public void PairingMinHeap_Test()
{
int nodeCount = 1000 * 10;
//insert test
var tree = new PairingMinHeap <int>();
for (int i = 0; i <= nodeCount; i++)
{
tree.Insert(i);
}
for (int i = 0; i <= nodeCount; i++)
{
tree.DecrementKey(i, i - 1);
}
int min = 0;
for (int i = 0; i <= nodeCount; i++)
{
min = tree.ExtractMin();
Assert.AreEqual(min, i - 1);
}
//IEnumerable tests.
Assert.AreEqual(tree.Count, tree.Count());
var rnd = new Random();
var testSeries = Enumerable.Range(0, nodeCount - 1).OrderBy(x => rnd.Next()).ToList();
foreach (var item in testSeries)
{
tree.Insert(item);
}
for (int i = 0; i < testSeries.Count; i++)
{
var decremented = testSeries[i] - rnd.Next(0, 1000);
tree.DecrementKey(testSeries[i], decremented);
testSeries[i] = decremented;
}
testSeries.Sort();
for (int i = 0; i < nodeCount - 2; i++)
{
min = tree.ExtractMin();
Assert.AreEqual(testSeries[i], min);
}
//IEnumerable tests.
Assert.AreEqual(tree.Count, tree.Count());
}
public void PairingMinHeap_Test()
{
int nodeCount = 1000 * 10;
//insert test
var tree = new PairingMinHeap <int>();
var nodePointers = new List <PairingHeapNode <int> >();
for (int i = 0; i <= nodeCount; i++)
{
var node = tree.Insert(i);
nodePointers.Add(node);
}
for (int i = 0; i <= nodeCount; i++)
{
nodePointers[i].Value--;
tree.DecrementKey(nodePointers[i]);
}
int min = 0;
for (int i = 0; i <= nodeCount; i++)
{
min = tree.ExtractMin();
Assert.AreEqual(min, i - 1);
}
nodePointers.Clear();
var rnd = new Random();
var testSeries = Enumerable.Range(0, nodeCount - 1).OrderBy(x => rnd.Next()).ToList();
foreach (var item in testSeries)
{
nodePointers.Add(tree.Insert(item));
}
min = tree.ExtractMin();
nodePointers = nodePointers.Where(x => x.Value != min).ToList();
var resultSeries = new List <int>();
for (int i = 0; i < nodePointers.Count; i++)
{
nodePointers[i].Value = nodePointers[i].Value - rnd.Next(0, 1000);
tree.DecrementKey(nodePointers[i]);
}
foreach (var item in nodePointers)
{
resultSeries.Add(item.Value);
}
resultSeries.Sort();
for (int i = 0; i < nodeCount - 2; i++)
{
min = tree.ExtractMin();
Assert.AreEqual(resultSeries[i], min);
}
}