@Test
  public void testGetLowestPrice() {

    TnPoi tnpoi = new TnPoi();

    GasPriceInfo gasPriceInfo = new GasPriceInfo();
    List<GasPriceInfo> gasPriceInfos = new ArrayList<GasPriceInfo>();
    gasPriceInfos.add(gasPriceInfo);

    gasPriceInfo.setPrice(1.0);

    gasPriceInfo.setGasType(GasPriceTypeDef.TYPE_BASIC_GRADE);
    tnpoi.setGasPriceInfos(gasPriceInfos);
    AdjugglerUtil.getLowestPrice(tnpoi);

    gasPriceInfo.setGasType(GasPriceTypeDef.TYPE_MID_GRADE);
    tnpoi.setGasPriceInfos(gasPriceInfos);
    AdjugglerUtil.getLowestPrice(tnpoi);

    gasPriceInfo.setGasType(GasPriceTypeDef.TYPE_HIGH_GRADE);
    tnpoi.setGasPriceInfos(gasPriceInfos);
    AdjugglerUtil.getLowestPrice(tnpoi);

    gasPriceInfo.setGasType(GasPriceTypeDef.TYPE_DIESEL_GRADE);
    tnpoi.setGasPriceInfos(gasPriceInfos);
    AdjugglerUtil.getLowestPrice(tnpoi);
  }
 public TnPoi getTnPoi() {
   TnPoi poi = new TnPoi();
   poi.setFeatureName("feature name");
   poi.setBrandName("brand name");
   return poi;
 }