text: import {getSupportedLanguageCode} from '../amp-story-localization-service';
  
  describes.fakeWin('amp-story-localization-service', {amp: true}, () => {
    describe('getSupportedLanguageCode', () => {
      it('returns the first language code when it is supported', () => {
        expect(
          getSupportedLanguageCode(['es-419', 'es', 'en', 'default'])
        ).to.equal('es-419');
      });
  
      it('returns the fallback language code when the first is not supported', () => {
        expect(
          getSupportedLanguageCode(['es-519', 'es', 'en', 'default'])
        ).to.equal('es');
      });
  
      it('returns the properly cased value', () => {
        expect(getSupportedLanguageCode(['en-gb', 'en', 'default'])).to.equal(
          'en-GB'
        );
      });
  
      it('returns en when nothing is supported', () => {
        expect(getSupportedLanguageCode(['AlfredoOoOoOoOooooo'])).to.equal('en');
        expect(getSupportedLanguageCode([])).to.equal('en');
        expect(getSupportedLanguageCode(['en'])).to.equal('en');
        expect(getSupportedLanguageCode(['default'])).to.equal('en');
      });
    });
  });
  