import { describe, expect, it } from 'vitest';
import { brToISO, isValidDateBR, maskDateBR } from './brazilian-date-input';

describe('brazilian-date-input', () => {
  it('masks digits as DD/MM/YYYY', () => {
    expect(maskDateBR('01022000')).toBe('01/02/2000');
    expect(maskDateBR('01')).toBe('01');
  });

  it('validates calendar dates', () => {
    expect(isValidDateBR('01/02/2000')).toBe(true);
    expect(isValidDateBR('31/02/2000')).toBe(false);
    expect(isValidDateBR('1/2/2000')).toBe(false);
  });

  it('converts BR date to ISO', () => {
    expect(brToISO('01/02/2000')).toBe('2000-02-01');
    expect(brToISO('bad')).toBeNull();
  });
});