public void TakeSnapshot(Guid aggregateId)
{
// arrange;
var savedEvents = new IAggregateEvent <Guid>[]
{
new GiftCardCreated(aggregateId, DateTime.UtcNow.AddDays(-10), 100),
new GiftCardDebited(aggregateId, 2, DateTime.UtcNow.AddDays(-5), 30),
new GiftCardDebited(aggregateId, 3, DateTime.UtcNow.AddDays(-2), 20)
};
var sut = new GiftCard(aggregateId, savedEvents);
// act
sut.TakeSnapshot();
// assert
Assert.Equal(3, sut.Version);
IAggregateChangeset <Guid> changeset = sut.GetChangeset();
Assert.NotNull(changeset.Snapshot);
Assert.IsType <GiftCardSnapshot>(changeset.Snapshot);
var snapshot = changeset.Snapshot as GiftCardSnapshot;
Assert.Equal(aggregateId, snapshot.AggregateId);
Assert.Equal(3, snapshot.AggregateVersion);
Assert.Equal(sut.Balance, snapshot.Balance);
}
protected async Task SaveAggregateAsync(TAggregate aggregate)
{
IAggregateChangeset <TKey> changeset = aggregate.GetChangeset();
foreach (IAggregateEvent <TKey> @event in changeset.Events)
{
await _eventStore.AddEventAsync(@event);
await OnEventSavedAsync(@event);
}
changeset.Commit();
}
protected override async Task <IAggregateChangeset <TKey> > SaveAggregateAsync(
TAggregate aggregate,
CancellationToken cancellationToken = default)
{
if (aggregate is null)
{
throw new System.ArgumentNullException(nameof(aggregate));
}
IAggregateChangeset <TKey> changeset = await base.SaveAggregateAsync(aggregate, cancellationToken)
.ConfigureAwait(false);
await CacheAsync(aggregate, -1, cancellationToken).ConfigureAwait(false);
return(changeset);
}
public void Constructor_CreateNew(decimal initialCredit)
{
// act
var sut = new GiftCard(initialCredit);
IAggregateChangeset <Guid> changeset = sut.GetChangeset();
// assert
Assert.Equal(1, sut.Version);
Assert.Single(sut.Events);
var createdEvent = sut.Events.SingleOrDefault() as GiftCardCreated;
Assert.NotNull(createdEvent);
Assert.Equal(1, createdEvent.AggregateVersion);
Assert.Single(changeset.Events);
Assert.Same(createdEvent, changeset.Events.Single());
}
public void Constructor_CreateFromSnapshotWithSavedEvents(Guid aggregateId)
{
// arrange;
var snapshot = new GiftCardSnapshot(aggregateId, 10, 70);
var history = new IAggregateEvent <Guid>[]
{
new GiftCardDebited(aggregateId, 11, DateTime.UtcNow.AddDays(-5), 30)
};
// act
var sut = new GiftCard(aggregateId, snapshot, history);
IAggregateChangeset <Guid> changeset = sut.GetChangeset();
// assert
Assert.Equal(70 - 30, sut.Balance);
Assert.Equal(aggregateId, sut.Id);
Assert.Equal(11, sut.Version);
Assert.Single(sut.Events);
Assert.Empty(changeset.Events);
Assert.Null(changeset.Snapshot);
}
public void Constructor_CreateFromSavedEvents(Guid aggregateId)
{
// arrange;
var history = new IAggregateEvent <Guid>[]
{
new GiftCardCreated(aggregateId, DateTime.UtcNow.AddDays(-10), 100),
new GiftCardDebited(aggregateId, 2, DateTime.UtcNow.AddDays(-5), 30)
};
// act
var sut = new GiftCard(aggregateId, history);
IAggregateChangeset <Guid> changeset = sut.GetChangeset();
// assert
Assert.Equal(100 - 30, sut.Balance);
Assert.Equal(aggregateId, sut.Id);
Assert.Equal(2, sut.Version);
Assert.Equal(2, sut.Events.Count());
Assert.Empty(changeset.Events);
Assert.Null(changeset.Snapshot);
}
protected virtual async Task <IAggregateChangeset <TKey> > SaveAggregateAsync(TAggregate aggregate,
CancellationToken cancellationToken = default)
{
if (aggregate is null)
{
throw new ArgumentNullException(nameof(aggregate));
}
IAggregateChangeset <TKey> changeset = aggregate.GetChangeset();
foreach (IAggregateEvent <TKey> @event in changeset.Events)
{
await _eventStore.AddEventAsync(@event, cancellationToken).ConfigureAwait(false);
}
if (changeset.Snapshot != null)
{
await _snapshotStore.AddSnapshotAsync(changeset.Snapshot, cancellationToken).ConfigureAwait(false);
}
changeset.Commit();
return(changeset);
}