public void AddTest()
{
var heap = new BinomialHeap();
heap.Add(7);
heap.Add(5);
heap.Add(4);
heap.Add(8);
const int expectedCount = 4;
Assert.IsTrue(heap.Count == expectedCount, "Incorrect number of items added");
}
public void RemoveTest()
{
var heap = new BinomialHeap();
heap.Add(7);
heap.Add(5);
heap.Add(4);
heap.Add(8);
heap.Remove(4);
const int expectedCount = 3;
Assert.IsTrue(heap.Count == expectedCount, "Incorrect number of items after deletion");
}
public void ExtractMinTest()
{
var heap = new BinomialHeap();
heap.Add(7);
heap.Add(5);
heap.Add(4);
heap.Add(8);
heap.TryExtractMin(out var min);
const int expectedMin = 4;
Assert.IsTrue(min == expectedMin, "Extracted the wrong item");
}
public static void TestBinomialHeapCreation()
{
var heap = new BinomialHeap();
heap.Add(2);
Assert.AreEqual(heap.Roots.Count, 1);
heap.Add(3);
Assert.AreEqual(heap.Roots.Count, 1);
heap.Add(1);
Assert.AreEqual(heap.Roots.Count, 2);
heap.Add(4);
Assert.AreEqual(heap.Roots.Count, 1);
heap.Add(2);
Assert.AreEqual(heap.Roots.Count, 2);
heap.Add(5);
Assert.AreEqual(heap.Roots.Count, 2);
heap.Add(6);
Assert.AreEqual(heap.Roots.Count, 3);
heap.Add(7);
Assert.AreEqual(heap.Roots.Count, 1);
Assert.IsNotNull(heap.Roots[3]);
var max = heap.GetMaximum();
Assert.AreEqual(max, 7);
}
public void DecreaseKeyTest()
{
const int newMinKey = 2;
var heap = new BinomialHeap();
heap.Add(7);
heap.Add(5);
heap.Add(4);
heap.Add(8);
heap.DecreaseKey(4, newMinKey);
heap.TryExtractMin(out var min);
Assert.IsTrue(min == newMinKey, "The specified key has not changed");
}
