public void FindLargestBelowTest()
{
tree = new SplayTree <int> {
5, 11, 8, 13, 3, 7, 12
};
Assert.AreEqual(8, tree.LargestBelow(10));
}
public void FindSmallestAboveTest()
{
tree = new SplayTree <int> {
5, 11, 8, 13, 3, 7, 12
};
Assert.AreEqual(11, tree.SmallestAbove(8));
}
public void RemoveFailTest()
{
tree = new SplayTree <int> {
77, 85, 66, 56, 74, 94, 27, 61, 48, 57
};
Assert.IsFalse(tree.Remove(34));
}
public void FindSmallestAboveTestFail()
{
tree = new SplayTree <int> {
5, 11, 8, 13, 3, 7, 12
};
tree.SmallestAbove(13);
}
public void WeissTest()
{
tree = new SplayTree <int>();
const int NUMS = 40000;
const int GAP = 307;
for (int i = GAP; i != 0; i = (i + GAP) % NUMS)
{
tree.Add(i);
}
for (int i = 1; i < NUMS; i += 2)
{
tree.Remove(i);
}
Assert.AreEqual(2, tree.Minimum);
Assert.AreEqual(NUMS - 2, tree.Maximum);
for (int i = 2; i < NUMS; i += 2)
{
Assert.IsTrue(tree.Contains(i));
}
for (int i = 1; i < NUMS; i += 2)
{
Assert.IsFalse(tree.Contains(i));
}
}
public void EnumerationEmptyTest()
{
tree = new SplayTree <int>();
IEnumerator <int> e = tree.GetEnumerator();
Assert.IsFalse(e.MoveNext());
}
public void FindLargestBelowTestFail()
{
tree = new SplayTree <int> {
5, 11, 8, 13, 3, 7, 12
};
tree.LargestBelow(3);
}
/// <summary>
/// Merge two splay trees, assumes all of the items in rhs are
/// greater than last.
/// All of the items in rhs are transferred to this, replacing all
/// elements in this tree greater than last. After the
/// operator rhs IsEmpty.
/// </summary>
/// <param name="last">The last (greatest) element of this tree that will be preserved</param>
/// <param name="rhs">The tree to be merged in</param>
/// <returns>The merged result tree</returns>
/// <exception cref="ArgumentNullException">Throws in rhs is null</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown if all elements in rhs are not greater than last.</exception>
public SplayTree <T> Merge(T last, SplayTree <T> rhs)
{
if (rhs == null)
{
throw new ArgumentNullException("rhs", "Merge attemped with null rhs SplayTree");
}
if (rhs.IsEmpty)
{
return(this);
}
if (comparer.Compare(last, rhs.Minimum) > 0)
{
throw new ArgumentOutOfRangeException("rhs", rhs, "All elements in the rhs SplayTree must be greater than last.");
}
Debug.Assert(comparer.Compare(last, rhs.Minimum) <= 0);
if (IsEmpty)
{
root = rhs.root;
count = rhs.count;
rhs.Clear();
return(this);
}
Contains(last);
root.right = rhs.root;
count = null; // Invalidate count
rhs.Clear();
return(this);
}
public void TryGetValueNegativeTest()
{
int[] array = new int[] { 64, 3, 16, 73, 67 };
tree = new SplayTree <int>(array);
int result;
bool success = tree.TryGetValue(15, out result);
Assert.IsFalse(success);
}
public void ClearTest()
{
int[] array = new int[] { 100, 29, 77, 59, 61 };
tree = new SplayTree <int>(array);
Assert.IsFalse(tree.IsEmpty);
tree.Clear();
Assert.IsTrue(tree.IsEmpty);
Assert.AreEqual(0, tree.Count);
}
public void TryGetValuePositiveTest()
{
int[] array = new int[] { 64, 3, 16, 73, 67 };
tree = new SplayTree <int>(array);
int result;
bool success = tree.TryGetValue(16, out result);
Assert.IsTrue(success);
Assert.AreEqual(16, result);
}
public void ConstructFromEnumerable()
{
int[] array = new int[] { 41, 92, 71, 12, 20 };
tree = new SplayTree <int>(array);
Assert.AreEqual(array.Length, tree.Count);
foreach (int item in array)
{
Assert.IsTrue(tree.Contains(item));
}
}
public void RootTest()
{
tree = new SplayTree <int> {
5, 3, 7
};
Assert.IsTrue(tree.Contains(5));
Assert.AreEqual(5, tree.Root);
Assert.AreEqual(7, tree.Right);
Assert.AreEqual(3, tree.Minimum);
Assert.AreEqual(7, tree.Maximum);
}
public void CountTest()
{
tree = new SplayTree <int>();
tree.Add(5);
Assert.AreEqual(1, tree.Count);
tree.Add(3);
Assert.AreEqual(2, tree.Count);
tree.Remove(5);
Assert.AreEqual(1, tree.Count);
tree.Add(7);
Assert.AreEqual(2, tree.Count);
tree.Add(9);
Assert.AreEqual(3, tree.Count);
tree.Add(5);
Assert.AreEqual(4, tree.Count);
tree.Remove(7);
Assert.AreEqual(3, tree.Count);
}
public void EnumerationTest()
{
int[] array = new int[] { 64, 3, 16, 73, 67 };
tree = new SplayTree <int>(array);
IEnumerator <int> e = tree.GetEnumerator();
Assert.IsTrue(e.MoveNext());
Assert.AreEqual(3, e.Current);
Assert.IsTrue(e.MoveNext());
Assert.AreEqual(16, e.Current);
Assert.IsTrue(e.MoveNext());
Assert.AreEqual(64, e.Current);
Assert.IsTrue(e.MoveNext());
Assert.AreEqual(67, e.Current);
Assert.IsTrue(e.MoveNext());
Assert.AreEqual(73, e.Current);
Assert.IsFalse(e.MoveNext());
}
public void SplitKeepTest()
{
tree = new SplayTree <int> {
5, 11, 8, 13, 3, 7, 12
};
SplayTree <int> leftover = tree.SplitAt(11, true);
Assert.AreEqual(5, tree.Count);
Assert.AreEqual(2, leftover.Count);
Assert.IsTrue(tree.Contains(3));
Assert.IsTrue(tree.Contains(5));
Assert.IsTrue(tree.Contains(7));
Assert.IsTrue(tree.Contains(8));
Assert.IsTrue(tree.Contains(11));
Assert.IsFalse(tree.Contains(12));
Assert.IsFalse(tree.Contains(13));
Assert.IsTrue(leftover.Contains(12));
Assert.IsTrue(leftover.Contains(13));
}
public void MergeTest()
{
tree = new SplayTree <int> {
5, 3, 7, 12
};
SplayTree <int> tree2 = new SplayTree <int> {
11, 8, 13
};
tree.Merge(7, tree2);
Assert.AreEqual(6, tree.Count);
Assert.AreEqual(0, tree2.Count);
Assert.IsTrue(tree.Contains(3));
Assert.IsTrue(tree.Contains(5));
Assert.IsTrue(tree.Contains(7));
Assert.IsTrue(tree.Contains(8));
Assert.IsTrue(tree.Contains(11));
Assert.IsFalse(tree.Contains(12));
Assert.IsTrue(tree.Contains(13));
}
/// <summary>
/// Split the splay tree into to at the given value. Elements less than value
/// will remain in this tree, elements greater than value will be in the returned tree.
/// </summary>
/// <param name="value">The value at which the split is to be made.</param>
/// <param name="keep">Controls whether elements equal to value are remain in this tree (true)
/// or are moved to the returned tree (false).</param>
/// <returns></returns>
public SplayTree <T> SplitAt(T value, bool keep)
{
SplayTree <T> leftover = new SplayTree <T>();
Contains(value);
int comp = comparer.Compare(value, root.element);
if (comp > 0 || comp == 0 && keep)
{
leftover.root = root.right;
root.right = nullNode;
}
else
{
leftover.root = root;
root = root.left;
leftover.root.left = nullNode;
}
count = null; // Invalidate count
leftover.count = null; // Invalidate count
return(leftover);
}
public SplayDictionary(IComparer <K> comparer)
{
var keyComparer = new KeyComparer <K, V>(comparer);
tree = new SplayTree <KeyValuePair <K, V> >(keyComparer);
}
public void MaximumFailTest()
{
tree = new SplayTree <int>();
int dummy = tree.Maximum;
}
public void EmptinessTest()
{
tree = new SplayTree <int>();
tree.Add(42);
Assert.IsFalse(tree.IsEmpty);
}
public void DefaultConstructor()
{
tree = new SplayTree <int>();
Assert.IsTrue(tree.IsEmpty);
Assert.AreEqual(0, tree.Count);
}