public void SuccessfullyReturnWithDefaultValues()
        {
            var function = new AddDaysFunction();

            var inputs = function.GetInputs();

            Assert.Equal(2, inputs.Length);

            var result = function.Calculate(inputs);

            Assert.Collection(result,
                              i =>
            {
                Assert.Equal(typeof(double), i.Value.GetType());
                Assert.Equal(Math.IEEERemainder(0.0, 1.0), TypeConverter.ToObject <double>(i.Value));
            });
        }