import { test, expect } from "vitest";
import { MaintenanceBarrier } from "../src/runtime/maintenance-gate.js";

test("activation waits for an in-flight admission lease and rejects later admissions", async () => {
  const gate = new MaintenanceBarrier();
  const release = gate.acquire();
  expect(release).toBeTypeOf("function");
  let acknowledged = false;
  const activation = gate.activate().then(() => { acknowledged = true; });
  await Promise.resolve();
  expect(acknowledged).toBe(false);
  expect(gate.acquire()).toBeUndefined();
  release?.();
  await activation;
  expect(acknowledged).toBe(true);
  expect(gate.status()).toEqual({ active: true, admissions: 0 });
  gate.deactivate();
  expect(gate.acquire()).toBeTypeOf("function");
});