JasperFx.Events.ComplianceTests

JasperFx.Events.ComplianceTests

Shared behavioral compliance test suites for Critter Stack event stores — the same event sourcing expectations asserted against Marten (PostgreSQL), Polecat (SQL Server), and any future store built on JasperFx.Events.

This package ships C# source, not a compiled assembly. That is forced, not a preference: JasperFx.Events.SourceGenerator emits aggregate dispatchers per consuming assembly and binds each product's own session type, so the shared aggregates have to be compiled inside each consumer. Compiling in the consumer also sidesteps package-version skew and LangVersion/ImplicitUsings differences between the repos.

Using it

Reference the package from a test project that already has xunit v3 and Shouldly, then supply two things.

1. A global alias naming your store's read session. The shared self-aggregating fixtures declare EvolveAsync(IEvent, ComplianceQuerySession); the source generator resolves the parameter by type name, so an alias is enough:

global using ComplianceQuerySession = Marten.IQuerySession;

2. A concrete fixture closing EventStoreComplianceFixture<TOperations, TQuerySession> over your store's session pair. Everything portable in the suites runs through the shared JasperFx surfaces (IEventStoreOperations, IEventRegistry, IProjectionDaemon); the fixture only has to supply what no shared interface declares — store construction from a ComplianceStoreConfig, session acquisition, SaveChangesAsync, document load-back, batched DCB queries, and teardown.

Then enroll each suite with an empty subclass:

public class dcb_tag_query_and_consistency_compliance
    : DcbTagQueryAndConsistencyCompliance<MyComplianceFixture, IDocumentOperations, IQuerySession>;

Capability gates

Where a store genuinely cannot support a behavior, override the virtual bool Supports... flags on the fixture; the affected tests skip rather than fail. Gates are meant to be temporary and tracked — a suite failing on your store is usually a product bug, not a test to soften.