public void LinkageTreeTestAdd()
{
MersenneTwister rand = new MersenneTwister();
LinkageTree tree = new LinkageTree(Length, rand);
tree.Add(solutions[0]);
tree.Add(solutions[1]);
PrivateObject hidden = new PrivateObject(tree);
int[][][] result = (int[][][])hidden.GetField("occurances");
Assert.AreEqual(1, result[1][0][0]); // Positions 0 and 1 had value 00 exactly once
Assert.AreEqual(2, result[Length - 1][Length - 2][0]); // Positions 0 and 1 had value 00 exactly once
Assert.AreEqual(0, result[Length - 1][Length - 2][1]); // Positions 7 and 8 never had value 10
Assert.AreEqual(1, result[1][0][3]); // Positions 0 and 1 had value 11 exactly once
}
public void LinkageTreeTestRebuild()
{
// The seed matters as equal sized clusters can appear in any order
MersenneTwister rand = new MersenneTwister(123);
LinkageTree tree = new LinkageTree(Length, rand);
foreach (var solution in solutions)
{
tree.Add(solution);
}
// Check if the clusters created contain the expected variables.
var found = tree.Clusters.ToArray();
Assert.AreEqual(correctClusters.Length, found.Length);
for (int i = 0; i < found.Length; i++)
{
found[i].Sort();
Assert.IsTrue(found[i].SequenceEqual(correctClusters[i]), string.Format("Failed On Cluster {0}", i));
}
}
public void LinkageTreeTestEntropyDistance()
{
MersenneTwister rand = new MersenneTwister();
LinkageTree tree = new LinkageTree(Length, rand);
PrivateObject hidden = new PrivateObject(tree);
// No information should result in a distance of 0
Assert.AreEqual((double)0, hidden.Invoke("EntropyDistance", new object[] { 0, 1 }));
foreach (var solution in solutions)
{
tree.Add(solution);
}
// Check that 0 and 1 are closer than 0 and 2
var linked = (double)hidden.Invoke("EntropyDistance", new object[] { 0, 1 });
var unlinked = (double)hidden.Invoke("EntropyDistance", new object[] { 0, 2 });
Assert.IsTrue(linked < unlinked);
// Reversing the arguments should not change the result
var forward = hidden.Invoke("EntropyDistance", new object[] { Length - 1, Length - 2 });
var backward = hidden.Invoke("EntropyDistance", new object[] { Length - 2, Length - 1 });
Assert.AreEqual(forward, backward);
}