public void Clone_123_Equals123()
{
SingleLinkedList <int> list = new SingleLinkedList <int>();
list.InsertAtEnd(1);
list.InsertAtEnd(2);
list.InsertAtEnd(3);
var copy = list.Clone();
int[] numbers = list.ToArray();
int[] copyNumbers = copy.ToArray();
Assert.AreEqual(numbers, copyNumbers);
}
