public async Task SaveEvents_throws_DuplicateCorrelationException_if_correlation_duplicate()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var usernameChanged = new FakeUsernameChanged();
new DomainEvent[] { created, usernameChanged }.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
var correlationId = Guid.NewGuid();
await sut.SaveEvents <FakeUser>(new[] { created }, correlationId : correlationId);
// Act
Func <Task> action = () =>
sut.SaveEvents <FakeUser>(new[] { usernameChanged }, correlationId: correlationId);
// Assert
action.ShouldThrow <DuplicateCorrelationException>().Where(
x =>
x.SourceType == typeof(FakeUser) &&
x.SourceId == userId &&
x.CorrelationId == correlationId &&
x.InnerException is DbUpdateException);
}
public async Task SaveEvents_does_not_insert_UniqueIndexedProperty_if_property_value_is_null()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated {
Username = null
};
created.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
await sut.SaveEvents <FakeUser>(new DomainEvent[] { created });
// Assert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
UniqueIndexedProperty actual = await db
.UniqueIndexedProperties
.Where(
p =>
p.AggregateType == typeof(FakeUser).FullName &&
p.PropertyName == nameof(FakeUserCreated.Username) &&
p.PropertyValue == created.Username)
.SingleOrDefaultAsync();
actual.Should().BeNull();
}
}
public async Task SaveEvents_inserts_Correlation_entity_correctly()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var correlationId = Guid.NewGuid();
created.Raise(userId);
DateTime now = DateTime.UtcNow;
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
await sut.SaveEvents <FakeUser>(new[] { created }, correlationId : correlationId);
// Assert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
Correlation correlation = await db
.Correlations
.Where(
c =>
c.AggregateType == typeof(FakeUser).FullName &&
c.AggregateId == userId &&
c.CorrelationId == correlationId)
.SingleOrDefaultAsync();
correlation.Should().NotBeNull();
correlation.HandledAt.Should().BeCloseTo(now, precision: 100);
}
}
public void SaveEvents_fails_if_events_not_have_same_source_id()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated
{
SourceId = userId,
Version = 1,
RaisedAt = DateTime.UtcNow,
};
var usernameChanged = new FakeUsernameChanged
{
SourceId = Guid.NewGuid(),
Version = 2,
RaisedAt = DateTime.UtcNow,
};
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(new DomainEvent[] { created, usernameChanged });
// Assert
action.ShouldThrow <ArgumentException>().Where(x => x.ParamName == "events");
}
public async Task SaveEvents_fails_if_version_of_first_event_not_follows_aggregate()
{
// Arrange
var userId = Guid.NewGuid();
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
var aggregate = new Aggregate
{
AggregateId = userId,
AggregateType = typeof(FakeUser).FullName,
Version = 1,
};
db.Aggregates.Add(aggregate);
await db.SaveChangesAsync();
}
var usernameChanged = new FakeUsernameChanged();
usernameChanged.Raise(userId, 2);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(new[] { usernameChanged });
// Assert
action.ShouldThrow <ArgumentException>().Where(x => x.ParamName == "events");
}
public void SaveEvents_fails_if_versions_not_sequential()
{
// Arrange
var events = new DomainEvent[]
{
new FakeUserCreated {
Version = 1
},
new FakeUsernameChanged {
Version = 2
},
new FakeUsernameChanged {
Version = 4
},
};
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(events);
// Assert
action.ShouldThrow <ArgumentException>().Where(x => x.ParamName == "events");
}
public async Task SaveEvents_inserts_Aggregate_correctly_for_new_aggregate_id()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var events = new DomainEvent[] { created };
events.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
await sut.SaveEvents <FakeUser>(events);
// Assert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
Aggregate actual = await db
.Aggregates
.Where(a => a.AggregateId == userId)
.SingleOrDefaultAsync();
actual.Should().NotBeNull();
actual.AggregateType.Should().Be(typeof(FakeUser).FullName);
actual.Version.Should().Be(created.Version);
}
}
public async Task PublishAllPendingEvents_deletes_all_pending_events()
{
// Arrange
IEnumerable <FakeUserCreated> createdEvents = fixture
.Build <FakeUserCreated>()
.With(e => e.Version, 1)
.CreateMany();
var eventStore = new SqlEventStore(() => new DataContext(), serializer);
foreach (FakeUserCreated createdEvent in createdEvents)
{
await eventStore.SaveEvents <FakeUser>(new[] { createdEvent });
}
// Act
await sut.PublishAllPendingEvents(CancellationToken.None);
// Assert
using (var db = new DataContext())
{
foreach (FakeUserCreated createdEvent in createdEvents)
{
Guid userId = createdEvent.SourceId;
IQueryable <PendingEvent> query = from e in db.PendingEvents
where e.AggregateId == userId
select e;
(await query.AnyAsync()).Should().BeFalse();
}
}
}
public async Task SaveEvents_inserts_UniqueIndexedProperty_with_value_of_latest_indexed_event()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var usernameChanged = new FakeUsernameChanged();
var events = new DomainEvent[] { created, usernameChanged };
events.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
await sut.SaveEvents <FakeUser>(events);
// Assert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
UniqueIndexedProperty actual = await db
.UniqueIndexedProperties
.Where(
p =>
p.AggregateId == userId &&
p.PropertyName == nameof(FakeUserCreated.Username))
.SingleOrDefaultAsync();
actual.PropertyValue.Should().Be(usernameChanged.Username);
actual.Version.Should().Be(usernameChanged.Version);
}
}
public async Task SaveEvents_saves_pending_events_correctly()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var usernameChanged = new FakeUsernameChanged();
var events = new DomainEvent[] { created, usernameChanged };
events.Raise(userId);
var serializer = new JsonMessageSerializer();
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
serializer);
string operationId = Guid.NewGuid().ToString();
var correlationId = Guid.NewGuid();
string contributor = Guid.NewGuid().ToString();
// Act
await sut.SaveEvents <FakeUser>(events, operationId, correlationId, contributor);
// Asseert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
var pendingEvents = db
.PendingEvents
.Where(e => e.AggregateId == userId)
.OrderBy(e => e.Version)
.ToList();
foreach (var t in pendingEvents.Zip(events, (pending, source) =>
new { Pending = pending, Source = source }))
{
var actual = new
{
t.Pending.Version,
t.Pending.CorrelationId,
t.Pending.Contributor,
Message = serializer.Deserialize(t.Pending.EventJson),
};
actual.ShouldBeEquivalentTo(new
{
t.Source.Version,
OperationId = operationId,
CorrelationId = correlationId,
Contributor = contributor,
Message = t.Source,
},
opts => opts.RespectingRuntimeTypes());
}
}
}
public async Task SaveEvents_does_not_commit_for_empty_events()
{
var sut = new SqlEventStore(
() => mockDbContext,
new JsonMessageSerializer());
await sut.SaveEvents <FakeUser>(Enumerable.Empty <IDomainEvent>());
Mock.Get(mockDbContext)
.Verify(x => x.SaveChangesAsync(), Times.Never());
}
public async Task SaveEvents_does_not_commit_for_empty_events()
{
var context = new DbContextSpy(_dbContextOptions);
var sut = new SqlEventStore(
() => context,
new JsonMessageSerializer());
await sut.SaveEvents <FakeUser>(Enumerable.Empty <IDomainEvent>());
context.CommitCount.Should().Be(0);
}
public async Task SaveEvents_saves_events_correctly()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var usernameChanged = new FakeUsernameChanged();
var events = new DomainEvent[] { created, usernameChanged };
events.Raise(userId);
var serializer = new JsonMessageSerializer();
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
serializer);
// Act
await sut.SaveEvents <FakeUser>(events);
// Asseert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
IEnumerable <object> actual = db
.PersistentEvents
.Where(e => e.AggregateId == userId)
.OrderBy(e => e.Version)
.AsEnumerable()
.Select(e => new
{
e.AggregateType,
e.Version,
e.EventType,
Payload = serializer.Deserialize(e.EventJson),
})
.ToList();
actual.Should().HaveCount(events.Length);
IEnumerable <object> expected = events.Select(e => new
{
AggregateType = typeof(FakeUser).FullName,
e.Version,
EventType = e.GetType().FullName,
Payload = e,
});
actual.ShouldAllBeEquivalentTo(expected);
}
}
public async Task SaveEvents_fails_if_unique_indexed_property_duplicate()
{
// Arrange
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
string duplicateUserName = Guid.NewGuid().ToString();
var macId = Guid.NewGuid();
var macCreated = new FakeUserCreated {
Username = duplicateUserName
};
macCreated.Raise(macId);
await sut.SaveEvents <FakeUser>(new[] { macCreated });
// Act
var toshId = Guid.NewGuid();
var toshCreated = new FakeUserCreated {
Username = duplicateUserName
};
toshCreated.Raise(toshId);
Func <Task> action = () => sut.SaveEvents <FakeUser>(new[] { toshCreated });
// Assert
action.ShouldThrow <Exception>();
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
IQueryable <PersistentEvent> query =
from e in db.PersistentEvents
where e.AggregateId == toshId
select e;
(await query.AnyAsync()).Should().BeFalse();
}
}
public async Task FindIdByUniqueIndexedProperty_returns_aggregate_id_if_property_found()
{
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
created.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
await sut.SaveEvents <FakeUser>(new[] { created });
Guid?actual = await sut.FindIdByUniqueIndexedProperty <FakeUser>("Username", created.Username);
actual.Should().Be(userId);
}
public async Task SaveEvents_commits_once(
FakeUserCreated created,
FakeUsernameChanged usernameChanged)
{
var events = new DomainEvent[] { created, usernameChanged };
RaiseEvents(userId, events);
var sut = new SqlEventStore(
() => mockDbContext,
new JsonMessageSerializer());
await sut.SaveEvents <FakeUser>(events);
Mock.Get(mockDbContext).Verify(
x => x.SaveChangesAsync(CancellationToken.None), Times.Once());
}
public async Task FlushPendingEvents_absorbs_exception_caused_by_that_some_pending_event_already_deleted_since_loaded()
{
// Arrange
var completionSource = new TaskCompletionSource <bool>();
IMessageBus messageBus = new AwaitingMessageBus(completionSource.Task);
var fixture = new Fixture();
FakeUser user = fixture.Create <FakeUser>();
user.ChangeUsername(fixture.Create(nameof(user.Username)));
var eventStore = new SqlEventStore(CreateDbContext, _serializer);
await eventStore.SaveEvents <FakeUser>(user.FlushPendingEvents());
var sut = new SqlEventPublisher(CreateDbContext, _serializer, messageBus);
// Act
Func <Task> action = async() =>
{
Task flushTask = sut.FlushPendingEvents(user.Id, CancellationToken.None);
using (EventStoreDbContext db = CreateDbContext())
{
List <PendingEvent> pendingEvents = await db
.PendingEvents
.Where(e => e.AggregateId == user.Id)
.OrderBy(e => e.Version)
.Take(1)
.ToListAsync();
db.PendingEvents.RemoveRange(pendingEvents);
await db.SaveChangesAsync();
}
completionSource.SetResult(true);
await flushTask;
};
// Assert
action.ShouldNotThrow();
using (EventStoreDbContext db = CreateDbContext())
{
(await db.PendingEvents.AnyAsync(e => e.AggregateId == user.Id))
.Should().BeFalse("all pending events should be deleted");
}
}
public void SaveEvents_fails_if_events_contains_null()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
created.Raise(userId);
var events = new DomainEvent[] { created, null };
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(events);
// Assert
action.ShouldThrow <ArgumentException>().Where(x => x.ParamName == "events");
}
public async Task SaveEvents_commits_once()
{
var userId = Guid.NewGuid();
var events = new DomainEvent[]
{
new FakeUserCreated(),
new FakeUsernameChanged(),
};
events.Raise(userId);
var context = new DbContextSpy(_dbContextOptions);
var sut = new SqlEventStore(
() => context,
new JsonMessageSerializer());
await sut.SaveEvents <FakeUser>(events);
context.CommitCount.Should().Be(1);
}
public async Task SaveEvents_sets_message_properties_correctly()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var usernameChanged = new FakeUsernameChanged();
var events = new DomainEvent[] { created, usernameChanged };
events.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
await sut.SaveEvents <FakeUser>(
events,
correlationId : Guid.NewGuid(),
contributor : Guid.NewGuid().ToString());
// Asseert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
IEnumerable <object> expected = db
.PendingEvents
.Where(e => e.AggregateId == userId)
.OrderBy(e => e.Version)
.AsEnumerable()
.Select(e => new { e.MessageId, e.CorrelationId, e.Contributor })
.ToList();
IEnumerable <object> actual = db
.PersistentEvents
.Where(e => e.AggregateId == userId)
.OrderBy(e => e.Version)
.AsEnumerable()
.Select(e => new { e.MessageId, e.CorrelationId, e.Contributor })
.ToList();
actual.ShouldAllBeEquivalentTo(expected);
}
}
public async Task FlushAllPendingEvents_sends_app_pending_events()
{
// Arrange
IEnumerable <FakeUserCreated> createdEvents = _fixture
.Build <FakeUserCreated>()
.With(e => e.Version, 1)
.With(e => e.RaisedAt, DateTime.UtcNow)
.CreateMany();
var eventStore = new SqlEventStore(() => new DataContext(), _serializer);
foreach (FakeUserCreated createdEvent in createdEvents)
{
await eventStore.SaveEvents <FakeUser>(new[] { createdEvent });
}
var sentEvents = new List <Envelope>();
Mock.Get(_messageBus)
.Setup(
x =>
x.Send(
It.IsAny <IEnumerable <Envelope> >(),
It.IsAny <CancellationToken>()))
.Callback <IEnumerable <Envelope>, CancellationToken>((batch, t) => sentEvents.AddRange(batch))
.Returns(Task.FromResult(true));
// Act
await _sut.FlushAllPendingEvents(CancellationToken.None);
// Assert
foreach (FakeUserCreated createdEvent in createdEvents)
{
sentEvents
.Select(e => e.Message)
.OfType <FakeUserCreated>()
.Where(e => e.SourceId == createdEvent.SourceId)
.Should()
.ContainSingle()
.Which
.ShouldBeEquivalentTo(createdEvent);
}
}
public async Task FlushAllPendingEvents_sends_all_pending_events()
{
// Arrange
IEnumerable <FakeUserCreated> createdEvents = new[]
{
new FakeUserCreated(),
new FakeUserCreated(),
new FakeUserCreated(),
};
var eventStore = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
foreach (FakeUserCreated createdEvent in createdEvents)
{
createdEvent.Raise(Guid.NewGuid());
await eventStore.SaveEvents <FakeUser>(
new[] { createdEvent },
correlationId : default,
public void SaveEvents_fails_if_db_context_does_not_support_transaction()
{
// Arrange
var created = new FakeUserCreated {
Version = 1
};
string databaseName = nameof(SaveEvents_fails_if_db_context_does_not_support_transaction);
DbContextOptions options = new DbContextOptionsBuilder()
.UseInMemoryDatabase(databaseName)
.Options;
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(options),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(new[] { created });
// Assert
action.ShouldThrow <InvalidOperationException>();
}
public async Task SaveEvents_updates_Aggregate_correctly_for_existing_aggregate_id()
{
// Arrange
var userId = Guid.NewGuid();
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
var aggregate = new Aggregate
{
AggregateId = userId,
AggregateType = typeof(FakeUser).FullName,
Version = 1,
};
db.Aggregates.Add(aggregate);
await db.SaveChangesAsync();
}
var usernameChanged = new FakeUsernameChanged();
usernameChanged.Raise(userId, 1);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
await sut.SaveEvents <FakeUser>(new[] { usernameChanged });
// Assert
using (var db = new FakeEventStoreDbContext(_dbContextOptions))
{
Aggregate actual = await db
.Aggregates
.Where(a => a.AggregateId == userId)
.SingleOrDefaultAsync();
actual.Version.Should().Be(usernameChanged.Version);
}
}
public void SaveEvents_succeeds_if_db_context_supports_transaction()
{
// Arrange
var created = new FakeUserCreated {
Version = 1
};
string databaseName = nameof(SaveEvents_succeeds_if_db_context_supports_transaction);
DbContextOptions options = new DbContextOptionsBuilder()
.UseInMemoryDatabase(databaseName)
.ConfigureWarnings(builder => builder.Ignore(InMemoryEventId.TransactionIgnoredWarning))
.Options;
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(new[] { created });
// Assert
action.ShouldNotThrow();
}
public void SaveEvents_fails_if_kind_of_event_raised_time_is_not_utc(DateTimeKind dateTimeKind)
{
// Arrange
var userId = Guid.NewGuid();
var events = new DomainEvent[]
{
new FakeUserCreated(),
new FakeUsernameChanged(),
};
events.Raise(userId);
events.OrderBy(e => e.GetHashCode()).First().RaisedAt = new DateTime(DateTime.Now.Ticks, dateTimeKind);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
// Act
Func <Task> action = () => sut.SaveEvents <FakeUser>(events);
// Assert
action.ShouldThrow <ArgumentException>().Where(x => x.ParamName == "events");
}
public async Task LoadEvents_restores_events_after_specified_version_correctly()
{
// Arrange
var userId = Guid.NewGuid();
var created = new FakeUserCreated();
var usernameChanged = new FakeUsernameChanged();
var events = new DomainEvent[] { created, usernameChanged };
events.Raise(userId);
var sut = new SqlEventStore(
() => new FakeEventStoreDbContext(_dbContextOptions),
new JsonMessageSerializer());
await sut.SaveEvents <FakeUser>(events);
// Act
IEnumerable <IDomainEvent> actual = await sut.LoadEvents <FakeUser>(userId, 1);
// Assert
actual.ShouldAllBeEquivalentTo(events.Skip(1));
}
public void SaveEvents_fails_if_events_contains_null(
FakeUserCreated created)
{
var events = new DomainEvent[] { created, null };
RaiseEvents(userId, created);
Func <Task> action = () => sut.SaveEvents <FakeUser>(events);
action.ShouldThrow <ArgumentException>()
.Where(x => x.ParamName == "events");
}