import { describe, it, expect } from 'vitest';
import { fmtDate } from './instaUtils';

describe('instaUtils.fmtDate', () => {
  it('returns empty string for falsy input', () => {
    expect(fmtDate('')).toBe('');
    expect(fmtDate(null)).toBe('');
    expect(fmtDate(undefined)).toBe('');
  });
  it('returns a non-empty string for a valid ISO date (locale/tz-dependent format)', () => {
    const out = fmtDate('2026-07-10T09:30:00Z');
    expect(typeof out).toBe('string');
    expect(out.length).toBeGreaterThan(0);
  });
});