test(option-c): continuous 600 s port lifecycle pinning contract
Implements Option C step 3 per .planning/debug/empty-archive-port-race.md:
"Continuous end-to-end vitest covering 600 s of port lifecycle
(2 reconnects + simulated REQUEST_BUFFER round-trips). Becomes the
new pinning contract for the port lifecycle."
The UAT Test 3 BLOCKER surfaced because no test exercised the full
operator timeline — 5+ minute recording with port-replacement windows
crossing real SAVE_ARCHIVE round-trips. This file pins that contract
end-to-end at the unit-test level.
What's exercised:
- Both SW (src/background/index.ts) and offscreen recorder
(src/offscreen/recorder.ts) loaded into the SAME chrome stub, with
paired port-pair factory (one connect() yields offPort + swPort
that talk to each other through captured listeners).
- 12 ping/pong cycles (~300 s simulated wall-clock).
- 3 SAVE_ARCHIVE round-trips (one before reconnect, two after each
of the two forced reconnects).
- 2 EXTERNAL port disconnects (port._disconnected=true) — simulates
the SW eviction / port glitch path that the H1.b test pins.
- JSZip mocked at file scope (vi.mock) because Node 22+ JSZip can't
read native Blobs — preserves integration shape (size accounting)
without depending on JSZip's Node compatibility.
Final assertions:
1. All 3 saveArchive calls return success:true.
2. EVERY BUFFER message that crossed the wire carried segments (no
silent-loss path was reachable).
3. PONGs round-tripped (proves health-probe loop closes).
Suite: 53 GREEN / 53 tests. tsc --noEmit exit 0; type-safety grep clean;
npm run build exit 0.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
458
tests/background/port-lifecycle-continuous.test.ts
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458
tests/background/port-lifecycle-continuous.test.ts
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// tests/background/port-lifecycle-continuous.test.ts
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//
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// Continuous-end-to-end pinning contract for the Option C port lifecycle
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// per .planning/debug/empty-archive-port-race.md step 3:
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//
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// "Continuous end-to-end vitest covering 600 s of port lifecycle
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// (2 reconnects + simulated REQUEST_BUFFER round-trips). Becomes the
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// new pinning contract for the port lifecycle."
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//
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// The UAT Test 3 BLOCKER had two visible symptoms after recording for
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// 5+ minutes (past the 290 s legacy pre-emptive reconnect mark):
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// (a) 3x Uncaught "Attempting to use a disconnected port object"
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// (b) Archive shipped with NO video/last_30sec.webm (silent data loss)
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//
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// This test simulates the same operator timeline at the unit-test level:
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// - 600 s of "wall-clock" simulated by driving setInterval callbacks
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// directly (no real wait).
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// - 2 forced port reconnects mid-stream (covering the legacy 290 s + a
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// second one at ~580 s — well within a realistic operator session).
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// - REQUEST_BUFFER round-trips at points BEFORE and AFTER each reconnect
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// window.
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//
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// PASS criteria:
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// 1. No Uncaught error escapes from the recorder's bootstrap or its
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// port lifecycle (H1 contract — protects against the offscreen
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// console's UAT 3x error pattern).
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// 2. Every REQUEST_BUFFER round-trip resolves with success (H2
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// contract — protects against the silent empty-archive shipping).
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// 3. PONGs flow back from SW (closes the health-probe loop).
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// 4. BUFFER messages carry non-empty segments (no silent-drop path).
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import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
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// vi.mock("jszip", ...) replaces the production JSZip module with a stub
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// that round-trips file additions without actually generating a real zip.
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// Production JSZip's generateAsync({type:'blob'}) accepts Node Blobs but
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// fails on them in Node v22+ (the file's read pipeline does an
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// instanceof Blob check that only matches the platform's native Blob, not
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// the polyfilled one — observed: "Can't read the data of 'screenshot.png'.
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// Is it in a supported JavaScript type ... ?"). The mock preserves the
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// integration shape (zip.file() collects, zip.generateAsync() returns a
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// Blob whose .size reflects total content) so saveArchive's success path
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// is reachable without depending on JSZip's Node compatibility.
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vi.mock('jszip', () => {
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class JSZipStub {
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private readonly entries: Map<string, { size: number }> = new Map();
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file(path: string, content: unknown): void {
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let size = 0;
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if (typeof content === 'string') {
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size = content.length;
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} else if (content instanceof Blob) {
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size = content.size;
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} else if (content instanceof Uint8Array) {
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size = content.byteLength;
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} else if (content instanceof ArrayBuffer) {
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size = content.byteLength;
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}
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this.entries.set(path, { size });
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}
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async generateAsync(_opts: { type: 'blob' }): Promise<Blob> {
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let total = 0;
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for (const { size } of this.entries.values()) {
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total += size;
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}
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return new Blob([new Uint8Array(total)], { type: 'application/zip' });
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}
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}
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return { default: JSZipStub };
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});
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// ─── Stubs ──────────────────────────────────────────────────────────────
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interface OffPortStub {
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name: string;
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postMessage: ReturnType<typeof vi.fn>;
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onMessage: {
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addListener: ReturnType<typeof vi.fn>;
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_listeners: Array<(msg: unknown) => void>;
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};
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onDisconnect: {
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addListener: (fn: () => void) => void;
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_listeners: Array<() => void>;
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};
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disconnect: ReturnType<typeof vi.fn>;
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_disconnected: boolean;
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}
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interface SwPortStub {
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name: string;
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sender?: { id?: string };
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postMessage: ReturnType<typeof vi.fn>;
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onMessage: {
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addListener: ReturnType<typeof vi.fn>;
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removeListener: ReturnType<typeof vi.fn>;
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_listeners: Array<(msg: unknown) => void>;
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};
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onDisconnect: {
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addListener: (fn: () => void) => void;
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_listeners: Array<() => void>;
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};
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disconnect: ReturnType<typeof vi.fn>;
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}
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const ORIGINAL_SET_INTERVAL = globalThis.setInterval;
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const ORIGINAL_CLEAR_INTERVAL = globalThis.clearInterval;
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const ORIGINAL_SET_TIMEOUT = globalThis.setTimeout;
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const ORIGINAL_CLEAR_TIMEOUT = globalThis.clearTimeout;
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// Build a paired offscreen-port + SW-port that talk to each other through
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// the captured onMessage listeners. The recorder.ts posts on its port
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// reference (offPort); we route those messages into the SW-port's
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// listeners. And vice-versa for SW -> offscreen.
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//
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// This is a deliberately-minimal harness: the goal is to surface the
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// port lifecycle contract, not to replicate Chrome's full IPC fidelity.
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function pairPorts(): { offPort: OffPortStub; swPort: SwPortStub } {
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// Forward declare to satisfy the postMessage closures.
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const offPort: OffPortStub = {
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name: 'video-keepalive',
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postMessage: vi.fn(),
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onMessage: { addListener: vi.fn(), _listeners: [] },
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onDisconnect: {
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addListener: (fn: () => void) => {
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offPort.onDisconnect._listeners.push(fn);
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},
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_listeners: [],
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},
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disconnect: vi.fn(() => {
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offPort._disconnected = true;
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}),
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_disconnected: false,
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};
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offPort.onMessage.addListener.mockImplementation(
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(fn: (msg: unknown) => void) => {
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offPort.onMessage._listeners.push(fn);
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}
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);
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const swPort: SwPortStub = {
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name: 'video-keepalive',
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sender: { id: 'ext-id-test' },
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postMessage: vi.fn(),
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onMessage: {
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addListener: vi.fn(),
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removeListener: vi.fn(),
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_listeners: [],
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},
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onDisconnect: {
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addListener: (fn: () => void) => {
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swPort.onDisconnect._listeners.push(fn);
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},
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_listeners: [],
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},
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disconnect: vi.fn(),
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};
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swPort.onMessage.addListener.mockImplementation(
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(fn: (msg: unknown) => void) => {
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swPort.onMessage._listeners.push(fn);
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}
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);
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swPort.onMessage.removeListener.mockImplementation(
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(fn: (msg: unknown) => void) => {
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const idx = swPort.onMessage._listeners.indexOf(fn);
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if (idx >= 0) {
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swPort.onMessage._listeners.splice(idx, 1);
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}
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}
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);
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// Wire postMessage AFTER both ports exist so each side can reach the
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// other's listeners.
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offPort.postMessage.mockImplementation((msg: unknown) => {
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if (offPort._disconnected) {
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throw new Error('Attempting to use a disconnected port object');
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}
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swPort.onMessage._listeners.forEach((fn) => fn(msg));
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});
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swPort.postMessage.mockImplementation((msg: unknown) => {
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offPort.onMessage._listeners.forEach((fn) => fn(msg));
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});
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return { offPort, swPort };
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}
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describe('port lifecycle — continuous 600 s simulation (Option C pinning)', () => {
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beforeEach(() => {
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vi.resetModules();
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});
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afterEach(() => {
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globalThis.setInterval = ORIGINAL_SET_INTERVAL;
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globalThis.clearInterval = ORIGINAL_CLEAR_INTERVAL;
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globalThis.setTimeout = ORIGINAL_SET_TIMEOUT;
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globalThis.clearTimeout = ORIGINAL_CLEAR_TIMEOUT;
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});
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it('600 s lifecycle with 2 reconnects + 3 REQUEST_BUFFER round-trips: no Uncaught, no silent loss', async () => {
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// Capture the offscreen recorder's ping interval callback so we can
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// drive it synchronously (no wall-clock waits).
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const intervalCallbacks: Array<() => void> = [];
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globalThis.setInterval = ((cb: () => void, _ms: number) => {
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intervalCallbacks.push(cb);
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return 999 as unknown as ReturnType<typeof setInterval>;
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}) as typeof globalThis.setInterval;
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globalThis.clearInterval = (() => {}) as typeof globalThis.clearInterval;
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// Shared registries for tracking ports across both SW + offscreen.
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const offPorts: OffPortStub[] = [];
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const swPorts: SwPortStub[] = [];
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const onConnectCbs: Array<(p: SwPortStub) => void> = [];
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const onMessageHandlers: Array<
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(
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msg: unknown,
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sender: { id?: string },
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sendResponse: (resp: unknown) => void,
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) => boolean
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> = [];
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// ONE unified chrome stub that the SW and offscreen modules BOTH
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// observe (they share the same `globalThis.chrome`). The SW
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// registers via onConnect.addListener / onMessage.addListener; the
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// offscreen calls connect() — both routed through the same object.
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const sharedChromeStub = {
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runtime: {
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id: 'ext-id-test',
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getURL: (p: string) => `chrome-extension://ext-id-test/${p}`,
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getManifest: () => ({ version: '1.0.0' }),
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sendMessage: vi.fn(),
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onMessage: {
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addListener: vi.fn().mockImplementation(
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(
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cb: (
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msg: unknown,
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sender: { id?: string },
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sendResponse: (resp: unknown) => void,
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) => boolean,
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) => {
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onMessageHandlers.push(cb);
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},
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),
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},
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onConnect: {
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addListener: (cb: (p: SwPortStub) => void) => {
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onConnectCbs.push(cb);
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},
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},
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onInstalled: { addListener: vi.fn() },
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connect: () => {
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const pair = pairPorts();
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offPorts.push(pair.offPort);
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swPorts.push(pair.swPort);
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// Fire the SW's onConnect handler in a microtask so the
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// offscreen's connect() returns first (matching Chrome's
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// async-but-effectively-immediate cross-context wiring).
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queueMicrotask(() => {
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onConnectCbs.forEach((cb) => cb(pair.swPort));
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});
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return pair.offPort;
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},
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},
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offscreen: {
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hasDocument: async () => false,
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createDocument: vi.fn().mockResolvedValue(undefined),
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Reason: { DISPLAY_MEDIA: 'DISPLAY_MEDIA' },
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},
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tabs: {
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query: vi.fn().mockResolvedValue([
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{ id: 1, url: 'https://example.com', windowId: 100 },
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]),
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sendMessage: vi.fn().mockResolvedValue({ events: [], userEvents: [] }),
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captureVisibleTab: vi
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.fn()
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.mockResolvedValue(
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'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==',
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),
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},
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downloads: {
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download: vi.fn().mockResolvedValue(1),
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},
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};
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interface GlobalScope {
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chrome?: unknown;
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MediaRecorder?: { isTypeSupported: (mime: string) => boolean };
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indexedDB?: { deleteDatabase: ReturnType<typeof vi.fn> };
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fetch?: typeof fetch;
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}
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const g = globalThis as unknown as GlobalScope;
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g.chrome = sharedChromeStub;
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g.MediaRecorder = { isTypeSupported: vi.fn().mockReturnValue(true) };
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g.indexedDB = { deleteDatabase: vi.fn() };
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g.fetch = (async () =>
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({
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blob: async () =>
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new Blob([new Uint8Array([0x89, 0x50])], { type: 'image/png' }),
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} as unknown as Response)) as unknown as typeof fetch;
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// Import SW first so its onConnect + onMessage listeners are
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// registered before the offscreen recorder calls connect().
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await import('../../src/background/index');
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expect(onConnectCbs.length).toBeGreaterThanOrEqual(1);
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expect(onMessageHandlers.length).toBeGreaterThanOrEqual(1);
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// Now the offscreen recorder. Its bootstrap calls
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// chrome.runtime.connect() → port 0 wired on both sides.
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const recorder = await import('../../src/offscreen/recorder');
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// Drain microtasks so the queueMicrotask-deferred SW onConnect fires.
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for (let i = 0; i < 8; i++) await Promise.resolve();
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expect(offPorts.length).toBe(1);
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expect(swPorts.length).toBe(1);
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// Seed the offscreen ring buffer with 3 segments so REQUEST_BUFFER
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// round-trips have data to ship.
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recorder.resetBuffer();
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const ebmlMagic = new Uint8Array([0x1a, 0x45, 0xdf, 0xa3]);
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for (let i = 0; i < 3; i++) {
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const payload = new Uint8Array(1024);
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payload.set(ebmlMagic, 0);
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payload.fill(i + 0x10, ebmlMagic.length);
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recorder.pushSegmentForTest(new Blob([payload], { type: 'video/webm' }));
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}
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expect(recorder.getSegments().length).toBe(3);
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// Helper to dispatch SAVE_ARCHIVE through the SW's onMessage handler
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// and drain microtasks until the response settles.
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async function dispatchSaveArchive(): Promise<{
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success?: boolean;
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error?: unknown;
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}> {
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let resp: { success?: boolean; error?: unknown } | undefined;
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onMessageHandlers[0](
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{ type: 'SAVE_ARCHIVE' },
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{ id: 'ext-id-test' },
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(r) => {
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resp = r as { success?: boolean; error?: unknown };
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},
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);
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// Generous drain: SAVE_ARCHIVE chains several awaits (captureScreenshot,
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// getVideoBufferFromOffscreen, tabs.sendMessage, createArchive's
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// zip.generateAsync). JSZip in particular uses internal Promise
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// chains that need multiple macrotask flushes to settle.
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for (let phase = 0; phase < 5; phase++) {
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for (let i = 0; i < 64; i++) await Promise.resolve();
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await new Promise<void>((resolve) => setTimeout(resolve, 0));
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}
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if (resp === undefined) {
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throw new Error('SAVE_ARCHIVE did not respond within drain window');
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}
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return resp;
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}
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// ──────────────────────────────────────────────────────────────────
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// Stage 1 (T ≈ 0–289 s) — ping/pong cycles. PINGs reach SW; SW
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// echoes PONG; the offscreen's missedPongs counter stays at 0.
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// ──────────────────────────────────────────────────────────────────
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const pingCb = intervalCallbacks[0];
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expect(pingCb).toBeTruthy();
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// 12 ping cycles ≈ 300 s at PORT_PING_MS = 25_000 ms.
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for (let i = 0; i < 12; i++) {
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// The offscreen's ping callback should not throw on a healthy port.
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expect(() => pingCb()).not.toThrow();
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}
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// No new port should have been created — the health probe is happy.
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expect(offPorts.length).toBe(1);
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// ──────────────────────────────────────────────────────────────────
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// Stage 2 (T ≈ 290 s) — first REQUEST_BUFFER round-trip via SW
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// SAVE_ARCHIVE. The legacy code's 290 s pre-emptive reconnect would
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// have fired here; the Option C design has no such timer, so the
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// round-trip completes cleanly on the original port.
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// ──────────────────────────────────────────────────────────────────
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const save1 = await dispatchSaveArchive();
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expect(save1.success).toBe(true);
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// ──────────────────────────────────────────────────────────────────
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// Stage 3 (T ≈ 295 s) — simulate an EXTERNAL reconnect. The Option C
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// health probe doesn't fire one on its own (no PINGs missed), so we
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// force it via the path the H1.b test pins: external disconnect →
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// ping detects → reconnectPort initiates. Fresh port pair appears.
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// ──────────────────────────────────────────────────────────────────
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offPorts[0]._disconnected = true;
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expect(() => pingCb()).not.toThrow();
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// Drain microtasks for the reconnect to wire up port 1.
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for (let i = 0; i < 32; i++) await Promise.resolve();
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expect(offPorts.length).toBe(2);
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expect(swPorts.length).toBe(2);
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// ──────────────────────────────────────────────────────────────────
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// Stage 4 (T ≈ 296 s) — second REQUEST_BUFFER round-trip on the
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// FRESH port. This is the round-trip that the legacy code would have
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// failed silently (the SW's per-request listener was bound to the
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// OLD port). Under Option C the SW's pendingBufferRequests map is
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// port-agnostic — the BUFFER lands on whichever port the offscreen
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// posts on, and the requestId match resolves cleanly.
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// ──────────────────────────────────────────────────────────────────
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expect(recorder.getSegments().length).toBe(3);
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const save2 = await dispatchSaveArchive();
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expect(save2.success).toBe(true);
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// ──────────────────────────────────────────────────────────────────
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// Stage 5 (T ≈ 580 s) — second forced reconnect + third
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// REQUEST_BUFFER round-trip. Pins that the lifecycle remains stable
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||||
// across multiple cycles (the UAT session observed 3 errors at
|
||||
// 290/315/340 s — recurring at PORT_PING_MS = 25_000 ms intervals
|
||||
// after the initial pre-emptive reconnect).
|
||||
// ──────────────────────────────────────────────────────────────────
|
||||
offPorts[1]._disconnected = true;
|
||||
expect(() => pingCb()).not.toThrow();
|
||||
for (let i = 0; i < 32; i++) await Promise.resolve();
|
||||
expect(offPorts.length).toBe(3);
|
||||
expect(swPorts.length).toBe(3);
|
||||
|
||||
const save3 = await dispatchSaveArchive();
|
||||
expect(save3.success).toBe(true);
|
||||
|
||||
// ──────────────────────────────────────────────────────────────────
|
||||
// Final assertions
|
||||
// ──────────────────────────────────────────────────────────────────
|
||||
|
||||
// a) Every BUFFER posted (across all ports) carried segments — no
|
||||
// silent-loss path was reachable in this simulation.
|
||||
let buffersWithSegments = 0;
|
||||
let buffersTotal = 0;
|
||||
for (const port of offPorts) {
|
||||
for (const call of port.postMessage.mock.calls) {
|
||||
const msg = call[0] as { type?: unknown; segments?: unknown };
|
||||
if (msg.type === 'BUFFER') {
|
||||
buffersTotal++;
|
||||
if (Array.isArray(msg.segments) && msg.segments.length > 0) {
|
||||
buffersWithSegments++;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
expect(buffersTotal).toBeGreaterThanOrEqual(3);
|
||||
// EVERY buffer that crossed the wire carried segments.
|
||||
expect(buffersWithSegments).toBe(buffersTotal);
|
||||
|
||||
// b) PONGs round-tripped — the SW echoed at least one PONG (proving
|
||||
// the health-probe loop closes).
|
||||
let pongCount = 0;
|
||||
for (const port of swPorts) {
|
||||
for (const call of port.postMessage.mock.calls) {
|
||||
const msg = call[0] as { type?: unknown };
|
||||
if (msg.type === 'PONG') {
|
||||
pongCount++;
|
||||
}
|
||||
}
|
||||
}
|
||||
expect(pongCount).toBeGreaterThanOrEqual(1);
|
||||
|
||||
recorder.resetBuffer();
|
||||
});
|
||||
});
|
||||
Reference in New Issue
Block a user