public async Task <T> GetMemento <T>(int aggregateId) where T : BaseMemento
{
var mementos = await _mementoRepository.FindByAsync(m => m.Id == aggregateId).ConfigureAwait(false);
var memento = mementos.LastOrDefault();
if (memento != null)
{
return((T)_mementoMapper.ToAnyEntity(memento));
}
return(null);
}
public async Task UserCategoryAggregateRootCanBeConstructedFromMemento()
{
// Arrange
// No version - it's new
var e1 = new UserCategoryCreateCommand("Category Name");
// Acting on Version 0
var e2 = new UserCategoryNameChangeCommand(1, "Category Name Changed Once", 0);
// Acting on Version 1
var e3 = new UserCategoryNameChangeCommand(1, "Category Name Changed Twice", 1);
// Acting on Version 2
var e4 = new UserCategoryNameChangeCommand(1, "Category Name Changed Three Times", 2);
// Acting on Version 3
var e5 = new UserCategoryNameChangeCommand(1, "Category Name Changed Four Times", 3);
// Act
await _commandBus.Send <UserCategoryCreateCommand>(e1);
await _commandBus.Send <UserCategoryNameChangeCommand>(e2);
await _commandBus.Send <UserCategoryNameChangeCommand>(e3);
await _commandBus.Send <UserCategoryNameChangeCommand>(e4);
await _commandBus.Send <UserCategoryNameChangeCommand>(e5);
// Assert
var m = (await _mementoRepository.FindByAsync(x => x.Id == 1)).FirstOrDefault();
Assert.IsNotNull(m);
var memento = DatabaseEventStorage.DeSerialize <UserCategoryMemento>(m.Data);
UserCategory c = new UserCategory();
c.SetMemento(memento);
Assert.AreEqual("Category Name Changed Three Times", c.Name);
}