public void AddArrayToBeginningTest(int[] array, int[] arraychik, int[] expArray)
        {
            DoubleLinkedList expected = new DoubleLinkedList(expArray);
            DoubleLinkedList actual   = new DoubleLinkedList(array);

            actual.AddArrayToBeginning(arraychik);

            Assert.AreEqual(expected, actual);
        }