = pop.GenomeList[0];
var strategy = new AddCyclicConnectionStrategy <double>(
pop.MetaNeatGenome, genomeBuilder,
pop.GenomeIdSeq, generationSeq);
IRandomSource rng = RandomDefaults.CreateRandomSource();
var nodeIdSet = GetNodeIdSet(genome);
var connSet = GetDirectedConnectionSet(genome);
const int loops = 1000;
int nullResponseCount = 0;
for (int i = 0; i < loops; i++)
{
var childGenome = strategy.CreateChildGenome(genome, rng);
// The strategy may return null if no appropriately connection could be found to add.
if (childGenome is null)
{
nullResponseCount++;
continue;
}
// The child genome should have one more connection than parent.
Assert.Equal(genome.ConnectionGenes.Length + 1, childGenome.ConnectionGenes.Length);
// The child genome's new connection should not be a duplicate of any of the existing/parent connections.
var childConnSet = GetDirectedConnectionSet(childGenome);
var newConnList = new List <DirectedConnection>(childConnSet.Except(connSet));
Assert.Single(newConnList);
// The connection genes should be sorted.
Assert.True(SortUtils.IsSortedAscending <DirectedConnection>(childGenome.ConnectionGenes._connArr));
// The child genome should have the same set of node IDs as the parent.
var childNodeIdSet = GetNodeIdSet(childGenome);
Assert.True(nodeIdSet.SetEquals(childNodeIdSet));
}
// nullResponseProportion will typically be 0, with 1.0% being so unlikely
// it probably will never be observed.
double nullResponseProportion = nullResponseCount / (double)loops;
Assert.True(nullResponseProportion <= 0.01);
}