import { describe, it, expect } from 'vitest';

import { ALL_VARIANTS, availableVariants } from './variants';

describe('availableVariants', () => {
  it('is ungated (all variants) for an empty or absent set', () => {
    expect(availableVariants([])).toEqual(ALL_VARIANTS);
    expect(availableVariants(undefined)).toEqual(ALL_VARIANTS);
  });

  it('offers only English for an en-only service', () => {
    expect(availableVariants(['en']).map((v) => v.id)).toEqual(['english']);
  });

  it('offers Russian and Эрудит for a ru-only service', () => {
    expect(availableVariants(['ru']).map((v) => v.id)).toEqual(['russian_scrabble', 'erudit']);
  });

  it('offers every variant for a bilingual service', () => {
    expect(availableVariants(['en', 'ru']).map((v) => v.id)).toEqual(['english', 'russian_scrabble', 'erudit']);
  });
});