### Question:
Order { public String getId() { return id; } private  Order(Builder builder); String getId(); @Deprecated long getAmount(); String getCurrencyCode(); Date getPurchaseDate(); List<LineItem> getLineItems(); @Nullable String getCustomerOrderId(); @Nullable Customer getCustomer();  }### Answer:
@Test public void orderLineItem_verifyDefaultValues() { Order.LineItem lineItem = new Order.LineItem.Builder("123", 100).build(); assertEquals(lineItem.getId(), "123"); assertEquals(lineItem.getTotal(), 100); assertEquals(lineItem.getQuantity(), 1); assertNull(lineItem.getDescription()); assertNull(lineItem.getSku()); assertNull(lineItem.getUpc()); assertNull(lineItem.getCategory()); assertNull(lineItem.getAttributes()); }
@Test public void customer_verifyDefaultValues() { Order.Customer customer = new Order.Customer.Builder("123").build(); assertEquals(customer.getId(), "123"); assertNull(customer.getEmail()); }