public void ErrorCases()
{
var distanceNegative = NodesAtKDistanceFromRootFinder.Find(_tree, -1);
Assert.AreEqual(0, distanceNegative.Count);
BTreeNode nullTree = null;
var distanceNull = NodesAtKDistanceFromRootFinder.Find(nullTree, 2);
Assert.AreEqual(0, distanceNull.Count);
}
public void PositiveCases()
{
var distance0 = NodesAtKDistanceFromRootFinder.Find(_tree, 0);
Assert.AreEqual(1, distance0.Count);
Assert.AreEqual(1, distance0[0].Data);
var distance1 = NodesAtKDistanceFromRootFinder.Find(_tree, 1);
Assert.AreEqual(2, distance1.Count);
Assert.AreEqual(2, distance1[0].Data);
Assert.AreEqual(3, distance1[1].Data);
var distance2 = NodesAtKDistanceFromRootFinder.Find(_tree, 2);
Assert.AreEqual(3, distance2.Count);
Assert.AreEqual(4, distance2[0].Data);
Assert.AreEqual(5, distance2[1].Data);
Assert.AreEqual(8, distance2[2].Data);
}
