public void Many_levels()
{
var sList = new Skiplist();
var size = 32;
for (int i = 0; i < size; i += 2)
{
sList.Add(i);
}
for (int i = 1; i < size; i += 2)
{
sList.Add(i);
}
for (int i = 0; i < size; i++)
{
Assert.True(sList.Search(i));
}
// removing every 3rd element
for (int i = 0; i < size; i += 3)
{
Assert.True(sList.Erase(i));
}
// make sure the remaining elements are there
for (int i = 0; i < size; i++)
{
if (i % 3 == 0)
{
continue;
}
Assert.True(sList.Search(i));
}
}
public void TwoLevels_Erase()
{
var list = new Skiplist();
list.Add(1);
list.Add(2);
list.Add(5);
list.Add(7);
//next add should trigger new level
list.Add(10);
list.Add(12);
//add random order
list.Add(9);
list.Add(4);
list.Add(19);
list.Add(17);
Assert.True(list.Erase(5));
Assert.False(list.Search(5));
Assert.True(list.Erase(1));
Assert.False(list.Search(1));
Assert.True(list.Search(10));
}
public void SkipList_Erases()
{
var list = new Skiplist <int>(4, 0.5);
list.Add(1);
list.Add(2);
list.Add(1);
list.Add(1);
list.Add(1);
list.Add(2);
list.Add(3);
// not in list
Assert.False(list.Erase(4));
Assert.True(list.Erase(1));
Assert.True(list.Erase(2));
Assert.True(list.Erase(1));
Assert.True(list.Erase(1));
Assert.True(list.Erase(1));
Assert.True(list.Erase(2));
Assert.True(list.Erase(3));
// list should be empty
Assert.False(list.Erase(1));
Assert.False(list.Erase(2));
Assert.False(list.Erase(3));
// not in list
Assert.False(list.Erase(4));
}
public void OneLevel()
{
var list = new Skiplist();
list.Add(1);
list.Add(5);
list.Add(10);
Assert.True(list.Search(1));
Assert.True(list.Search(5));
Assert.True(list.Search(10));
Assert.True(list.Erase(5));
Assert.False(list.Search(5));
list.Add(4);
list.Add(4);
Assert.True(list.Erase(4));
Assert.True(list.Search(4));
}
public void SkipListAddTest()
{
var skiplist = new Skiplist <int>();
skiplist.Add(5);
skiplist.Add(50);
var str = skiplist.ToString();
skiplist.Add(500);
skiplist.Add(5000);
skiplist.Add(51);
skiplist.Add(501);
Assert.AreEqual("0 5 50 51 500 501 5000 0 ", skiplist.ToString());
}
public void SkipList_Adds_Searches()
{
var list = new Skiplist <int>(4, 0.5);
list.Add(1);
list.Add(2);
list.Add(1);
list.Add(1);
list.Add(2);
list.Add(3);
Assert.True(list.Search(1));
Assert.True(list.Search(2));
Assert.True(list.Search(3));
}
public void ThrowsOnDuplicateKey()
{
var list = new Skiplist<int, int>(KeyStrategy.Unique) {{1, 1}};
Assert.Throws<DuplicateKeyException>(() => list.Add(1, 2));
}