First step of the state-machine refactor. Same self-contained pattern
as the rest of the page — FSMs live inline in web/zebra-spaces.html so
the page-integrity stamp keeps working, and the tests extract them with
the same regex/brace-match technique web-protocol.test.js already uses
(page = source of truth, tests track the page).
Added:
- createFSM(spec): minimal state machine. spec.states[name] has optional
entry/exit hooks and an .on table mapping events → target (string) or
{ target, action }. Observers fire after each transition with
{ state, prev, ev, ctx }. No async in transitions; effects belong in
observers (which can call send() to advance the machine).
- publishSpec: pure transition table for the publish flow.
off ──START──▶ acquiring ──ACQUIRED──▶ negotiating ──NEGOTIATED──▶ live
│ FAILED │ FAILED │ STOP/LOST
▼ ▼ ▼
off stopping ◀──── stopping ──┘
│ DONE
▼
off
One instance per kind (mic / screen / camera). FAILED in negotiating
goes to stopping (not off) so any acquired stream/pc gets torn down.
- test/zebra-fsm.test.js: 23 unit tests covering framework semantics +
publishSpec happy path + error/cancel paths + illegal-transition
no-ops. Function-constructor scope handles const-leak; bare eval()
doesn't expose const declarations to the harness.
- Makefile: test-fsm target + included in test-all.
Next: SubscribeFSM, CallFSM, RemoteTileFSM. Then wire each into the
imperative call sites progressively, replacing the firefighting code.
test/zebra-spaces.test.js — pure Node, four tiers:
1. pure protocol parity: extracts sigJoin/sigAction directly from
web/zebra-spaces.html (so the test tracks the shipped page),
compares produced bytes against fixtures pinned to the Go-side
unit tests in proxy.unturf.com/cmd/zebra-spaces-signal/main_test.go.
If JS drifts from Go by one byte the test fails — exactly the
silent break that would kill promotions in production.
2. ed25519 sign/verify: WebCrypto Ed25519 round-trip + tamper detection,
the same crypto stack the page uses for signed role transitions.
3. vault round-trip: PBKDF2 600k + AES-GCM, mirrors vaultExport/Import
in the page. Verifies wrong-password rejection.
4. live server (optional): if ZEBRA_SPACES_BINARY is set, launches the
relay, dials over real WebSocket, drives full join -> mic-invite ->
accept flow using browser APIs end to end.
Makefile: 'test-zebra-spaces' target auto-builds the relay binary
from ../proxy.unturf.com when present so the live tier runs without
manual setup. 'test-all' now includes it.
Add test/web-protocol.test.js — runs the real protocol code from chat.html in
Node (unit: crc/frame/ACK/HELLO codec, Hamming, Gray; integration: multi-level
modem roundtrip + FEC recovery of off-by-one symbol errors; functional: full
frame -> modem -> FEC -> assembler -> parse + ACK roundtrip). 3348 assertions.
Wired as `make test-web` (also in test-all). Lets us QA the modem without two
devices. Also: retransmit now uses exponential backoff so a lost ACK spaces out
retries instead of hammering the channel.
