public void GetPreviousTest()
        {
            var inputSet = new List <int>();

            for (var i = 0; i < 6; i++)
            {
                inputSet.Add(i);
            }
            var position = 3;
            var actual   = client.GetIterator(inputSet, position).GetPrevious();
            var expected = 2;

            Assert.AreEqual(expected, actual, "{0} != {1}", expected, actual);
        }