public void CalculateResultShouldReturnCorrectAmount()
        {
            // Arrange
            var sut = new InvestmentService();
            var investmentDetails = new List <InvestmentDetail>
            {
                new InvestmentDetail
                {
                    InvestmentOptionId = 1,
                    Amount             = 1000m,
                    Percentage         = 100m
                }
            };

            // Act
            var result = sut.CalculateResult(investmentDetails);

            // Assert
            Assert.AreEqual(result.InvestmentReturn, 100m);
            Assert.AreEqual(result.Fees, 0m);
        }