public void Delete()
{
var heapTree = new HeapTree();
heapTree.Insert(5);
heapTree.Insert(6);
heapTree.Insert(15);
heapTree.Insert(7);
heapTree.Insert(12);
heapTree.Insert(9);
heapTree.Insert(2);
heapTree.Insert(54);
heapTree.Insert(59);
heapTree.Display();
heapTree.DeleteRoot();
heapTree.Display();
int index = heapTree.Search(54);
Assert.AreEqual(1, index);
}
