protected override Task <RequestStatus> HandleCommand(BuyNowCommand request, CancellationToken cancellationToken)
{
var user = _userRepository.FindUser(request.SignedInUser);
if (user == null)
{
_logger.LogError("BuyNowCommandHandler cannot find user {@user}", request.SignedInUser);
throw new CommandException($"Cannot find user: {user.UserIdentity}");
}
var auction = _auctionRepository.FindAuction(request.AuctionId);
if (auction == null)
{
throw new CommandException($"Invalid auction id: {request.AuctionId}");
}
var buyNowService = new BuyNowService(_userRepository);
var generatedEvents = buyNowService.BuyNow(auction, user);
generatedEvents.AddRange(auction.PendingEvents);
generatedEvents.AddRange(user.PendingEvents);
_auctionRepository.UpdateAuction(auction);
_userRepository.UpdateUser(user);
_eventBusService.Publish(generatedEvents, request.CommandContext.CorrelationId, request);
return(Task.FromResult(RequestStatus.CreateFromCommandContext(request.CommandContext, Status.PENDING)));
}
public void BuyNow_when_auction_have_bids_returns_credits_to_users_and_generates_valid_events()
{
auction.Raise(users[0], 1);
var bid1 = auction.Bids.Last();
auction.Raise(users[1], 2);
var bid2 = auction.Bids.Last();
auction.Raise(users[2], 3);
var bid3 = auction.Bids.Last();
auction.MarkPendingEventsAsHandled();
foreach (var user in users)
{
user.MarkPendingEventsAsHandled();
}
var generatedEvents = service.BuyNow(auction, users[2]);
generatedEvents.Count.Should().Be(2);
foreach (var user in users.Take(2))
{
user.Credits.Should().Be(1000);
user.PendingEvents.Count.Should().Be(1);
user.PendingEvents.Last().Should().BeOfType <CreditsReturned>();
}
users[2].Credits.Should().Be(1000 - auction.BuyNowPrice);
users[2].PendingEvents.Count.Should().Be(2);
users[2].PendingEvents.First().Should().BeOfType <CreditsReturned>();
users[2].PendingEvents.Last().Should().BeOfType <CreditsWithdrawn>();
}