public void TestCloneToString()
{
List <object> l = new List <object>();
l.Add("a");
l.Add("b");
Assert.AreEqual("[]", LazyList.ToString(LazyList.Clone(null)));
Assert.AreEqual("[a]", LazyList.ToString(LazyList.Clone("a")));
Assert.AreEqual("[a, b]", LazyList.ToString(LazyList.Clone(l)));
}