public void RemoveRangeByRank()
{
for (var _ = 0; _ < 100; _++)
{
var list = new SortSet <int, int>();
for (var i = 0; i < 10; i++)
{
list.Add(i, i);
}
list.RemoveRangeByRank(3, 8);
Assert.AreEqual(0, list.GetElementByRank(0));
Assert.AreEqual(1, list.GetElementByRank(1));
Assert.AreEqual(2, list.GetElementByRank(2));
Assert.AreEqual(9, list.GetElementByRank(3));
for (var i = 3; i < 9; i++)
{
list.Add(i, i);
}
list.Add(33, 3);
list.RemoveRangeByRank(3, 3);
Assert.AreEqual(0, list.GetElementByRank(0));
Assert.AreEqual(1, list.GetElementByRank(1));
Assert.AreEqual(2, list.GetElementByRank(2));
var r = list.GetElementByRank(3);
Assert.AreEqual(true, r == 3 || r == 33);
}
}