AWSSDK.UnitTests.LruListTest.AssertListState C# (CSharp) Method

        private void AssertListState(LruList<string, string> lruList, params LruListItem<string, string>[] items)
        {
            if (items.Length == 0)
            {
                Assert.IsNull(lruList.Head);
                Assert.IsNull(lruList.Tail);
            }
            else
            {
                // check references on ends
                Assert.IsNull(lruList.Head.Previous);
                Assert.IsNull(lruList.Tail.Next);

                // make sure head and tail are correct
                Assert.AreEqual(items[0], lruList.Head);
                Assert.AreEqual(items[items.Length - 1], lruList.Tail);

                // make sure Next references are in the expected order
                for (int i = 0; i < items.Length - 1; i++)
                {
                    Assert.AreEqual(items[i].Next, items[i + 1]);
                }

                // make sure Previous references are in the expected order
                for (int i = items.Length - 1; i > 0; i--)
                {
                    Assert.AreEqual(items[i].Previous, items[i - 1]);
                }
            }
        }