import {
  isChannelCarrierCompatible,
  legacyCarrierFromCapabilities,
  normalizeChannelCarriers,
} from './channels.helpers';

describe('channel carrier capabilities', () => {
  it('preserves the legacy default when an old caller omits carrier fields', () => {
    expect(normalizeChannelCarriers()).toEqual(['mobile']);
  });

  it('expands a historical three-network channel without inventing data for partial capabilities', () => {
    expect(normalizeChannelCarriers(undefined, 'all')).toEqual(['mobile', 'unicom', 'telecom']);
    expect(normalizeChannelCarriers(['telecom', 'mobile'], 'all')).toEqual(['mobile', 'telecom']);
    expect(legacyCarrierFromCapabilities(['mobile', 'telecom'])).toBe('multi');
  });

  it('checks a group carrier against the new multi-select capability list', () => {
    expect(isChannelCarrierCompatible('multi', 'mobile', ['mobile', 'telecom'])).toBe(true);
    expect(isChannelCarrierCompatible('multi', 'unicom', ['mobile', 'telecom'])).toBe(false);
  });
});