// DO: Trust the data model guarantees
order.setTotalPrice(PriceUtils.centsToDollars(transactableBag.getTotal()));

// DON'T: Add unnecessary null checks
if (Objects.nonNull(transactableBag.getTotal())) {
  order.setTotalPrice(PriceUtils.centsToDollars(transactableBag.getTotal()));
}

// CORRECT
OfferData.Shipping.Price price = new OfferData.Shipping.Price();

// WRONG
OfferData.Shipping.Method.Price price = new OfferData.Shipping.Method.Price();

// CORRECT
config.setRithumConfig(rithumConfig);

// WRONG
config.setRithum(rithumConfig);

// CORRECT - merchantId is Integer
assertEquals(Integer.valueOf(12345), result.getMerchantId());

// WRONG
assertEquals(Long.valueOf(12345L), result.getMerchantId());

@Test
public void testOrderSyncWithFallbackShipping() {
  try (MockedStatic<RithumMerchantConfig> mockedRithumConfig = Mockito.mockStatic(RithumMerchantConfig.class)) {
    mockedRithumConfig.when(() -> RithumMerchantConfig.shouldUseFallbackShippingMethods(config)).thenReturn(true);

    List<OfferData.Shipping> result = rithumOrderSyncService.getShippingEstimates(request);

    assertNotNull(result);
    assertTrue(CollectionUtils.isNotEmpty(result));
  }
}

private DecryptedMerchantCredentials createDecryptedMerchantCredentials() {
  DecryptedMerchantCredentials dmc = new DecryptedMerchantCredentials();
  dmc.setMerchantId(12345);  // Use Integer, not Long
  dmc.setPlatform(Merchant.Platform.RITHUM);
  return dmc;
}