public void TestAddCollection()
{
List <object> l = new List <object>();
l.Add("a");
l.Add("b");
object list = null;
list = LazyList.AddCollection(list, l);
list = LazyList.AddCollection(list, l);
Assert.AreEqual(4, LazyList.Size(list));
Assert.AreEqual("a", LazyList.Get(list, 0));
Assert.AreEqual("b", LazyList.Get(list, 1));
Assert.AreEqual("a", LazyList.Get(list, 2));
Assert.AreEqual("b", LazyList.Get(list, 3));
}