[Inflearn] 주문과 할인 도메인 개발

 

이제 주문 도메인을 개발해볼 거다.

 

 

<Order>

package hello.core.order;

public class Order {

    private Long memberId;
    private String itemName;
    private int itemPrice;
    private int discountPrice;

    public Order(Long memberId, String itemName, int itemPrice, int discountPrice) {
        this.memberId = memberId;
        this.itemName = itemName;
        this.itemPrice = itemPrice;
        this.discountPrice = discountPrice;
    }

    public int calculatePrice() {
        return itemPrice - discountPrice;
    }

    public Long getMemberId() {
        return memberId;
    }
    public String getItemName() {
        return itemName;
    }
    public void setItemName(String itemName) {
        this.itemName = itemName;
    }
    public int getItemPrice() {
        return itemPrice;
    }
    public void setItemPrice(int itemPrice) {
        this.itemPrice = itemPrice;
    }
    public int getDiscountPrice() {
        return discountPrice;
    }
    public void setDiscountPrice(int discountPrice) {
        this.discountPrice = discountPrice;
    }

    @Override
    public String toString() {
        return "Order{" +
                "memberId=" + memberId +
                ", itemName='" + itemName + '\'' +
                ", itemPrice=" + itemPrice +
                ", discountPrice=" + discountPrice +
                '}';
    }
}

 

<OrderService> - 인터페이스

package hello.core.order;

public interface OrderService {
    Order createOrder(Long memberId, String itemName, int itemPrice);
}

 

<OrderServiceImpl>

package hello.core.order;

import hello.core.discount.DiscountPolicy;
import hello.core.discount.FixDiscountPolicy;
import hello.core.member.Member;
import hello.core.member.MemberRepository;
import hello.core.member.MemoryMemberRepository;

public class OrderServiceImpl implements OrderService {

    private final MemberRepository memberRepository=new MemoryMemberRepository();
    private final DiscountPolicy discountPolicy=new FixDiscountPolicy()

    @Override
    public Order createOrder(Long memberId, String itemName, int itemPrice) {
        Member member = memberRepository.findById(memberId);
        int discountPrice=discountPolicy.discount(member,itemPrice);

        return new Order(memberId,itemName,itemPrice,discountPrice);
    }
}

 

<OrderApp>

package hello.core;

import hello.core.member.Grade;
import hello.core.member.Member;
import hello.core.member.MemberService;
import hello.core.member.MemberServiceImpl;
import hello.core.order.Order;
import hello.core.order.OrderService;
import hello.core.order.OrderServiceImpl;

public class OrderApp {
    public static void main(String[] args) {
        MemberService memberService = new MemberServiceImpl();
        OrderService orderService = new OrderServiceImpl();

        Long memberId=1L;
        Member member = new Member(memberId, "memberA", Grade.VIP);
        memberService.join(member);

        Order order=orderService.createOrder(memberId,"itemA",10000);

        System.out.println("order = "+order);
    }
}

 

그리고 실행해줄 건데 실행코드는 test 밑에 넣어주면 된다.

 

 

주문 도메인 개발 - OrderServiceTest

 

package hello.core.order;

import hello.core.member.Grade;
import hello.core.member.Member;
import hello.core.member.MemberService;
import hello.core.member.MemberServiceImpl;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.*;

public class OrderServiceTest {
    MemberService memberService = new MemberServiceImpl();
    OrderService orderService = new OrderServiceImpl();

    @Test
    void createOrder(){
        Long memberId=1L;
        Member member=new Member(memberId,"memberA", Grade.VIP);
        memberService.join(member);

        Order order=orderService.createOrder(memberId,"itemA",10000);
        Assertions.assertThat(order.getDiscountPrice()).isEqualTo(1000);
    }
}