public void Should_publish_pasta_price_as_soon_as_all_needed_RawMaterialMarketData_are_received()
{
// spaghetti(eggs-flour)
// Prepares the marketdata mocks
var eggsMarketDataMock = Substitute.For<IRawMaterialMarketData>();
eggsMarketDataMock.RawMaterialName.Returns("eggs");
var flourMarketDataMock = Substitute.For<IRawMaterialMarketData>();
flourMarketDataMock.RawMaterialName.Returns("flour");
// setup the pricing agent
var sequencer = new Sequencer(new DirectDispatcher());
var pricingAgent = new PastaPricingAgent(sequencer, "spaghetti");
pricingAgent.SubscribeToMarketData(new List<IRawMaterialMarketData>() { eggsMarketDataMock, flourMarketDataMock });
var pastaPriceHasChanged = false;
pricingAgent.PastaPriceChanged += (o, args) => { pastaPriceHasChanged = true; };
Check.That(pastaPriceHasChanged).IsFalse();
// Raises event for "eggs"
eggsMarketDataMock.PriceChanged += Raise.EventWith(new object(), new RawMaterialPriceChangedEventArgs("eggs", 0));
Check.That(pastaPriceHasChanged).IsFalse();
// Raises event for "flour" => all needed market data has been received, the price must have been published now
flourMarketDataMock.PriceChanged += Raise.EventWith(new object(), new RawMaterialPriceChangedEventArgs("flour", 0));
Check.That(pastaPriceHasChanged).IsTrue();
}
public void DoesNotLoseAnyTaskWithTwoWriterThreadsOnTheSameSequencer()
{
var rootDispatcher = new DotNetThreadPoolUnitOfExecution();
var sequencer = new Sequencer(rootDispatcher);
const int NumberOfWritesPerThread = 10000;
var tasksOutput = new List<int>();
using (var unleashThreadsEvent = new AutoResetEvent(false))
using (var firstWriterFinishedEvent = new AutoResetEvent(false))
using (var secondWriterFinishedEvent = new AutoResetEvent(false))
{
var firstWriter = new Thread(() => this.WriterRoutine(sequencer, unleashThreadsEvent, 0, NumberOfWritesPerThread, tasksOutput, firstWriterFinishedEvent));
firstWriter.Start();
var secondWriter = new Thread(() => this.WriterRoutine(sequencer, unleashThreadsEvent, 0, NumberOfWritesPerThread, tasksOutput, secondWriterFinishedEvent));
secondWriter.Start();
// ready, set, mark
unleashThreadsEvent.Set();
// Waits until the two writers have finished their writes
Check.That(firstWriterFinishedEvent.WaitOne(2 * ThreeSecondsMax) && secondWriterFinishedEvent.WaitOne(2 * ThreeSecondsMax)).IsTrue();
// Checks that no write has been missing
Check.That(tasksOutput).HasSize(2 * NumberOfWritesPerThread);
}
}
public void SequencerExecutesTasksInTheOrderOfTheirDispatch()
{
var rootDispatcher = new DotNetThreadPoolUnitOfExecution();
var sequencer = new Sequencer(rootDispatcher);
const int TasksNumber = 100000;
var tasksOutput = new List<int>();
using (var dispatchingFinishedEvent = new AutoResetEvent(false))
{
// Dispatches tasks to the sequencer
for (int i = 0; i < TasksNumber; i++)
{
int antiClosureSideEffectNumber = i;
sequencer.Dispatch(() => tasksOutput.Add(antiClosureSideEffectNumber));
}
// Indicates the end of the sequence with a final task
sequencer.Dispatch(() => dispatchingFinishedEvent.Set());
// Waits for sequence completion
Check.That(dispatchingFinishedEvent.WaitOne(ThreeSecondsMax)).IsTrue();
// Checks that everything was properly processed in sequence
for (int k = 0; k < TasksNumber; k++)
{
Check.That(tasksOutput[k]).IsEqualTo(k);
}
}
}
public void Should_Compute_expected_price_from_known_market_data_inputs()
{
// Check.That(pastaCalculator.Compute(flourPrice: 1.3m, eggsPrice: 2.4m, flavorPrice: 1.2m)).IsEqualTo(2.52m);
// spaghetti(eggs-flour)
// Prepares the marketdata mocks
var eggsMarketDataMock = Substitute.For<IRawMaterialMarketData>();
eggsMarketDataMock.RawMaterialName.Returns("eggs");
var flourMarketDataMock = Substitute.For<IRawMaterialMarketData>();
flourMarketDataMock.RawMaterialName.Returns("flour");
var tomatoMarketDataMock = Substitute.For<IRawMaterialMarketData>();
tomatoMarketDataMock.RawMaterialName.Returns("tomato");
// setup the pricing agent
var sequencer = new Sequencer(new DirectDispatcher());
var pricingAgent = new PastaPricingAgent(sequencer, "tomato spaghetti");
pricingAgent.SubscribeToMarketData(new List<IRawMaterialMarketData>() { eggsMarketDataMock, flourMarketDataMock, tomatoMarketDataMock });
var publishedPastaPrice = 0m;
pricingAgent.PastaPriceChanged += (o, args) => { publishedPastaPrice = args.Price; };
Check.That(publishedPastaPrice).IsEqualTo(0);
// Raises event for "eggs"
eggsMarketDataMock.PriceChanged += Raise.EventWith(new object(), new RawMaterialPriceChangedEventArgs("eggs", 2.4m));
Check.That(publishedPastaPrice).IsEqualTo(0);
// Raises event for "tomato"
tomatoMarketDataMock.PriceChanged += Raise.EventWith(new object(), new RawMaterialPriceChangedEventArgs("tomato", 1.2m));
Check.That(publishedPastaPrice).IsEqualTo(0);
// Raises event for "flour" => all needed market data has been received, the price must have been published now
flourMarketDataMock.PriceChanged += Raise.EventWith(new object(), new RawMaterialPriceChangedEventArgs("flour", 1.3m));
const decimal ExpectedPastaPrice = 2.52m;
Check.That(publishedPastaPrice).IsEqualTo(ExpectedPastaPrice);
}
private void WriterRoutine(Sequencer sequencer, AutoResetEvent readySetMarkEvent, int firstIndex, int lastIndex, List<int> tasksOutput, AutoResetEvent lastTaskEvent)
{
readySetMarkEvent.WaitOne(ThreeSecondsMax);
for (int i = firstIndex; i < lastIndex; i++)
{
int antiClosureSideEffectNumber = i;
sequencer.Dispatch(() => tasksOutput.Add(antiClosureSideEffectNumber));
}
// Indicates the end of the sequence with a final task
sequencer.Dispatch(() => lastTaskEvent.Set());
}
