Files
david raistrick 4406fd2045 docs: ENCOUNTER_BUILDER + TESTING guides for LLM session handoff
ENCOUNTER_BUILDER.md: DM interface — entity model (campaign/encounter/
participant), build flow (campaign→chars→encounter→participants), combat
controls (start/next/pause/HP/deathsaves/conditions), player display,
1-list turn order model, storage paths quick-ref.

TESTING.md: test+automation ops — commands, suites (90+24+66+4), layers
(L1 mock vs L2 live backend), types, TDD discipline, replay tool,
analyze-turns.js, audit tools, docker stack (single caddy+node container),
dev servers, storage modes, known RED backlog.

Both aimed at another LLM session picking up repo. DEVELOPMENT.md
cross-refs updated.
2026-07-01 19:16:12 -04:00

275 lines
8.5 KiB
Markdown

# Development
TTRPG Initiative Tracker — fork with self-hosted backend. Monorepo via npm workspaces.
## Prerequisites
- Node.js 22+
- npm 10+
## Layout
```
/
package.json # workspaces root
src/ # React frontend (CRA)
App.js # main app (~2900 lines)
storage/ # adapter layer (firebase/ws/memory + contract)
__mocks__/firebase/ # firebase SDK mock (Layer 1 tests)
tests/ # frontend tests
server/ # Backend: generic KV doc store (firebase mirror)
index.js # REST (doc/coll/batch) + WS bootstrap
db.js # SQLite docs table, KV ops, broadcast
tests/ # backend + adapter-vs-live tests
shared/ # Pure logic, no I/O (client + server + tests import)
turn.js # turn-order state machine
tests/ # turn logic tests
scripts/ # manual demo tool (NOT test)
replay-combat.js # live backend demo
tests/
audit/ # exploratory bug-finders (manual, Math.random)
audit-rotation.js # rotation invariant
audit-state.js # 9 invariant classes
scratch/ # gitignored: throwaway repro/exploration
docs/
REWORK_PLAN.md
DEVELOPMENT.md # this file
GLOSSARY.md # domain terms (turn vs round, etc)
ENCOUNTER_BUILDER.md # DM interface guide
TESTING.md # test + automation ops
```
## Setup
```bash
git clone git@github.com:keen99/ttrpg-initiative-tracker.git
cd ttrpg-initiative-tracker
npm install
git config core.hooksPath .githooks # enable pre-push test gate
```
## Run
### Backend (dev)
```bash
npm run server:dev # :4001, db: server/data/tracker.sqlite
# or direct:
DB_PATH=./data/tracker.sqlite PORT=4001 node server/index.js
```
Smoke check:
```bash
curl http://127.0.0.1:4001/health # -> {"ok":true}
```
Never put db in `/tmp` (wipe risk). Use `./data/` (gitignored) or docker volume.
### Frontend (dev server, ws mode)
```bash
REACT_APP_STORAGE=ws \
REACT_APP_BACKEND_URL=http://127.0.0.1:4001 \
REACT_APP_BACKEND_WS=ws://127.0.0.1:4001/ws \
BROWSER=none PORT=3999 \
npm start
```
Opens http://127.0.0.1:3999/. Admin view `/`, player view `/display`.
Firebase mode (default, upstream): set `REACT_APP_FIREBASE_*` in `.env.local` (copy `env.example`). `STORAGE_MODE=firebase` falls through to real SDK.
## Test
### Commands
```bash
npm run test:all # shared + server (fast, no frontend)
npm run shared:test # pure turn logic
npm run server:test # adapter vs live backend
npm test # CRA frontend (src/tests/, slow with scenario)
```
### Suites
| Suite | Location | What | Count |
|---|---|---|---|
| Unit (turn logic) | `shared/tests/` | pure nextTurn, rotation, pause-add | 50 (1 skip) |
| Integration (adapter vs backend) | `server/tests/` | ws adapter through live REST/WS | 23 |
| Characterization (UI) | `src/tests/` | locks current App.js behavior | 62 |
| Scenario | `src/tests/Combat.scenario.test.js` | 100-round full combat (240s) | 289 phases |
Total: 134 green + 1 validated RED (skipped).
### Test types
- **Unit** = pure logic, fast, no I/O. Locks behavior of single functions.
- **Integration** = real backend per test, adapter translation verified.
- **Characterization** = render App via mock, assert current (buggy or not) UI behavior. Not desired-state.
- **Scenario** = end-to-end flow through rendered App, asserts full sequence completes.
- **Contract** = same spec run against every storage impl (memory, ws, firebase). Catches adapter drift.
### Running one file / pattern
```bash
npm test --workspace shared -- --testPathPattern=round-rotation
CI=true npx react-scripts test --watchAll=false src/tests/App.characterization.test.js
```
### Scenario test is slow
`Combat.scenario.test.js` runs 100 combat rounds through rendered App — 240s timeout by design. Skip when iterating:
```bash
CI=true npx react-scripts test --watchAll=false --testPathIgnorePatterns="Combat.scenario"
```
## Demo tool (NOT test)
`scripts/replay-combat.js` = live backend demo. Watch UI react to state changes.
```bash
# start backend + frontend first
node scripts/replay-combat.js [rounds] [delayMs]
# defaults: 100 rounds, 200ms/step
```
Coverage per round: damage, heal, all 22 conditions, toggleActive,
removeParticipant, addParticipant (reinforcements), updateParticipant,
pause/resume, reorderParticipants, endEncounter. Revives dead each round
to sustain full round count.
## Audit tools (NOT unit tests)
`tests/audit/` = exploratory, Math.random, non-deterministic. Manual run.
Unit tests (`{shared,server,src}/tests/`) lock known bugs deterministically.
### audit-rotation.js
Pure turn.js simulation of replay op sequence. Detects rotation violations
(skip/dupe per round). Found BUG-1 (addParticipant + pause corrupts rotation).
```bash
node tests/audit/audit-rotation.js
```
Bisect: comment/uncomment op blocks to isolate triggering combo.
### audit-state.js
Runs pure turn.js combat, audits 9 invariant classes per round:
1. rotation integrity (skip/dupe)
2. HP bounds (0 ≤ hp ≤ max, no NaN)
3. isActive consistency (dead = inactive)
4. turnOrder no dup ids
5. turnOrder ids all active
6. currentTurn valid + active
7. deathSave range (0 ≤ saves ≤ 3, reset on revive)
8. removeParticipant orphans
9. undo support
```bash
node tests/audit/audit-state.js [rounds] # default 100
```
Current state (post BUG-1/2 fix): 0 violations / 100 rounds.
See `TODO.md` for known bugs.
## Scratch
`scratch/` = gitignored throwaway. Repro scripts, exploration, debug.
Not committed. Use freely, delete anytime.
## Build
```bash
npm run build # CRA production build -> build/
```
Docker build (existing, frontend-only):
```bash
docker build -t ttrpg-initiative-tracker .
docker run -p 8080:80 --rm ttrpg-initiative-tracker
```
Full-stack docker-compose arrives in M5.
## Storage architecture
### Generic KV doc store
Backend = firebase mirror. Single `docs` table: `path` (PK), `parent`, `data` (JSON), `updated_at`. Opaque JSON at arbitrary path strings. No shape-specific endpoints. App logic stays client-side.
```
Client (browser) Server
| |
|-- storage.setDoc(path,data) -->| REST PUT /api/doc
|<---- 200 ----------------------|
| |
|-- storage.subscribeDoc(path) -->| WS subscribe
|<---- WS {initial} --------------| immediate value
| ... |
|<---- WS {change} --------------| on any write to path
| |
Display / tablet |
|<---- WS {change} --------------| same push
```
### Path normalization
App passes firebase-prefixed paths (`artifacts/{APP_ID}/public/data/campaigns/...`). Adapter `norm()` strips prefix → bare canonical (`campaigns/...`). All impls share identity (contract test).
### STORAGE_MODE flow
`getStorageMode()` reads `REACT_APP_STORAGE` env (default `firebase`).
- `firebase` → real SDK init
- `ws`/`memory` → stub auth + db sentinel, route via `storage.*` adapter
## Test layers
- **Layer 1**: App vs firebase mock. Proves adapter call shape. Never exercises ws adapter.
- **Layer 2**: ws adapter vs live backend. Proves translation + path identity.
Both required — Layer 1 alone misses adapter bugs (path mismatch, no-op players, ws.on EventEmitter vs browser handlers).
## Local pipeline (pre-push hook)
Private repo = no free GitHub Actions. Tests run locally via git hook.
`.githooks/pre-push` runs `npm run test:all` (shared + server, fast). Frontend tests not gated (slow).
Skip:
```bash
git push --no-verify
```
Already configured on this checkout after `git config core.hooksPath .githooks`.
## Status
| Milestone | State |
|---|---|
| 0 repo/branch | ✅ done |
| 1 backend + tests | ✅ done |
| 2 frontend WS adapter | ✅ done |
| 3 characterization tests | ✅ done (134 green) |
| 4 skip fix + manual override | ⬜ next |
| 5 docker compose | ⬜ |
| 6 undo rework | ⬜ |
| 7 playwright e2e | ⬜ deferred |
See `docs/REWORK_PLAN.md` for full plan, `TODO.md` for known bugs.
## Git
- `origin` = `github.com:keen99/ttrpg-initiative-tracker` (this fork)
- `upstream` = `code.draft13.com/robert/ttrpg-initiative-tracker` (friend's Gitea, read-only)
- work branch: `rework-backend` (off `main`)
```bash
git fetch upstream # pull friend's changes
git merge upstream/main # rebase our branch onto his
```