public void TestMultiplication_CurrentDate()
        {
            ComplexField addition = new Addition();
            Field        operand1 = new SpecialField("operand1", "CurrentDate");
            Field        operand2 = new LiteralField("Int32", "operand2", "-4");
            Field        operand3 = new LiteralField("Decimal", "operand3", "-1");

            addition.AddField(operand1).AddField(operand2).AddField(operand3);

            DateTime additionResult = (DateTime)addition.GetValue(null);
            DateTime expected       = DateTime.Now.Date.AddDays(-5);

            Assert.AreEqual <DateTime>(expected, additionResult);
        }