public void CalculatePresentValue_ForFirstSecondYear_ReturnsValue()
{
var sut = new NpvCalculator();
var pv = sut.CalculatePresentValue(25, 0.10d, 2);
Assert.Equal(20.66115, pv, 4);
}
public void CalculatePresentValue_ForFirstThirdYear_ReturnsValue()
{
var sut = new NpvCalculator();
var pv = sut.CalculatePresentValue(30, 0.10d, 3);
Assert.Equal(22.53944, pv, 4);
}
public void CalculatePresentValue_ForFirstYear_ReturnsValue()
{
var sut = new NpvCalculator();
var pv = sut.CalculatePresentValue(25, 0.10d, 1);
Assert.Equal(22.72727, pv, 4);
}
public void CalculateXNpv_ForKnownMonthValues_ReturnsExpected()
{
var sut = new NpvCalculator();
var inputs = new List<Cashflow>()
{
new Cashflow() { Period = new DateTime(2014, 1, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2014, 2, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2014, 3, 1), Amount = 30 },
new Cashflow() { Period = new DateTime(2014, 4, 1), Amount = 35 },
new Cashflow() { Period = new DateTime(2014, 5, 1), Amount = 20 },
new Cashflow() { Period = new DateTime(2014, 6, 1), Amount = 15 },
new Cashflow() { Period = new DateTime(2014, 7, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2014, 8, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2014, 9, 1), Amount = 15 },
new Cashflow() { Period = new DateTime(2014, 10, 1), Amount = 15 },
new Cashflow() { Period = new DateTime(2014, 11, 1), Amount = 20 },
new Cashflow() { Period = new DateTime(2014, 12, 1), Amount = 10 },
};
var initialInvestment = 100;
var actual = sut.CalculateNpv(initialInvestment, inputs, 10, RolloverType.Month, true);
Assert.Equal(250.51 - initialInvestment, actual, 2);
}
public void CalculateXNpv_ForKnownAnnualValues_ReturnsExpected()
{
var sut = new NpvCalculator();
var inputs = new List<Cashflow>()
{
new Cashflow() { Period = new DateTime(2014, 1, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2015, 1, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2016, 1, 1), Amount = 30 },
new Cashflow() { Period = new DateTime(2017, 1, 1), Amount = 35 },
new Cashflow() { Period = new DateTime(2018, 1, 1), Amount = 20 },
new Cashflow() { Period = new DateTime(2019, 1, 1), Amount = 15 },
new Cashflow() { Period = new DateTime(2020, 1, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2021, 1, 1), Amount = 25 },
new Cashflow() { Period = new DateTime(2022, 1, 1), Amount = 15 },
new Cashflow() { Period = new DateTime(2023, 1, 1), Amount = 15 },
new Cashflow() { Period = new DateTime(2024, 1, 1), Amount = 20 },
new Cashflow() { Period = new DateTime(2025, 1, 1), Amount = 10 },
};
var initialInvestment = 100;
var actual = sut.CalculateNpv(initialInvestment, inputs, 10, RolloverType.Annual, false);
Assert.Equal(157.55 - initialInvestment, actual, 2);
}
