e2e/

e2e — declarative end-to-end suites (Venom)

This directory holds the declarative e2e suites for the Lima/containerd lanes, written for OVH Venom (Apache-2.0). Venom is the invoke phase of the lanes: the VM self-deploys (Lima provisioning), then Venom drives the assertions. It replaced the hand-written scripts/lima-*-invoke.sh bash scripts.

What's here

• kv-counter.venom.yml — the KV containerd lane (ADR-0069/0076). Proves two properties declaratively:
  1. binding-as-read-grant — each counter (nodejs22 + python314) reads 1→2 with no read Policy.
  2. fail-closed — applying examples/kv-counter/counter-unbound.yaml (in pyvvo/funcd-typescript) (the same config minus spec.kv) makes context.kv.get Forbidden (bound-only, not default-allow).
• fn-to-fn.venom.yml — the fn-to-fn link lane (ADR-0064/0058). Proves: front invokes greeter (the link is the capability); a missing name makes greeter's contract reject (422) and that 422 propagates back through front; a bad-typed greeter call hits the contract gate (422) before the handler; and only the linked caller (front) has an invoke socket.
• metastore.venom.yml — the metastore durability lane (ADR-0065). The exec-shaped lane: not data-plane http but a daemon-lifecycle test — start funcd (containerd + file/Badger metastore), apply a Config, restart the daemon, and prove the Config is recovered from the durable metastore. Every step is an in-VM exec (the suite starts the daemon itself); the wait is retry on the exec steps (no poll loop, no host port-forwarding). Fixtures in e2e/fixtures/.

Run it

just lima-example-kv     # boots the self-deploying VM, then runs this suite

Venom is obtained via the flake's pinned Go toolchain (go run github.com/ovh/venom/cmd/venom@v1.3.0); a follow-up ADR would pin it as a buildGoModule flake input (Venom is not in nixpkgs). Venom runs from the scratch dir so its venom.log lands outside the repo; *.log is also gitignored.

Shape (what the spike settled)

• HTTP assertions (result.bodyjson.count ShouldEqual 2) read far better than curl | python -c, and retry/delay replace hand-rolled readiness/redeploy polling — so there is no helper script: the positive testcases are http steps; the fail-closed mutation is one inline exec line and the wait is the negative http step's retry/delay.
• Mutations run IN the VM, not host-side. The one exec step does limactl shell {{.vm}} -- sudo … funcdctl apply -f /opt/kv-counter/counter-unbound.yaml — co-located with the daemon. An earlier attempt drove the apply host-side over the forwarded control-plane port and raced the redeploy (the old sandbox served the binding until the new revision was Ready, so the read stayed 200). Co-locating the mutation fixes it; the assertion stays host-side over the forwarded data-plane port. So the "mutation is Venom's weak spot" worry was a host-side-execution artifact, not a Venom limit — it expresses the full positive + negative suite.
• {{.vm}} is injected by the recipe (--var) so no machine-specific path lives in this tracked file; the in-VM deploy path (/opt/kv-counter/…) is the lane's own convention (see scripts/lima-kv.yaml).

A follow-up ADR would pin Venom in the flake and (optionally) convert the other lanes (scripts/lima-fn-to-fn-invoke.sh, …) the same way.