import { formatOptionalPeriod, formatPeriod } from './period.js';

describe('work period', () => {
  it('keeps an open period in the resume wording', () => {
    expect(formatPeriod(2023, null)).toBe('2023 — н.в.');
  });

  it('joins a closed range with an en dash', () => {
    expect(formatPeriod(2022, 2023)).toBe('2022–2023');
  });

  it('collapses a single year', () => {
    expect(formatPeriod(2024, 2024)).toBe('2024');
  });

  it('omits a period when the start year is unknown', () => {
    expect(formatOptionalPeriod(null, null)).toBeNull();
    expect(formatOptionalPeriod(null, 2024)).toBeNull();
  });
});