Release v19.40.0

Summary

The in-process testing scenarios (EventScenario, ReadModelScenario, ReactorScenario and EventStoreForTesting) now run on Chronicle's production in-memory storage instead of hand-written test doubles, so they behave like a real event store in more of the places your specifications depend on.

Added

• EventScenario constructors that take an explicit event sequence, event store and namespace, and still discover the constraints your application declares: new EventScenario(sequenceId, eventStore, @namespace) and new EventScenario(defaults, sequenceId, eventStore, @namespace). Passing an explicit null constraint provider to the existing constructor still means no constraints (#4520)
• ReadModelScenario, ReactorScenario and EventStoreForTesting implement IDisposable, like EventScenario. Dispose a scenario to release its in-memory event store, for example from your specification's Destroy()

Changed

• Testing scenarios share one in-memory event store per scenario. The event log and any named event sequence you append to see the same data, and kernel services that used to throw NotSupportedException in a scenario now answer from that store. For example, the admin password status now reports that no admin password is required (#3434)
• An event appended in an older generation is migrated through your registered event type migrations (EventTypeMigration<TUpgrade, TPrevious>) and stored in every generation, in EventScenario as well as in the events you seed into ReadModelScenario. Read models and reducers now see the migrated values (part of #3941)
• EventStoreForTesting enforces closes-stream constraints, as EventScenario already did
• Concurrent appends to one event sequence in a scenario run one at a time, the way the kernel processes them. Two concurrent appends of the same [Unique] value can no longer both succeed
• An event type or generation your scenario did not discover still fails with EventSchemaNotDiscovered. A constraint type the kernel does not know now fails explicitly instead of being ignored