[김영한 스프링] 05. 새로운 할인 정책 개발

 

RateDiscountPolicy 추가

 

RateDiscountPolicy.java

main/java/hello.core/discount/RateDiscountPolicy 생성

 

메서드 구현

 

package hello.core.discount;

import hello.core.member.Grade;
import hello.core.member.Member;

public class RateDiscountPolicy implements DiscountPolicy {
    private int discountPercent = 10; // 할인율
    
    @Override
    public int discount(Member member, int price) {
        if (member.getGrade() == Grade.VIP) {
            return price * discountPercent / 100;
        } else {
            return 0;
        }
    }
}

등급이 VIP인 사람들만 10% 할인 하도록

 

RateDiscountPolicyTest.java

test 클래스를 자동으로 만들어 줌

test/java/hello.core/discount/RateDiscountPolicyTest

 

package hello.core.discount;

import hello.core.member.Grade;
import hello.core.member.Member;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

class RateDiscountPolicyTest {
    RateDiscountPolicy discountPolicy = new RateDiscountPolicy();
    
    @Test
    @DisplayName("VIPsms 10% 할인이 적용되어야 한다.")
    void vip_o() {
        // given
        Member member = new Member(1L, "memberVIP", Grade.VIP);
        
        // when
        int discount = discountPolicy.discount(member, 10000);
        
        // then
        Assertions.assertThat(discount).isEqualTo(1000);
    }
    
    @Test
    @DisplayName("VIP가 아니면 할인이 적용되지 않아야 한다.")
    void vip_x() {
        // given
        Member member = new Member(2L, "memberBASIC", Grade.BASIC);
        
        // when
        int discount = discountPolicy.discount(member, 10000);
        
        // then
        Assertions.assertThat(discount).isEqualTo(0);
    }
}

 

 

출처 : https://www.inflearn.com/course/%EC%8A%A4%ED%94%84%EB%A7%81-%ED%95%B5%EC%8B%AC-%EC%9B%90%EB%A6%AC-%EA%B8%B0%EB%B3%B8%ED%8E%B8

스프링 핵심 원리 - 기본편 - 인프런 | 강의