### Question:
IbanGenerationService { public Map<CountryCode, String> getCountryCodes() { Map<CountryCode, String> codes = new HashMap<>(); COUNTRY_CODES.forEach(c -> codes.put(c, c.getName())); return TppData.sortMapByValue(codes); }  String generateNextIban(String tppId); String generateIbanForNisp(DataPayload payload, String iban); Map<CountryCode, String> getCountryCodes(); BankCodeStructure getBankCodeStructure(CountryCode code);  }### Answer:
@Test void getCountryCodes() { Map<CountryCode, String> codes = generationService.getCountryCodes(); assertFalse(codes.isEmpty()); }