### Question:
ProductCartService extends WebService { @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(propagation = Propagation.REQUIRED) public List<Long> getProductsIdOfCart(String uuid) throws UserNotExistingException { return productCartDao.getProductsIdOfCart(getUser(uuid)); }  @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = false, propagation = Propagation.REQUIRED) ProductCart createCartOfUser(String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = false, propagation = Propagation.REQUIRED) ProductCart createCartOfUser(User user); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = false, propagation = Propagation.REQUIRED) void deleteCartOfUser(String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true, propagation = Propagation.REQUIRED) ProductCart getCartOfUser(String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true, propagation = Propagation.REQUIRED) ProductCart getCartOfUser(User user); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(propagation = Propagation.REQUIRED) void addProductToCart(String uuid, Long p_id); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(propagation = Propagation.REQUIRED) void removeProductFromCart(String uuid, Long p_id); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(propagation = Propagation.REQUIRED) List<Long> getProductsIdOfCart(String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true, propagation = Propagation.REQUIRED) List<Product> getProductsOfCart(String uuid, int skip, int top); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true, propagation = Propagation.REQUIRED) int countProductsInCart(String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true) int countProducts(CartSQLVisitor visitor, String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true) List<Product> getCartProducts(CartSQLVisitor visitor, String uuid, int skip, int top); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(readOnly = true, propagation = Propagation.REQUIRED) boolean hasProducts(String uuid); @PreAuthorize("hasRole('ROLE_DOWNLOAD')") @Transactional(propagation = Propagation.REQUIRED) void clearCart(String uuid);  }### Answer:
@Test (priority=1) public void getProductsIdOfCart() { List<Long>products = pcs.getProductsIdOfCart("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa0"); Assert.assertEquals (products.size(), 2); Assert.assertEquals (products.get (0), new Long(5L)); Assert.assertEquals (products.get (1), new Long(0L)); products = pcs.getProductsIdOfCart("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1"); Assert.assertEquals (products.size(), 0); products = pcs.getProductsIdOfCart("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2"); Assert.assertEquals (products.size(), 0); products = pcs.getProductsIdOfCart("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa3"); Assert.assertEquals (products.size(), 1); Assert.assertEquals (products.get (0), new Long(5L)); }