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https://github.com/screentinker/screentinker.git
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12c0004245
The subprocess-booting test suites hand-picked fixed ports in a cramped ~3955-4021 range, and 156-schedule-read-path deviated to a RANDOM port (3900 + rand%90) that overlapped those fixed ports. Under CI load two servers could race on the same port, surfacing as flaky "no such table: devices" / "FOREIGN KEY constraint failed" (a server answering a request against a half-migrated or wrong DB). It's environmental — the suites pass locally and in isolation. Fix: a shared test/helpers/free-port.js (bind :0 on loopback, read the OS-assigned port, release) called in before() so every suite gets a guaranteed-unique ephemeral port — concurrent suites can no longer collide, and no one has to hand-assign ports. - Codemod converted 30 suites: const PORT = <fixed|random> -> let PORT (+ BASE) assigned via `PORT = await freePort()` at the top of before(). - 3 hand-fixed (different structure): 148-eviction-storm (lowercase `base`), boot-health (no before() — allocates PORT + a throwaway SEED_PORT inside the test, replacing the hardcoded 3894), totp-keyrotation (no before() — allocates at the test start before bootServer()). No fixed 39xx/40xx ports remain. Full server suite 435/435; the 4 hand-touched suites pass in isolation. Pure test-infra change — no app code touched.
85 lines
4.7 KiB
JavaScript
85 lines
4.7 KiB
JavaScript
'use strict';
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// #142 step 2 — integration: the lag monitor samples, persists to a BOUNDED table,
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// and surfaces current lag on /api/status. Boots the real server with fast sampling
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// and a tiny (fractional-day) retention so the prune is observable within the test.
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const { test, before, after } = require('node:test');
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const assert = require('node:assert/strict');
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const { spawn } = require('node:child_process');
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const path = require('node:path');
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const os = require('node:os');
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const fs = require('node:fs');
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const crypto = require('node:crypto');
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const Database = require('better-sqlite3');
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const { freePort } = require('./helpers/free-port');
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let PORT, BASE;
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const DATA_DIR = path.join(os.tmpdir(), 'st-lag-int-' + crypto.randomBytes(4).toString('hex'));
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const LOG = path.join(os.tmpdir(), 'st-lag-int-' + crypto.randomBytes(4).toString('hex') + '.log');
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let proc;
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before(async () => {
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PORT = await freePort();
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BASE = `http://127.0.0.1:${PORT}`;
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const logFd = fs.openSync(LOG, 'w');
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proc = spawn('node', ['server.js'], {
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cwd: path.join(__dirname, '..'),
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env: {
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...process.env, DATA_DIR, SELF_HOSTED: 'true', PORT: String(PORT), NODE_ENV: 'test',
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LAG_SAMPLE_INTERVAL_MS: '200', // sample fast
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LAG_FLUSH_MS: '200', // #146 Item E: batch-insert fast so persistence is observable in-test
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LAG_TELEMETRY_RETENTION_DAYS: '0.00001', // ~0.86s retention
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LAG_PRUNE_INTERVAL_MS: '400', // prune often
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},
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stdio: ['ignore', logFd, logFd],
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});
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let up = false;
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for (let i = 0; i < 80; i++) {
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try { const r = await fetch(BASE + '/api/status'); if (r.ok) { up = true; break; } } catch { /* not yet */ }
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await new Promise(r => setTimeout(r, 250));
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}
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if (!up) throw new Error('server did not boot:\n' + fs.readFileSync(LOG, 'utf8').slice(-2000));
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});
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after(() => { try { proc.kill('SIGKILL'); } catch { /* */ } });
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test('/api/status exposes a current loop_lag snapshot', async () => {
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const r = await fetch(BASE + '/api/status');
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const body = await r.json();
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assert.ok(body.loop_lag, 'loop_lag present on /api/status');
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assert.equal(typeof body.devices_connected, 'number', 'devices_connected always-on live-fleet gauge');
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assert.ok(['normal', 'elevated', 'critical'].includes(body.loop_lag.band), 'band is a valid level');
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assert.equal(typeof body.loop_lag.p99_ms, 'number', 'p99_ms is numeric');
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assert.equal(typeof body.loop_lag.mean_ms, 'number', 'mean_ms is numeric');
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// #146 P3.8: soak observability block — gauges + throughput
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assert.ok(body.debug, 'debug block present');
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assert.equal(typeof body.debug.flap.buckets, 'number', 'flap bucket count exposed');
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assert.equal(typeof body.debug.flap.quarantined, 'number', 'flap quarantine count exposed');
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assert.equal(typeof body.debug.flap.refusedTotal, 'number', 'flap refusedTotal exposed');
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assert.equal(typeof body.debug.flap.refusedLastWindow, 'number', 'flap refusedLastWindow exposed');
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assert.equal(typeof body.debug.flap.quarantineStartsTotal, 'number', 'flap quarantineStartsTotal exposed');
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assert.equal(typeof body.debug.flap.quarantineStartsLastWindow, 'number', 'flap quarantineStartsLastWindow exposed');
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assert.equal(typeof body.debug.ota_breaker.rateBackoffTotal, 'number', 'ota breaker rateBackoffTotal exposed');
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assert.equal(typeof body.debug.ota_breaker.rateBackoffLastWindow, 'number', 'ota breaker rateBackoffLastWindow exposed');
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assert.equal(typeof body.debug.ota_download.inFlight, 'number', 'download in-flight exposed');
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assert.equal(typeof body.debug.ota_download.servedTotal, 'number', 'download servedTotal exposed');
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assert.equal(typeof body.debug.ota_download.shedTotal, 'number', 'download shedTotal exposed');
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assert.ok('maintenance' in body.debug && typeof body.debug.maintenance.ms === 'number', 'last-prune stats exposed');
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assert.equal(typeof body.debug.maintenance.sweepsTotal, 'number', 'maintenance sweepsTotal exposed');
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assert.equal(typeof body.debug.log_coalescer_buffer, 'number', 'coalescer buffer size exposed');
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});
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test('lag samples are persisted AND bounded by retention prune (not unbounded)', async () => {
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// Let it sample for ~3s. At 200ms/sample that is ~15 inserts, but with ~0.86s
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// retention pruned every 400ms the table must stay small — proving the table
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// can never become a second unbounded-growth table.
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await new Promise(r => setTimeout(r, 1800));
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const dbPath = path.join(DATA_DIR, 'db', 'remote_display.db');
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const db = new Database(dbPath, { readonly: true });
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const count = db.prepare('SELECT COUNT(*) c FROM event_loop_lag').get().c;
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db.close();
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assert.ok(count >= 1, 'lag samples are being persisted');
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assert.ok(count < 15, `table is bounded by the prune (held ${count} rows over ~3s of 200ms sampling)`);
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});
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