import {
  MAX_ATTEMPTS,
  RETRY_DELAYS_MS,
  retryDelayMs,
  STALE_CLAIM_MS,
} from './retry-policy';

describe('retry policy', () => {
  it('waits 30 s, 2 min, 10 min, 1 h and from the 5th failure on 6 h', () => {
    expect([1, 2, 3, 4, 5, 6, 7].map(retryDelayMs)).toEqual([
      30_000, 120_000, 600_000, 3_600_000, 21_600_000, 21_600_000, 21_600_000,
    ]);
  });

  it('gives up after 8 attempts and treats a claim older than 5 min as stale', () => {
    expect(MAX_ATTEMPTS).toBe(8);
    expect(STALE_CLAIM_MS).toBe(300_000);
    expect(RETRY_DELAYS_MS).toEqual([
      30_000, 120_000, 600_000, 3_600_000, 21_600_000,
    ]);
  });

  it.each([0, -1, 1.5, Number.NaN])(
    'refuses %p failed attempts - a delay exists only after a failure',
    (attempts) => {
      expect(() => retryDelayMs(attempts)).toThrow(RangeError);
    },
  );
});