### Question:
ChargingStationOcpp15SoapClient implements ChargingStationOcpp15Client { @Override public int getAuthorizationListVersion(ChargingStationId id) { ChargePointService chargePointService = this.createChargingStationService(id); GetLocalListVersionResponse response = chargePointService.getLocalListVersion(new GetLocalListVersionRequest(), id.getId()); int currentWhitelistVersion = response.getListVersion(); LOG.info("At the moment {} has authorizationlist version {}", id.getId(), currentWhitelistVersion); return currentWhitelistVersion; }  Map<String, String> getConfiguration(ChargingStationId id, Set<String> keys); @Override boolean startTransaction(ChargingStationId id, IdentifyingToken identifyingToken, EvseId evseId); @Override boolean stopTransaction(ChargingStationId id, int transactionId); @Override boolean softReset(ChargingStationId id); @Override boolean hardReset(ChargingStationId id); @Override RequestResult unlockConnector(ChargingStationId id, EvseId evseId); @Override RequestResult changeAvailabilityToInoperative(ChargingStationId id, EvseId evseId); @Override RequestResult changeAvailabilityToOperative(ChargingStationId id, EvseId evseId); @Override DataTransferRequestResult dataTransfer(ChargingStationId id, DataTransferMessage dataTransferMessage); @Override boolean changeConfiguration(ChargingStationId id, ConfigurationItem configurationItem); @Override String getDiagnostics(ChargingStationId id, DiagnosticsUploadSettings diagnosticsUploadSettings); @Override boolean clearCache(ChargingStationId id); @Override void updateFirmware(ChargingStationId id, String downloadLocation, Date retrieveDate, Integer numRetries, Integer retryInterval); @Override int getAuthorizationListVersion(ChargingStationId id); @Override RequestResult sendAuthorizationList(ChargingStationId id, String hash, int listVersion, Set<IdentifyingToken> identifyingTokens, AuthorizationListUpdateType updateType); @Override io.motown.domain.api.chargingstation.ReservationStatus reserveNow(ChargingStationId id, EvseId evseId, IdentifyingToken identifyingToken, Date expiryDate, IdentifyingToken parentIdentifyingToken, int reservationId); @Override RequestResult cancelReservation(ChargingStationId id, int reservationId); void setDomainService(DomainService domainService); void setChargingStationProxyFactory(ChargingStationProxyFactory chargingStationProxyFactory); void setIdentifyingTokenConverterService(IdentifyingTokenConverterService identifyingTokenConverterService);  }### Answer:
@Test public void getAuthorizationListVersionVerifyReturnValue() { int listVersion = 1; when(chargePointService.getLocalListVersion(any(GetLocalListVersionRequest.class), eq(CHARGING_STATION_ID.getId()))).thenReturn(getGetLocalListVersionResponse(listVersion)); int authorizationListVersion = client.getAuthorizationListVersion(CHARGING_STATION_ID); assertEquals(listVersion, authorizationListVersion); }
@Test public void getAuthorizationListVersionVerifyServiceCall() { when(chargePointService.getLocalListVersion(any(GetLocalListVersionRequest.class), eq(CHARGING_STATION_ID.getId()))).thenReturn(getGetLocalListVersionResponse(1)); client.getAuthorizationListVersion(CHARGING_STATION_ID); verify(chargePointService).getLocalListVersion(any(GetLocalListVersionRequest.class), eq(CHARGING_STATION_ID.getId())); }