import { describe, it, expect } from 'vitest';
import { convertDateToTimestamp } from '../convert-date-to-timestamp';

const c = convertDateToTimestamp();

describe('convertDateToTimestamp', () => {
  describe('toUnix', () => {
    it('валидная дата', () => {
      expect(c.toUnix('2025-01-01')).toBe(Date.UTC(2025, 0, 1) / 1000);
    });

    it('начало эпохи', () => {
      expect(c.toUnix('1970-01-01')).toBe(0);
    });

    it('невалидная дата → null', () => {
      expect(c.toUnix('invalid')).toBe(null);
    });
  });

  describe('fromUnix', () => {
    it('timestamp → дата', () => {
      expect(c.fromUnix(0)).toBe('1970-01-01');
    });

    it('конкретная дата', () => {
      const ts = Date.UTC(2024, 2, 5) / 1000;
      expect(c.fromUnix(ts)).toBe('2024-03-05');
    });
  });

  describe('roundtrip', () => {
    it('toUnix → fromUnix', () => {
      const date = '2024-03-05';
      expect(c.fromUnix(c.toUnix(date)!)).toBe(date);
    });
  });
});