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register-referentie/docs/architecture/adr-0006-integration-test-provisioning.md
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ci(acl): run the ACL integration test in CI inside the compose network (closes #55) (refs #46)
The hosted runner can't reach the stack's published ports (sibling containers),
so run the seed and the test as containers joined to the OpenZaak network,
reaching it by container IP — a single-label host like 'openzaak' isn't URL-valid
for OpenZaak's own URLValidator, but an IPv4 literal is. Code is delivered via
image build / docker cp (bind mounts don't reach the daemon either).

- infra/run-integration.sh: up -> wait healthy (docker inspect) -> seed published
  zaaktype (python container on the net) -> build + run the test image on the net
  -> always tear down. Plain docker primitives only (portable docker/podman).
- services/acl/Dockerfile.integration: builds + runs Acl.IntegrationTests; dotnet
  lives in the image, so the CI job needs only Docker (no setup-dotnet).
- make integration now delegates to the script; re-added the Gitea Actions job.

Supersedes the local-only gap documented earlier; #55 is no longer needed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-29 12:28:43 +02:00

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# ADR-0006: Provision the ACL integration test against the compose stack
- **Status:** Accepted
- **Date:** 2026-06-29
- **Deciders:** Respellion engineering
- **Relates to:** S-04a (#46); proposed in #53; builds on ADR-0001 (loose coupling), ADR-0002 (catalogus design), ADR-0003 (default-fill); supports CLAUDE.md §11 (integration tests via real containers)
## Context
S-04 delivered the ACL's one operation — `OpenZaakGateway.OpenZaakAsync` — with unit
tests against a stubbed `HttpMessageHandler` and a Reqnroll scenario over an in-memory
stand-in. The deferred S-04 acceptance criterion (S-04a) is the one a stub cannot meet:
> Integration test using Testcontainers against real OpenZaak passes.
The test must drive the gateway against a **real** OpenZaak — real ZGW JWT auth, the real
`POST /zaken/api/v1/zaken` contract, real CRS handling — and assert a zaak comes back.
Two ways to stand OpenZaak up were considered (the issue's open question): (a) a full
**Testcontainers** graph started by the test, or (b) target the **running compose stack**
the repo already defines (`infra/openzaak/docker-compose.yml`, `make openzaak-up`).
Investigation reversed the initially-favoured Testcontainers option:
1. **Testcontainers .NET has no docker-compose support.** OpenZaak needs PostGIS + Redis +
a `setup_configuration` one-shot (the JWT client) + the API. Honouring "full graph" would
mean re-implementing that five-service stack — init ordering, the config volume, health
gating — by hand in C#, duplicating the maintained compose file and rotting with it. That
rubs against CLAUDE.md §13 ("if a test is hard to write, the design is wrong").
2. **The test cannot be hermetic anyway.** OpenZaak's Zaken API rejects a zaak against a
*concept* zaaktype (`not-published`), and a *published* zaaktype requires ≥1 resultaattype,
which OpenZaak validates by fetching the external **Selectielijst** reference API
(`selectielijst.openzaak.nl`). So a real zaak POST already depends on outbound internet
from the OpenZaak container — the self-containment that motivated Testcontainers is lost
regardless of how the containers are started.
## Decision
**The ACL integration test targets the running compose stack; it does not start containers
itself. No new test dependency is added.**
- A gated test project `Acl.IntegrationTests` (`[Trait("Category","Integration")]`) talks to
OpenZaak with a plain `HttpClient`, reusing the same endpoint + JWT-client config the seed
uses (`OZ_BASE` / `OZ_CLIENT_ID` / `OZ_SECRET`, defaulting to the local stack). It locates
the published `BIG-REGISTRATIE` zaaktype via the Catalogi API and exercises the real
`OpenZaakGateway` against it.
- **The lane is kept out of the fast checks.** `make unit` runs with
`--filter "Category!=Integration"`; Stryker is pinned to `Acl.Tests` (`test-projects`), so
neither the unit nor the mutation lane needs a live stack. A new `make integration` target
(`infra/run-integration.sh`) brings the stack up, seeds, runs the lane, and always tears down
— mirrored by a Gitea Actions `integration` job. This matches `make` being the single source
of truth (ADR-0005).
- **Publishing is opt-in in the seed.** `infra/openzaak/seed_catalogus.py` gains an
`OZ_PUBLISH=1` path that adds the relations OpenZaak's publish requires — two statustypen
(begin/eind), a roltype, and a resultaattype whose Selectielijst procestype is matched onto
the zaaktype — then publishes. The default seed (S-01 / ADR-0002) still leaves the zaaktype
a concept; only `make integration` flips the switch.
## Consequences
- **Positive:** a small, honest test over the real ZGW contract with no bespoke orchestration
to maintain; the compose stack is exercised exactly as operators run it; no new dependency.
- **It caught a real bug.** The gateway sent the zaak body via `JsonContent` without a
`Content-Length`, so .NET framed it as `Transfer-Encoding: chunked`, which OpenZaak's uwsgi
rejects with 400. A stubbed handler accepts either framing, so only a real OpenZaak surfaced
it. Fixed by buffering the body (`LoadIntoBufferAsync`); guarded in the fast lane by a unit
test asserting a `Content-Length` is set. This is the concrete justification for §11's
integration tier.
- **External dependency:** the integration job needs the OpenZaak container to reach
`selectielijst.openzaak.nl`. It is a stable public reference API (the same one OpenZaak uses
in production) but it is a network touchpoint, and a CI environment without egress would need
a local Selectielijst service or a recorded fixture. `OZ_SELECTIELIJST` overrides the base URL.
- **Cost:** the lane needs the stack up first, so it is separate from the fast lanes.
- **Runs on the hosted runner.** A process *on* the runner can't reach the stack's published
ports (Compose starts sibling containers via the host daemon — gitea-actions-gotchas.md §5,
same split as §1), so `infra/run-integration.sh` runs both the seed and the test as containers
*joined to the OpenZaak network*, reaching it by **container IP** (a single-label host like
`openzaak` isn't URL-valid for OpenZaak's own `URLValidator`; an IPv4 literal is). Code is
delivered by image build / `docker cp`, never bind mounts. The CI job therefore needs only
Docker — no `setup-dotnet`. (This closed the follow-up that was originally split out as #55.)
## Alternatives considered
- **Full Testcontainers graph** — rejected: re-implements the compose stack in C# (brittle,
duplicative) for no hermeticity gain, since the Selectielijst dependency remains.
- **Single OpenZaak container (sqlite/locmem)** — rejected: diverges from the real
PostGIS-backed, Redis-cached deployment; the Zaken API is a geo API and the divergence would
undermine the contract the test exists to verify.
- **Mock OpenZaak / record-replay** — rejected: that is what the existing stubbed-handler unit
tests already do; it cannot exercise the real contract, and would not have caught the chunked
body bug.