@Test
  public void testAddToPrice() throws Exception {
    double dEndPrice = 2.1186; // price*amountBuy*myCart.TAX_FOOD;

    int iAmountBuy = 2;

    CRS.addToPrice(myCart, sBarcode.toCharArray(), iAmountBuy);

    assertEquals(dEndPrice, myCart.getdFullPrice(), 0.001);
  }
  @Test
  public void testRemoveFromPrice() throws Exception {
    double dEndPrice = 1.0593; // price * (amountBuy - amountRemove) * myCart.TAX_FOOD;

    int iAmountBuy = 2;
    int iAmountRemove = 1;

    CRS.addToPrice(myCart, sBarcode.toCharArray(), iAmountBuy);
    CRS.removeFromPrice(myCart, sBarcode.toCharArray(), iAmountRemove);

    assertEquals(dEndPrice, myCart.getdFullPrice(), 0.001);
  }