public void FeeCalculator_ShouldAddMonthlyFee_WhenAtLeastOneTransaction()
{
// We check following requirementInvoice Fee should be included in the fee for first transaction of the month
// Arrange
var merchants = new Dictionary <string, Merchant>();
merchants.Add(sevenEleven, new Merchant()
{
DiscountPercentage = 0, Name = sevenEleven, FeeAsPercentage = 1
});
merchants.Add(circleK, new Merchant()
{
DiscountPercentage = 0, Name = circleK, FeeAsPercentage = 2
});
List <Transaction> transactions = new List <Transaction>
{
new Transaction {
DoneOn = new DateTime(2018, 9, 1), Amount = 100, Owner = merchants[sevenEleven]
},
new Transaction {
DoneOn = new DateTime(2018, 9, 19), Amount = 100, Owner = merchants[sevenEleven]
},
new Transaction {
DoneOn = new DateTime(2018, 10, 19), Amount = 100, Owner = merchants[circleK]
},
};
var calculator = new FeeCalculator();
// Act
calculator.InitializeFeeCalculation();
var processedFirstTransaction = calculator.CalculateFee(transactions[0]);
var processedSecondTransaction = calculator.CalculateFee(transactions[1]);
var processedThirdTransaction = calculator.CalculateFee(transactions[2]);
// Assert
// Month #9
Assert.Equal(30M, processedFirstTransaction.Fee);
Assert.Equal(sevenEleven, processedFirstTransaction.RelatedTransaction.Owner.Name);
Assert.Equal(new DateTime(2018, 9, 1), processedFirstTransaction.RelatedTransaction.DoneOn);
Assert.Equal(1M, processedSecondTransaction.Fee);
Assert.Equal(sevenEleven, processedSecondTransaction.RelatedTransaction.Owner.Name);
Assert.Equal(new DateTime(2018, 9, 19), processedSecondTransaction.RelatedTransaction.DoneOn);
// Month #10
Assert.Equal(31M, processedThirdTransaction.Fee);
Assert.Equal(circleK, processedThirdTransaction.RelatedTransaction.Owner.Name);
Assert.Equal(new DateTime(2018, 10, 19), processedThirdTransaction.RelatedTransaction.DoneOn);
}
public void FeeCalculator_ShouldNotAddMonthlyFee_WhenFeeIsZero()
{
// IWe check following requirement-If transaction fee is 0 after applying discounts, InvoiceFee should not be added
// Arrange
var merchants = new Dictionary <string, Merchant>();
merchants.Add(sevenEleven, new Merchant()
{
DiscountPercentage = 0, Name = sevenEleven, FeeAsPercentage = 0
});
List <Transaction> transactions = new List <Transaction>
{
new Transaction {
DoneOn = new DateTime(2018, 9, 1), Amount = 100, Owner = merchants[sevenEleven]
},
new Transaction {
DoneOn = new DateTime(2018, 9, 19), Amount = 100, Owner = merchants[sevenEleven]
},
};
var calculator = new FeeCalculator();
// Act
calculator.InitializeFeeCalculation();
var processedFirstTransactions = calculator.CalculateFee(transactions[0]);
var processedSecondTransaction = calculator.CalculateFee(transactions[1]);
// Assert
// Month #9
Assert.Equal(0, processedFirstTransactions.Fee);
Assert.Equal(sevenEleven, processedFirstTransactions.RelatedTransaction.Owner.Name);
Assert.Equal(new DateTime(2018, 9, 1), processedFirstTransactions.RelatedTransaction.DoneOn);
Assert.Equal(0, processedSecondTransaction.Fee);
Assert.Equal(sevenEleven, processedSecondTransaction.RelatedTransaction.Owner.Name);
Assert.Equal(new DateTime(2018, 9, 19), processedSecondTransaction.RelatedTransaction.DoneOn);
}
public void FeeCalculator_ShouldCalculateFee_WhenDiscountProvided(string merchantName, string stringifiedTransactionDate, decimal percentageFee, decimal transactionAmount, decimal discount, decimal expectedFee)
{
// Arrange
var calculator = new FeeCalculator();
DateTime transactionDate;
var transactionDateValid = DateTime.TryParseExact(stringifiedTransactionDate, "yyyy-MM-dd", null, DateTimeStyles.None, out transactionDate);
var merchant = new Merchant()
{
Name = merchantName, FeeAsPercentage = percentageFee, DiscountPercentage = discount
};
var transaction = new Transaction()
{
Owner = merchant, Amount = transactionAmount, DoneOn = transactionDate
};
// Act
calculator.InitializeFeeCalculation();
var processedTransaction = calculator.CalculateFee(transaction);
// Assert
Assert.True(transactionDateValid);
Assert.Equal(expectedFee, processedTransaction.Fee);
}