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Stage 6: gateway edge (Connect/FlatBuffers over h2c, platform/email/guest auth, sessions, rate-limit, admin passthrough, live push bridge)
New public ingress and the first network edge. Framework + a vertical slice of
operations end-to-end; remaining ops reuse the same transcode pattern in Stage 7.

Contracts (new module scrabble/pkg):
- push.proto (backend->gateway gRPC server-stream) + scrabble.fbs (FlatBuffers
  edge payloads), committed generated Go; buf/flatc Makefiles (dev-time codegen).

Backend:
- REST handlers on the /api/v1 groups: internal session endpoints
  (telegram/guest/email login -> mint, resolve, revoke) and the user slice
  (profile, submit_play, state, lobby enqueue/poll, chat).
- internal/notify in-process Publisher hub + internal/pushgrpc gRPC server
  (BACKEND_GRPC_ADDR) streaming your_turn/opponent_moved/chat/nudge/match_found;
  emission in game.commit, social, matchmaker.
- migration 00005 accounts.is_guest; guests are durable rows excluded from stats;
  ProvisionGuest; email-as-login (RequestLoginCode/LoginWithCode).

Gateway (new module scrabble/gateway):
- Connect Gateway service over h2c (Execute + Subscribe), FlatBuffers<->JSON
  transcode registry, Telegram initData HMAC validator (seam), session cache,
  token-bucket rate limiter (3 classes), push fan-out hub, backend REST + push
  gRPC client, admin Basic-Auth reverse proxy.

go.work: use ./pkg, ./gateway + replace scrabble/pkg. CI: gateway/**, pkg/**
path filters; unit build/vet/test span all three modules. Docs (PLAN,
ARCHITECTURE, FUNCTIONAL+ru, TESTING, READMEs) updated; gateway/pkg unit tests +
guest/email-login integration tests.
2026-06-02 22:38:24 +02:00

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Markdown

# Scrabble Game — Testing
How the project is tested and the gate every stage must pass. Read before adding
tests or touching CI.
## Layers
- **Go unit tests** — table-driven where it helps; `testing` + standard library.
Every functional change ships with regression coverage. Run:
`go test -count=1 ./backend/... ./pkg/... ./gateway/...` (the module list grows
with the workspace).
- **Integration** *(Stage 1+)* — Postgres-backed tests behind the `integration`
build tag spin a throwaway `postgres:17-alpine` via `testcontainers-go`. They
live in `backend/internal/inttest` and run with
`go test -tags=integration -count=1 -p=1 ./backend/...` (needs Docker), guarded
by a separate CI workflow (`integration.yaml`; Ryuk disabled, serial). Slow.
- **UI** *(introduced with the UI in Stage 7)* — Vitest (unit) + Playwright
(e2e), mirroring the chosen plain-Svelte + Vite toolchain.
- **Engine** *(Stage 2+)* — correctness of scoring and move generation is owned
by `scrabble-solver`'s own GCG-backed tests. `backend/internal/engine` adds, on
top of the embedded solver: per-variant smoke tests (load all three committed
DAWGs and validate a known word, including Эрудит), bag draw/return determinism
and exchange accounting, the `Game` end-conditions (empty bag with an empty
rack, and six scoreless turns) with end-game rack scoring, and
**dictionary-independent history replay** (`ReplayBoard` reproduces a full
greedy game's final board from decoded records alone), and the **resignation
win/loss rule** (the resigner keeps their score yet loses). The engine tests
read the DAWGs from `BACKEND_DICT_DIR` (or the sibling `scrabble-solver`
checkout) and fail loudly when it is absent.
- **Game domain** *(Stage 3+)*`backend/internal/game` adds pure unit tests
(the GCG writer, the away-window / effective-deadline boundaries, the hint
budget, the live-game cache and per-game lock, payload round-trips) plus
Postgres-backed integration tests in `inttest` (full lifecycle to a natural
end, **journal-replay equivalence**, the turn-timeout sweep with away-window
grace, resign win/loss and statistics, the hint allowance-then-wallet policy,
word-check and complaint capture, and per-game-lock serialisation). Stage 4 adds
the engine's **multi-player drop-out** cases (continue after one resign,
last-survivor win, the tile-disposition bag effect) and a domain integration test
for a 3-player **timeout that continues**. The engine also gains a `Candidates`
ranked/decoded test (Stage 5).
- **Social & lobby** *(Stage 4+)*`backend/internal/social` unit-tests the chat
**content filter** (links/emails/phones plus obfuscated forms) and
`backend/internal/lobby` unit-tests the in-memory **matchmaker** (FIFO pairing,
cancel, per-variant pools, plus the Stage 5 **robot substitution** reaper and
`Poll` delivery) with fake game-creator and robot-provider seams. Postgres-backed
`inttest` covers the friend request/accept lifecycle with the block/toggle guards,
the per-user block (and its severing of friendships), chat post/list with the IP,
content and block-visibility rules, the nudge turn/rate-limit rules, the
invitation flow (all-accept starts the game, decline cancels, lazy expiry,
inviter-only cancel), and the email confirm-code flow (request/confirm, taken
email, expiry and attempt-cap) with a fixture mailer.
- **Robot** *(Stage 5+)*`backend/internal/robot` unit-tests the pure strategy:
the ≈ 40% play-to-win split over many seeds, the right-skewed move-delay
(bounds, ~10-min median, determinism), the margin selection (win/lose, in-band
and out-of-band fallbacks, no-play exchange/pass), the sleep window with drift
and the midnight wrap, and mix restart-stability. Postgres-backed `inttest`
drives a robot through a full auto-match to a natural end (asserting a robot
statistics row), the matchmaker substitution end-to-end (enqueue → reap →
`[human, robot]`, discoverable via `Poll`), and a proactive 12-hour nudge.
- **Gateway & contracts** *(Stage 6+)*`backend/internal/notify` unit-tests the
hub fan-out (delivery, overflow drop, unsubscribe) and the FlatBuffers event
constructors (payload round-trip). `gateway/...` unit-tests are hermetic (no
real network — an `httptest` fake backend and fixtures): the Telegram initData
HMAC validator (genuine, tampered, wrong-token, stale), the session cache
(hit/miss/fallback, TTL re-resolve, invalidate), the rate limiter (burst,
per-key isolation, per-window), the push hub (per-user routing, overflow,
unsubscribe), the transcode round-trips (FlatBuffers↔JSON, X-User-ID
forwarding, nested GameView, domain-code surfacing), the admin Basic-Auth
reverse proxy (401 / forward), and a full Connect `Execute` path end to end
(guest auth, unauthenticated rejection, unknown message type). The backend gains
the **guest** lifecycle (a guest plays an auto-match to a natural end yet accrues
no statistics) and the **email-as-login** flow (request/verify, returning user)
in `inttest`.
## Principles
- A green run must not depend on cached state: use `-count=1` in CI.
- Tests that need infrastructure fail loudly (`t.Fatal`) when it is unavailable
rather than silently skipping coverage.
- No network or real platform calls in unit tests; validate platform
credentials behind an interface seam and test with fixtures.
## Per-stage CI gate
Every completed stage is exercised on `gitea.iliadenisov.ru` before it is marked
done in [`../PLAN.md`](../PLAN.md):
1. Commit the stage on its `feature/*` branch.
2. Push to `origin`.
3. Watch the run to completion — never hand-roll a poll loop:
`python3 ~/.claude/bin/gitea-ci-watch.py` (launch in the background).
4. Only after every workflow that fired is green may the stage be marked done.