import { describe, expect, test } from 'vitest';

import {
  parseSignedReadUrlExpiresAtMs,
  shouldReuseSignedReadUrlCacheEntry,
} from './signedReadUrlCache';

describe('signedReadUrlCache', () => {
  test('只在签名地址距离过期超过安全窗口时复用', () => {
    const nowMs = Date.parse('2099-01-01T00:00:00Z');
    const entry = {
      signedUrl: 'https://signed.example.com/frame.png',
      expiresAtMs: parseSignedReadUrlExpiresAtMs('2099-01-01T00:05:00Z'),
    };

    expect(shouldReuseSignedReadUrlCacheEntry(entry, nowMs)).toBe(true);
    expect(shouldReuseSignedReadUrlCacheEntry(entry, nowMs + 269_999)).toBe(
      true,
    );
    expect(shouldReuseSignedReadUrlCacheEntry(entry, nowMs + 270_000)).toBe(
      false,
    );
  });
});