public void SplayTree_StressTest()
{
var nodeCount = 1000 * 10;
var rnd = new Random();
var randomNumbers = Enumerable.Range(1, nodeCount)
.OrderBy(x => rnd.Next())
.ToList();
var tree = new SplayTree <int>();
for (int i = 0; i < nodeCount; i++)
{
tree.Insert(randomNumbers[i]);
Assert.IsTrue(tree.Count == i + 1);
}
//shuffle again before deletion tests
randomNumbers = Enumerable.Range(1, nodeCount)
.OrderBy(x => rnd.Next())
.ToList();
for (int i = 0; i < nodeCount; i++)
{
tree.Delete(randomNumbers[i]);
Assert.IsTrue(tree.Count == nodeCount - 1 - i);
}
Assert.IsTrue(tree.Count == 0);
}
public void SplayTree_Accuracy_Test()
{
var nodeCount = 1000;
var rnd = new Random();
var sorted = Enumerable.Range(1, nodeCount).ToList();
var randomNumbers = sorted
.OrderBy(x => rnd.Next())
.ToList();
var tree = new SplayTree <int>();
for (int i = 0; i < nodeCount; i++)
{
tree.Insert(randomNumbers[i]);
tree.Root.VerifyCount();
Assert.IsTrue(tree.Count == i + 1);
}
for (int i = 0; i < sorted.Count; i++)
{
Assert.AreEqual(sorted[i], tree.ElementAt(i));
Assert.AreEqual(i, tree.IndexOf(sorted[i]));
}
//shuffle again before deletion tests
randomNumbers = Enumerable.Range(1, nodeCount)
.OrderBy(x => rnd.Next())
.ToList();
//IEnumerable test using linq
Assert.AreEqual(tree.Count, tree.Count());
Assert.AreEqual(tree.Count, tree.AsEnumerableDesc().Count());
for (int i = 0; i < nodeCount; i++)
{
if (rnd.NextDouble() >= 0.5)
{
tree.Delete(randomNumbers[i]);
}
else
{
var index = tree.IndexOf(randomNumbers[i]);
Assert.AreEqual(tree.ElementAt(index), randomNumbers[i]);
tree.RemoveAt(index);
}
tree.Root.VerifyCount();
Assert.IsTrue(tree.Count == nodeCount - 1 - i);
}
Assert.IsTrue(tree.Count == 0);
}
public void SumOutOfRanfe_Test(int left, int right)
{
BinarySearchTreeNode root = null;
root = SplayTree.Delete(40, root);
root = SplayTree.Delete(35, root);
root = SplayTree.Delete(30, root);
root = SplayTree.Delete(25, root);
root = SplayTree.Delete(20, root);
root = SplayTree.Delete(15, root);
Assert.IsNull(root);
}
public void DeleteTest()
{
IEnumerable <long> preOrderList = new List <long>()
{
5, -1, 23, 17, 10, -1, 15, -1, -1, 21, 20,
-1, -1, -1, 35, 30, 25, -1, -1, -1, -1
};
var root = BST.ParseBST(ref preOrderList);
var st = new SplayTree(root);
Assert.AreEqual("5(-,23(17(10(-,15),21(20,-)),35(30(25,-),-)))", st.ToString());
st.Delete(25);
Assert.AreEqual("30(23(5(-,17(10(-,15),21(20,-))),-),35)", st.ToString());
st.Delete(15);
Assert.AreEqual("17(10(5,-),30(23(21(20,-),-),35))", st.ToString());
st.Delete(12);
Assert.AreEqual("17(10(5,-),30(23(21(20,-),-),35))", st.ToString());
}
public void Delete_AllFromBottom_Test()
{
var c = new Context();
c.N40.Left = c.N35;
c.N35.Left = c.N30;
c.N30.Left = c.N25;
c.N25.Left = c.N20;
c.N20.Left = c.N15;
var root = c.N40;
root = SplayTree.Delete(15, root);
root = SplayTree.Delete(20, root);
root = SplayTree.Delete(25, root);
root = SplayTree.Delete(30, root);
root = SplayTree.Delete(35, root);
root = SplayTree.Delete(40, root);
Assert.IsNull(root);
}
public void SplayTree_BulkInit_Test()
{
var nodeCount = 1000;
var rnd = new Random();
var sortedNumbers = Enumerable.Range(1, nodeCount).ToList();
var tree = new SplayTree <int>(sortedNumbers);
Assert.IsTrue(tree.Root.IsBinarySearchTree(int.MinValue, int.MaxValue));
Assert.AreEqual(tree.Count, tree.Count());
tree.Root.VerifyCount();
for (int i = 0; i < nodeCount; i++)
{
Assert.IsTrue(tree.Root.IsBinarySearchTree(int.MinValue, int.MaxValue));
tree.Delete(sortedNumbers[i]);
Assert.IsTrue(tree.Count == nodeCount - 1 - i);
}
Assert.IsTrue(tree.Count == 0);
}
public void SplayTree_Smoke_Test()
{
//insert test
var tree = new SplayTree <int>();
tree.Insert(11);
tree.Insert(6);
tree.Insert(8);
tree.Insert(19);
tree.Insert(4);
tree.Insert(10);
tree.Insert(5);
tree.Insert(17);
tree.Insert(43);
tree.Insert(49);
tree.Insert(31);
//delete
tree.Delete(43);
tree.Delete(11);
tree.Delete(6);
tree.Delete(8);
tree.Delete(19);
tree.Delete(4);
tree.Delete(10);
tree.Delete(5);
tree.Delete(17);
tree.Delete(49);
tree.Delete(31);
Assert.AreEqual(tree.Count, 0);
tree.Insert(31);
}
public void TestAllOperationsOnRandomNumbers()
{
int count = 100000; //MIN IS 100
List <int> numbers = new List <int>(count);
List <int> removed = new List <int>(count);
SplayTree <int> tree = new SplayTree <int>();
Random random = new Random();
int addCount = 0, succAddCount = 0,
findCount = 0, succFindCount = 0,
deleteCount = 0, succDeleteCount = 0,
compareCheck = 0;
for (int i = 0; i < count; i++)
{
int number = random.Next(0, 100 * count);
if (number % 3 == 0)
{
addCount++;
if (tree.Add(number))
{
succAddCount++;
numbers.Add(number);
if (removed.Contains(number))
{
removed.Remove(number);
}
}
}
else
if (number % 3 == 1)
{
findCount++;
if (numbers.Count > 0)
{
Assert.IsTrue(tree.Contains(numbers[random.Next(0, numbers.Count)]));
//COULD BE CHANGED TO PROFIT FROM SPLAY
succFindCount++;
}
if (removed.Count > 0)
{
Assert.IsFalse(tree.Contains(removed[random.Next(0, removed.Count)]));
}
}
else
if (number % 3 == 2)
{
deleteCount++;
if (numbers.Count > 0)
{
int toDelete = numbers[random.Next(0, numbers.Count)];
tree.Delete(toDelete);
succDeleteCount++;
numbers.Remove(toDelete);
removed.Add(toDelete);
}
if (removed.Count > 0)
{
tree.Delete(removed[random.Next(0, removed.Count)]); // SHOULD DO NOTHING
}
}
if (number % (count / 100) == 0)
{
compareCheck++;
foreach (int num in numbers)
{
Assert.IsTrue(tree.Contains(num));
}
foreach (int num in removed)
{
Assert.IsFalse(tree.Contains(num));
}
Assert.IsTrue(tree.CheckTreeStructure());
}
}
String treeTraversalLevelOrder = tree.TraverseLevelOrder();
File.WriteAllText("D:\\.NET Projects\\PlaneDepartureTracking\\PlaneDepartureTrackingMSTest\\splaytreeTestLevelOrder.txt",
treeTraversalLevelOrder);
String treeTraversalInOrder = tree.TraverseInOrder();
File.WriteAllText("D:\\.NET Projects\\PlaneDepartureTracking\\PlaneDepartureTrackingMSTest\\splaytreeTestInOrder.txt",
treeTraversalInOrder);
String checkInfo = "ADD checks: " + addCount + "\r\nSuccessfully added elements: " + succAddCount +
"\r\nFIND checks: " + findCount + "\r\nSuccessfully found elements: " + succFindCount +
"\r\nDELETE checks: " + deleteCount + "\r\nSuccessfully deleted elements: " + succDeleteCount +
"\r\nTree-List comparisons: " + compareCheck;
File.WriteAllText("D:\\.NET Projects\\PlaneDepartureTracking\\PlaneDepartureTrackingMSTest\\splaytreeTestStats.txt",
checkInfo);
}