Add read model state seeding to command scenarios#2315
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Command-scoped code (handlers, validators, Provide methods) can take a read model as a parameter; tests need to control what it contains. Add a Given builder on the command scenario that sets that up two ways: - Given.ForEventSource(id).Events(...) seeds events type-agnostically; any read model the command injects for that source is materialized from them through its own reducer or projection — no read model type is named. - Given.ForEventSource(id).ReadModel(instance) pins a specific instance. Read models resolve through a scenario IReadModels that projects seeded events on demand or returns a pinned instance, keyed by event source id; an unseeded source resolves to null so nullable read model parameters behave as they do in production. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Cover both seeding paths through the real command pipeline and reducer: - events seeding into a handler, a validator (allow and reject), a read model with no parameterless constructor, and one set of events feeding multiple read models - pinned instance into a handler, a Provide method, a validator (allow and reject), and a command targeting a different event source than the seeded one, which resolves to null Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Replace the hand-mocked IReadModels guidance with the Given builder: seed read model state from events or pin an instance. Update the testing extension property tables and add a cross-link from the test-a-command recipe. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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NuGet packages for this PR, e.g. Cratis.Arc: |
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Added
Given.ForEventSource(id).Events(...)materializes any read model the command injects for that source through its own reducer or projection, with no read model type named.Given.ForEventSource(id).ReadModel(instance).