public void Storing_event_source_should_succeed()
{
var targetStore = new MsSqlServerEventStore(connectionString);
var theEventSourceId = Guid.NewGuid();
var theCommitId = Guid.NewGuid();
var eventStream = Prepare.Events(
new CustomerCreatedEvent("Foo", 35),
new CustomerNameChanged("Name" + 2),
new CustomerNameChanged("Name" + 3),
new CustomerNameChanged("Name" + 4))
.ForSourceUncomitted(theEventSourceId, theCommitId);
targetStore.Store(eventStream);
var eventsFromStore = targetStore.ReadFrom(theEventSourceId, long.MinValue, long.MaxValue);
eventsFromStore.Count().Should().Be(eventStream.Count());
for (int i = 0; i < eventsFromStore.Count(); i++)
{
var uncommittedEvent = eventStream.ElementAt(i);
var committedEvent = eventsFromStore.ElementAt(i);
committedEvent.EventSourceId.Should().Be(uncommittedEvent.EventSourceId);
committedEvent.EventIdentifier.Should().Be(uncommittedEvent.EventIdentifier);
committedEvent.EventSequence.Should().Be(uncommittedEvent.EventSequence);
committedEvent.Payload.GetType().Should().Be(uncommittedEvent.Payload.GetType());
}
}
public void Saving_with_concurrent_event_adds_should_not_be_causing_deadlocks()
{
// test created in response to an issue with high frequency adds causing deadlocks on the EventSource table.
// I reworked the sequencing of reads/updates to the EventSource table to reduce the amount
// of time to any locks will be held. But this wasn't strictly required as the problem resided
// in the fact that there was no index on the event source table result in full table scans occuring.
// I therefore also changed the DDL to incude an non clustered index on EventSource.Id which resulted
// in a nice performance boost during informal testing.
var targetStore = new MsSqlServerEventStore(connectionString);
var tasks = new Task[30]; // this number require to reproduce the issue might vary depending on hardware
for (int idx = 0; idx < tasks.Length; idx++)
{
tasks[idx] = Task.Factory.StartNew(() =>
{
var theEventSourceId = Guid.NewGuid();
var theCommitId = Guid.NewGuid();
var eventStream = Prepare.Events(new CustomerCreatedEvent(Task.CurrentId.ToString(), 35))
.ForSourceUncomitted(theEventSourceId, theCommitId);
// should not be receiving a deadlock
targetStore.Store(eventStream);
});
}
Task.WaitAll(tasks);
}
public void it_should_throw_a_concurrency_exception()
{
var eventStream = Prepare.Events(new AccountTitleChangedEvent("Title"))
.ForSourceUncomitted(EventSourceId, Guid.NewGuid());
EventStore.Store(eventStream);
}
protected override IEnumerable <SourcedEvent> Given()
{
return(Prepare.Events
(
new NewProjectCreated(TheId, OldName, "myproject")
)
.ForSource(TheId));
}
public void it_should_throw_a_concurrency_exception()
{
var eventStream = Prepare.Events(new AccountTitleChangedEvent("Title"))
.ForSourceUncomitted(EventSourceId, Guid.NewGuid());
ConcurrencyException ex = Assert.Throws <ConcurrencyException>(() => EventStore.Store(eventStream));
Assert.NotNull(ex);
}
protected override IEnumerable <SourcedEvent> Given()
{
return(Prepare.Events
(
new NewProjectCreated(TheProjectId, "My Project", "myproject"),
new MemberAddedToProject(TheMemberId)
)
.ForSource(TheProjectId));
}
public void Loading_it_from_history_should_apply_all_events()
{
var aggId = Guid.NewGuid();
var stream = Prepare.Events(new HandledEvent(), new HandledEvent(), new HandledEvent()).ForSource(aggId);
var theAggregate = new MyAggregateRoot(aggId);
theAggregate.InitializeFromHistory(stream);
theAggregate.FooEventHandlerInvokeCount.Should().Be(3);
}
public void Init_should_set_From_and_To_version_information()
{
var sourceId = Guid.NewGuid();
var eventObjects = new[] { new Object(), new Object(), new Object() };
var committedEvents = Prepare.Events(eventObjects).ForSource(sourceId, 5).ToList();
var sut = new CommittedEventStream(sourceId, committedEvents);
sut.FromVersion.Should().Be(committedEvents.First().EventSequence);
sut.ToVersion.Should().Be(committedEvents.Last().EventSequence);
}
public void Saving_with_concurrent_event_edits_should_be_subject_to_concurrency_checks()
{
// test created in response to an issue with concurrent edits happening within the window between
// reading the current version number of the aggregate and the event source record being updated with
// the new version number. this would leave the event stream for an event source out of sequence and
// the aggregate in a state in which it could not be retrieved :o
var concurrencyExceptionThrown = false;
var targetStore = new MsSqlServerEventStore(connectionString);
var theEventSourceId = Guid.NewGuid();
var theCommitId = Guid.NewGuid();
// make sure that the event source for the aggregate is created
var creationEvent = Prepare.Events(new CustomerCreatedEvent("Foo", 35))
.ForSourceUncomitted(theEventSourceId, theCommitId);
targetStore.Store(creationEvent);
var tasks = new Task[130];
// now simulate concurreny updates coming in on the same aggregate
for (int idx = 0; idx < tasks.Length; idx++)
{
tasks[idx] = Task.Factory.StartNew(() =>
{
var changeEvent = new CustomerNameChanged(DateTime.Now.Ticks.ToString())
{
CustomerId = theEventSourceId
};
var eventStream = Prepare.Events(changeEvent)
.ForSourceUncomitted(theEventSourceId, Guid.NewGuid(), 2);
try
{
targetStore.Store(eventStream);
}
catch (ConcurrencyException)
{
concurrencyExceptionThrown = true;
}
targetStore.ReadFrom(theEventSourceId, long.MinValue, long.MaxValue);
});
}
Task.WaitAll(tasks);
if (concurrencyExceptionThrown == false)
{
Assert.True(false, "We're expecting concurrency exceptions!");
}
}
public NoDBEventStoreTestFixture()
{
EventStore = new NoDBEventStore("./NoDBTests/" + GetType().Name);
EventSourceId = Guid.NewGuid();
Guid entityId = Guid.NewGuid();
Events = new object[] { new AccountTitleChangedEvent("Title") };
var eventStream = Prepare.Events(Events)
.ForSourceUncomitted(EventSourceId, Guid.NewGuid());
EventStore.Store(eventStream);
}
public void It_could_not_be_loaded_from_history_when_it_already_contains_uncommitted_events()
{
var theAggregate = new MyAggregateRoot();
theAggregate.MethodThatCausesAnEventThatHasAHandler();
theAggregate.MethodThatCausesAnEventThatHasAHandler();
var stream = Prepare.Events(new HandledEvent(), new HandledEvent()).ForSource(theAggregate.EventSourceId);
Action act = () => theAggregate.InitializeFromHistory(stream);
act.ShouldThrow <InvalidOperationException>();
}
public void Storing_empty_event_stream_should_not_throw()
{
var targetStore = new MsSqlServerEventStore(connectionString);
var theEventSourceId = Guid.NewGuid();
var theCommitId = Guid.NewGuid();
var eventStream = Prepare.Events(new object[0])
.ForSourceUncomitted(theEventSourceId, theCommitId);
targetStore.Store(eventStream);
Assert.True(true);
}
public void When_constructing_it_with_events_where_one_has_an_incorrect_event_source_id_it_should_throw_argument_exception()
{
var sourceId = Guid.NewGuid();
var eventObjects = new[] { new Object(), new Object(), new Object() };
var committedEvents = Prepare.Events(eventObjects).ForSource(sourceId).ToList();
var lastEvent = committedEvents.Last();
var incorrectSourceId = Guid.NewGuid();
var incorrectEvent = new CommittedEvent(lastEvent.CommitId, lastEvent.EventIdentifier, incorrectSourceId, lastEvent.EventSequence, lastEvent.EventTimeStamp, lastEvent.Payload, lastEvent.EventVersion);
committedEvents[committedEvents.Count - 1] = incorrectEvent;
Action act = () => new CommittedEventStream(sourceId, committedEvents);
act.ShouldThrow <ArgumentException>();
}
public void Storing_entity_sourced_event_should_preserve_entity_id()
{
var targetStore = new MsSqlServerEventStore(connectionString);
var theEventSourceId = Guid.NewGuid();
var theCommitId = Guid.NewGuid();
var theEntityId = Guid.NewGuid();
var eventStream = Prepare.Events(new AccountNameChangedEvent(theEntityId, "NewName"))
.ForSourceUncomitted(theEventSourceId, theCommitId);
targetStore.Store(eventStream);
var restoredEvent = targetStore.ReadFrom(theEventSourceId, long.MinValue, long.MaxValue).Single();
var payload = (AccountNameChangedEvent)restoredEvent.Payload;
payload.EntityId.Should().Be(theEntityId);
}
public void Saving_snapshot_should_not_throw_an_exception_when_snapshot_is_valid()
{
var targetStore = new MsSqlServerEventStore(connectionString);
var anId = Guid.NewGuid();
var aCommitId = Guid.NewGuid();
var aVersion = 12;
var eventStream = Prepare.Events(new object())
.ForSourceUncomitted(anId, aCommitId);
var snapshot = new Snapshot(anId, aVersion, new MySnapshot());
targetStore.Store(eventStream);
targetStore.SaveSnapshot(snapshot);
var savedSnapshot = targetStore.GetSnapshot(anId, long.MaxValue);
savedSnapshot.EventSourceId.Should().Be(anId);
savedSnapshot.Version.Should().Be(aVersion);
}