public void ValidateBillToId_WhenBillToIdIsOver100Characters_ReturnBillToIdExceedsMaximumLengthMsg()
        {
            string billToId = new string('A', 101);
            string msg      = BMPresenter.ValidateBillToId(billToId);

            Assert.That(msg, Is.EqualTo("The length of BillToID can't be over 100 characters!"));
        }
        public void ValidateBillToId_WhenBillToIdIsValidated_ReturnEmptythMsg()
        {
            string billToId = new string('A', 99);
            string msg      = BMPresenter.ValidateBillToId(billToId);

            Assert.That(msg, Is.EqualTo(string.Empty));
        }
        public void ValidateBillToId_WhenBillToIdIsEmptyOrNull_ReturnBillToIdEmptyMsg(string billToId)
        {
            string msg = BMPresenter.ValidateBillToId(billToId);

            Assert.That(msg, Is.EqualTo("BillToID can't be empty!"));
        }