[TestClass]
    public class StringHelperTest
    {
        [TestMethod]
        public void StringToArray_Value_Not_Valid_Should_Return_Exception()
        {
            var ex = Assert.ThrowsException<ArgumentException>(() => StringHelper.StringToArray(null, null));
            Assert.IsTrue(ex.Message.Contains(ErrorStrings.Value_cannot_be_null_or_empty));
        }
        [DataTestMethod]
        [DataRow(null)]
        [DataRow(new char[] { })]
        public void StringToArray_DelimitersChars_Not_Valid_Should_Return_Exception(char[] argument)
        {
            var ex = Assert.ThrowsException<ArgumentException>(() => StringHelper.StringToArray("asdf", argument));
            Assert.IsTrue(ex.Message.Contains(ErrorStrings.Value_cannot_be_null_or_empty));
        }
   }