public void TestCalculateSavingInterestOnTransactionLessThan1000()
{
Transaction[] trx = new []
{
new Transaction(500,new DateTime(1970,1,1)),
};
SavingInterestCalculator calculator = new SavingInterestCalculator();
Assert.AreEqual(500.0 * 0.001, calculator.Calculate(trx,DateTime.MaxValue), DOUBLE_DELTA);
}
public void TestCalculateSavingInterestOnIntervals()
{
Transaction[] trx = new []
{
new Transaction(500,new DateTime(1970,1,1)),
new Transaction(500,new DateTime(1970,2,1)),
new Transaction(500,new DateTime(1970,3,1)),
new Transaction(500,new DateTime(1970,4,1)),
new Transaction(-1000,new DateTime(1970,5,1)),
};
SavingInterestCalculator calculator = new SavingInterestCalculator();
Assert.AreEqual(1000.0 * 0.001, calculator.Calculate(trx, DateTime.MaxValue), DOUBLE_DELTA);
Assert.AreEqual(1 + 1000 * 0.002, calculator.Calculate(trx, new DateTime(1970,4,15)), DOUBLE_DELTA);
}
public void TestCalculateMaxiSavingInterestWithdrawalOlderThen10Days()
{
Transaction[] trx = new[]
{
new Transaction(2000,new DateTime(1970,1,1)),
new Transaction(-1000, new DateTime(1970,6,30))
};
MaxiSavingInterestCalculator calculator = new MaxiSavingInterestCalculator();
double amount = calculator.Calculate(trx, new DateTime(1970, 12, 27));
double expected =
2000.0.DailyInterest(5.0, 180)
+ 1000.0.DailyInterest(5.0,180);
Assert.AreEqual(expected, amount, DOUBLE_DELTA);
}
public void TestCalculateMaxiSavingInterestFor180DAnd360ays()
{
Transaction[] trx = new[]
{
new Transaction(1000,new DateTime(1970,1,1)),
new Transaction(1000,new DateTime(1970,6,30)),
};
MaxiSavingInterestCalculator calculator = new MaxiSavingInterestCalculator();
double amount = calculator.Calculate(trx, new DateTime(1970, 12, 27));
Assert.AreEqual(75, amount, DOUBLE_DELTA);
}
