Function pollUntil

apps/api/e2e/lib.ts:50–62

(
  fn: () => Promise<T>,
  { timeoutMs = 30_000, intervalMs = 750 } = {}
)

/** Poll `fn` until it returns a truthy value or the timeout elapses. */
export async function pollUntil<T>(
  fn: () => Promise<T>,
  { timeoutMs = 30_000, intervalMs = 750 } = {}
): Promise<T | null> {
  const deadline = Date.now() + timeoutMs;
  // biome-ignore lint/nursery/noConstantCondition: poll loop
  while (true) {
    const value = await fn();
    if (value) return value;
    if (Date.now() >= deadline) return null;
    await sleep(intervalMs);
  }
}

// ── Report framework ──────────────────────────────────────────────────────
type Result = { scenario: string; name: string; ok: boolean; detail?: string };