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test: watchdog E2E in 1.5s instead of 22.7s (tunable poll interval)

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server.ts gains BROWSE_WATCHDOG_INTERVAL_MS (floor 50ms, default 15s
unchanged). The #994 stay-alive test runs a 250ms tick and waits for the
stay-alive log line instead of blind-sleeping 2s + 20s past the
production interval.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-08-15 08:06:42 -07:00
co-authored by Claude Fable 5
parent 43e77d84af
commit da30a3cb5a
2 changed files with 27 additions and 14 deletions
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browse/test/watchdog.test.ts
+19 -13
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@@ -25,8 +25,9 @@ import * as os from 'os';
// /pair-agent users (server lingers after disconnect).
//
// Each test spawns the real server.ts. Tests 1 and 2 verify behavior via
// stdout log line (fast). Test 3 waits for the watchdog poll cycle to confirm
// the server REMAINS alive after parent death (slow — ~20s observation window).
// stdout log line (fast). Test 3 shrinks the watchdog tick to 250ms via
// BROWSE_WATCHDOG_INTERVAL_MS and waits for the stay-alive log line, then
// confirms the server survived parent death (~1-2s instead of a 20s sleep).
const ROOT = path.resolve(import.meta.dir, '..');
const SERVER_SCRIPT = path.join(ROOT, 'src', 'server.ts');
@@ -137,21 +138,26 @@ describe('parent-process watchdog (v0.18.1.0)', () => {
const parentPid = parentProc.pid!;
// Default headless: no BROWSE_HEADED, real parent PID — watchdog active.
serverProc = spawnServer({ BROWSE_PARENT_PID: String(parentPid) }, 34903);
// 250ms tick (test-only knob) so this test doesn't wait out the
// production 15s interval; the old version blind-slept 22s.
serverProc = spawnServer(
{ BROWSE_PARENT_PID: String(parentPid), BROWSE_WATCHDOG_INTERVAL_MS: '250' },
34903,
);
const serverPid = serverProc.pid!;
// Give the server a moment to start and register the watchdog interval.
await Bun.sleep(2000);
// Give the server a beat to register the watchdog interval.
await Bun.sleep(500);
expect(isProcessAlive(serverPid)).toBe(true);
// Kill the parent. The watchdog polls every 15s, so first tick after
// parent death lands within ~15s. Pre-#994 the server would shutdown
// here. Post-#994 the server logs the parent exit and stays alive.
// Kill the parent. Pre-#994 the server would shut down on the next tick.
// Post-#994 it logs the parent exit and stays alive — wait for that log
// line instead of sleeping past a fixed interval.
parentProc.kill('SIGKILL');
// Wait long enough for at least one watchdog tick (15s) plus margin.
// Server should still be alive — that's the whole point of #994.
await Bun.sleep(20_000);
const out = await readStdoutUntil(serverProc, 'server stays alive', 10_000);
expect(out).toContain(
`Parent process ${parentPid} exited (server stays alive, idle timeout will clean up)`,
);
expect(isProcessAlive(serverPid)).toBe(true);
}, 45_000);
}, 30_000);
});