Function waitFor

test/gstack-detach.test.ts:20–27

(pred: () => boolean, ms: number)

  return (spawnSync('ps', ['-o', 'pgid=', '-p', String(process.pid)], { encoding: 'utf-8' }).stdout || '').trim();
}
function waitFor(pred: () => boolean, ms: number): boolean {
  const end = Date.now() + ms;
  while (Date.now() < end) {
    if (pred()) return true;
    spawnSync('sleep', ['0.2']);
  }
  return pred();
}
function logHas(p: string, needle: string): boolean {
  try { return fs.readFileSync(p, 'utf-8').includes(needle); } catch { return false; }
}