public void TestTransactionFeesFromFile(string transactionFilePath, string assertResultsFilePath, string implementerAssemblyName)
{
var assemblyPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
var factory = DynamicLoader.LoadModuleType <IMerchantFeesCalculatorFactory>(Path.Combine(assemblyPath, implementerAssemblyName));
var context = DynamicLoader.LoadModuleType <ITransactionContext>(Path.Combine(assemblyPath, implementerAssemblyName));
var source = factory.CreateTextBasedTransactionSource(transactionFilePath);
var sourceFormat = factory.CreateTransactionInputFormat();
var feeCalculator = factory.CreateTransactionFeeCalculator(29);
var outputFormatter = factory.CreateOutputFormatter();
context.ApplyDiscount("TELIA", factory.CreatePercentageDiscount(10));
context.ApplyDiscount("CIRCLE_K", factory.CreatePercentageDiscount(20));
using (var outputWriter = new TestOutputWriter(assertResultsFilePath)) // use custom test writer
{
foreach (var transaction in source.FetchTransactions(sourceFormat, context))
{
context.LogTransaction(transaction);
var fee = feeCalculator.Compute(transaction, context);
outputWriter.Write(fee, outputFormatter);
}
}
}
static void Main(string[] args)
{
if (args.Length != 1)
{
Console.WriteLine("Incorrect syntax. Provide file for transactions.");
return;
}
// read input file name
var transactionFilePath = args[0];
// retrieve root factory and context objects from implementing assembly
// note that "MobilePay.MerchantFeesCalculator.BasicImplementation.dll" is implemented all internal so that
// client applications would use API to access the transaction fee computation objects
var factory = DynamicLoader.LoadModuleType <IMerchantFeesCalculatorFactory>(
"MobilePay.MerchantFeesCalculator.BasicImplementation.dll");
var context = DynamicLoader.LoadModuleType <ITransactionContext>(
"MobilePay.MerchantFeesCalculator.BasicImplementation.dll");
// generate application objects from implementing assembly
var source = factory.CreateTextBasedTransactionSource(transactionFilePath);
var sourceFormat = factory.CreateTransactionInputFormat();
var outputWriter = factory.CreateOutputWriter();
var outputFormatter = factory.CreateOutputFormatter();
// TODO: the fixed 29DKK fee could be refactored into separate object to and implemented
// TODO: in more elegant fashion as discounts below
var feeCalculator = factory.CreateTransactionFeeCalculator(29);
// apply discounts to major companies
context.ApplyDiscount("TELIA", factory.CreatePercentageDiscount(10));
context.ApplyDiscount("CIRCLE_K", factory.CreatePercentageDiscount(20));
// fetch transactions - lazy load
foreach (var transaction in source.FetchTransactions(sourceFormat, context))
{
// log transaction into the system
context.LogTransaction(transaction);
// compute the fee
var fee = feeCalculator.Compute(transaction, context);
// output
outputWriter.Write(fee, outputFormatter);
}
Console.ReadKey();
}
public void TestSimpleFormatter()
{
var factory = DynamicLoader.LoadModuleType <IMerchantFeesCalculatorFactory>(
"MobilePay.MerchantFeesCalculator.BasicImplementation.dll");
var formatter = factory.CreateOutputFormatter();
var transactionMock = new Moq.Mock <ITransaction>();
transactionMock.SetupGet(m => m.Amount).Returns(100m);
var transactionFeeMock = new Moq.Mock <ITransactionFee>();
transactionFeeMock.SetupGet(m => m.Transaction.Date).Returns(DateTime.Parse("2001-02-03"));
transactionFeeMock.SetupGet(m => m.Transaction.Merchant.Name).Returns("NORFA");
transactionFeeMock.SetupGet(m => m.Value).Returns(20);
var line = formatter.Format(transactionFeeMock.Object);
Assert.AreEqual("2001-02-03 NORFA $20.00", line);
}
public void TestCase1(string implementerAssemblyName)
{
var assemblyPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
var factory = DynamicLoader.LoadModuleType <IMerchantFeesCalculatorFactory>(Path.Combine(assemblyPath, implementerAssemblyName));
var context = DynamicLoader.LoadModuleType <ITransactionContext>(Path.Combine(assemblyPath, implementerAssemblyName));
var source = new TestHelper();
var outputWriter = source;
var sourceFormat = factory.CreateTransactionInputFormat();
var feeCalculator = factory.CreateTransactionFeeCalculator(0);
var outputFormatter = factory.CreateOutputFormatter();
foreach (var transaction in source.FetchTransactions(sourceFormat, context))
{
context.LogTransaction(transaction);
var fee = feeCalculator.Compute(transaction, context);
outputWriter.Write(fee, outputFormatter);
}
}
