public async Task UserCategoryUpdateCommandTriggersEventToUpdateQueryDbWithNewCategoryName()
{
//Arrange
string newName = "NewCategoryNameForCategory2";
await _categoryRepo.Create(new Category { Id = 1, Name = "Category1", Version = 0 });
await _categoryRepo.Create(new Category { Id = 2, Name = "Category2", Version = 0 });
await _categoryRepo.Create(new Category { Id = 3, Name = "Category3", Version = 0 });
UserCategoryCreatedEvent e = new UserCategoryCreatedEvent(1, "Category2", DateTime.UtcNow);
await _eventRepository.Create(new Event { Id = 2, AggregateId = 1, Data = DatabaseEventStorage.Serialize <UserCategoryCreatedEvent>(e) });
await _aggregateRepository.Create(new AggregateRoot { EventVersion = 0, Id = 1 });
//Act
await _commandBus.Send(new UserCategoryNameChangeCommand(1, newName, 0));
var cats = await _categoryRepo.FindByAsync(q => q.Id == 1).ConfigureAwait(false);
var cat = cats.FirstOrDefault();
//Assert
Assert.AreEqual(newName, cat.Name);
Assert.AreEqual(1, cat.Version);
}
public async Task Save(AggregateRoot aggregate)
{
var uncommittedChanges = aggregate.GetUncommittedChanges();
var version = aggregate.Version;
foreach (var @event in uncommittedChanges)
{
version++;
if (version > 2)
{
if (version % 3 == 0)
{
var originator = (IOriginator)aggregate;
var memento = originator.GetMemento();
memento.Version = version;
await SaveMemento(memento).ConfigureAwait(false);
}
}
@event.Version = version;
aggregate.Version = version;
if (version == 0)
{
var ag = await _aggregateRepository.Create(_aggregateMapper.ToProviderEntity(aggregate)).ConfigureAwait(false);
@event.AggregateId = ag.Id;
}
else
{
var aggregateRoots = await _aggregateRepository.FindByAsync(x => x.Id == aggregate.Id).ConfigureAwait(false);
var aggregateRoot = aggregateRoots.FirstOrDefault();
if (aggregateRoot == null)
{
throw new NullReferenceException();
}
aggregateRoot.Version = version;
await _aggregateRepository.Update(aggregateRoot).ConfigureAwait(false);
}
await _eventRepository.Create(_eventMapper.ToProviderEntity(@event)).ConfigureAwait(false);
}
foreach (var @event in uncommittedChanges)
{
var desEvent = Converter.ChangeTo(@event, @event.GetType());
await _eventBus.Publish(desEvent).ConfigureAwait(false);
}
}