public void UnwindTest()
        {
            const String KEY1 = "key1";
            const String KEY2 = "key2";
            const String KEY3 = "key3";
            const String KEY4 = "key4";

            IList<String> expected = new List<String>();
            expected.Add(KEY1);
            expected.Add(KEY2);
            expected.Add(KEY3);
            expected.Add(KEY4);

            StretchrRequest<String> target = new StretchrRequest<String>(new StretchrClient(), response => { }, (request, statusCode, exception) => { });
            target.Unwind(KEY1, KEY2, KEY3, KEY4);

            IList<String> actual = target.AggregationFunctionParameterListUnwind;

            Assert.IsNotNull(actual);
            Assert.AreEqual(expected.Count, actual.Count);
            Assert.AreEqual(expected[0], actual[0]);
            Assert.AreEqual(expected[1], actual[1]);
            Assert.AreEqual(expected[2], actual[2]);
            Assert.AreEqual(expected[3], actual[3]);
        }