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_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.Fail("We're expecting concurrency exceptions!");
}
}
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());
}
}
