private void addGiftCertificateToOrderPayment(final OrderPayment orderPayment) {
   orderPayment.setPaymentMethod(PaymentType.GIFT_CERTIFICATE);
   GiftCertificate giftCertificate = new GiftCertificateImpl();
   giftCertificate.setGiftCertificateCode(TEST_GIFT_CERTIFICATE_CODE);
   orderPayment.setGiftCertificate(giftCertificate);
 }
 private void addPaymentTokenToOrderPayment(final OrderPayment orderPayment) {
   orderPayment.setPaymentMethod(PaymentType.PAYMENT_TOKEN);
   PaymentToken paymentToken =
       new PaymentTokenImpl.TokenBuilder().withDisplayValue(TEST_TOKEN_DISPLAY_VALUE).build();
   orderPayment.usePaymentToken(paymentToken);
 }
 private void addCreditCardToOrderPayment(final OrderPayment orderPayment) {
   orderPayment.setPaymentMethod(PaymentType.CREDITCARD);
   orderPayment.setCardType(TEST_CREDIT_CARD_TYPE);
   orderPayment.setUnencryptedCardNumber(TEST_CREDIT_CARD_NUMBER);
 }