@Test public void 상품주문(){ Member member = new Member(); member.setUsername("회원1"); member.setAddress(new Address("서울", "강가", "123-123")); em.persist(member); Item book = new Book(); book.setName("시골 JPA"); book.setPrice(10000); book.setStockQuantity(10); em.persist(book); int orderCount = 2; Long orderId = orderSerivce.order(member.getId(), book.getId(), orderCount); Item findBook = itemService...