public void Closed_buyer_does_not_react_to_further_messages()
{
Buyer buyer = CreateClosedBuyer(maximumPrice: 10);
StockCommand command = buyer.Process(StockEvent.Price(10, 10));
command.ShouldEqual(StockCommand.None());
buyer.Snapshot.State.ShouldEqual(BuyerState.Closed);
}
public void Buyer_attempts_to_buy_maximum_amount_available()
{
Buyer buyer = CreateJoiningBuyer(maximumPrice: 50, numberToBuy: 10);
StockCommand command = buyer.Process(StockEvent.Price(10, 5));
command.ShouldEqual(StockCommand.Buy(10, 5));
buyer.SnapshotShouldEqual(BuyerState.Buying, 10, 5, 0);
}
public void Buyer_closes_when_it_buys_enough_items()
{
Buyer buyer = CreateMonitoringBuyer("Buyer", numberToBuy: 5);
StockCommand command = buyer.Process(StockEvent.Purchase("Buyer", 5));
command.ShouldEqual(StockCommand.None());
buyer.Snapshot.State.ShouldEqual(BuyerState.Closed);
}
public void Buyer_buys_when_price_event_with_appropriate_price_arrives()
{
Buyer buyer = CreateJoiningBuyer(maximumPrice: 50);
StockCommand command = buyer.Process(StockEvent.Price(10, 5));
command.ShouldEqual(StockCommand.Buy(10, 1));
buyer.SnapshotShouldEqual(BuyerState.Buying, 10, 5, 0);
}
public void Buyer_does_not_buy_when_price_event_with_too_high_price_arrives()
{
var buyer = CreateJoiningBuyer(maximumPrice: 10);
StockCommand command = buyer.Process(StockEvent.Price(20, 5));
command.ShouldEqual(StockCommand.None());
buyer.SnapshotShouldEqual(BuyerState.Monitoring, 20, 5, 0);
}
public void Closes_when_item_closes()
{
var buyer = CreateJoiningBuyer();
StockCommand command = buyer.Process(StockEvent.Close());
command.ShouldEqual(StockCommand.None());
buyer.SnapshotShouldEqual(BuyerState.Closed, 0, 0, 0);
}
public void Buyer_does_not_react_to_a_purchase_event_related_to_another_buyer()
{
Buyer buyer = CreateMonitoringBuyer("Buyer");
StockCommand command = buyer.Process(StockEvent.Purchase("Some other buyer", 1));
command.ShouldEqual(StockCommand.None());
buyer.Snapshot.State.ShouldEqual(BuyerState.Monitoring);
buyer.Snapshot.BoughtSoFar.ShouldEqual(0);
}
public void Buyer_updates_items_bought_so_far_when_purchase_event_with_the_same_user_name_arrives()
{
Buyer buyer = CreateMonitoringBuyer("name", numberInStock: 10);
StockCommand command = buyer.Process(StockEvent.Purchase("name", 1));
command.ShouldEqual(StockCommand.None());
buyer.Snapshot.State.ShouldEqual(BuyerState.Monitoring);
buyer.Snapshot.BoughtSoFar.ShouldEqual(1);
buyer.Snapshot.NumberInStock.ShouldEqual(9);
}
public void Two_commands_are_equal_if_their_contents_match()
{
StockCommand command1 = StockCommand.Buy(123, 10);
StockCommand command2 = StockCommand.Buy(123, 10);
bool areEqual1 = command1.Equals(command2);
bool areEqual2 = command1 == command2;
bool areEqual3 = command1.GetHashCode() == command2.GetHashCode();
areEqual1.ShouldBeTrue();
areEqual2.ShouldBeTrue();
areEqual3.ShouldBeTrue();
}
private void StockMessageRecieved(string message)
{
StockEvent stockEvent = StockEvent.From(message);
StockCommand stockCommand = _buyer.Process(stockEvent);
if (stockCommand != StockCommand.None())
{
_connection.SendMessage(stockCommand.ToString());
}
_repository.Save(ItemId, _buyer);
Notify(nameof(CurrentPrice));
Notify(nameof(NumberInStock));
Notify(nameof(BoughtSoFar));
Notify(nameof(State));
}
public void Buy_command_is_of_appropriate_content()
{
StockCommand command = StockCommand.Buy(123, 10);
command.ToString().ShouldEqual("Command: BUY; Price: 123; Number: 10");
}
