public void TestUpperCaseSeperator()
        {
            var stringList = new List <string>
            {
                "lower case",
                "UPPERCASE",
                "Mixed Case"
            };

            var upperCaseStrings = GreetingKata.SeperateUpperCaseText(ref stringList);

            Assert.AreEqual(1, upperCaseStrings.Count);
            Assert.AreEqual(2, stringList.Count);
        }