새로운 할인 정책 개발

??? : 할인정책 10%할인으로 바꿔!!

 

1. RateDiscountPolicy class

• DiscountPolicy interface의 구현체
• member와 price정보를 받아 할인 금액 return
  

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

2. 할인금액 Test

• @DisplayName을 입력하면 test결과화면에 해당 내용을 띄울 수 있다.
• Vip일 경우, Vip가 아닐 경우 나눠서 test.

class RateDiscountPolicyTest {

    RateDiscountPolicy rateDiscountPolicy = new RateDiscountPolicy();

    @Test
    @DisplayName("VIP는 10%할인이 적용 되어야 한다.")
    void vip_o() {
        //given
        Member member = new Member(1L, "memberVIP", Grade.VIP);

        //when
        int discountedPrice = rateDiscountPolicy.discount(member, 10000);

        //then
        Assertions.assertThat(discountedPrice).isEqualTo(1000);

    }

    @Test
    @DisplayName("VIP가 아닌 경우 할인 미적용")
    void vip_x(){
        //given
        Member member = new Member(2L, "memberBASIC", Grade.BASIC);

        //when
        int discountedPrice = rateDiscountPolicy.discount(member, 10000);

        //then
        Assertions.assertThat(discountedPrice).isEqualTo(0);
    }
}

 

할인 정책은 잘 돌아간다! 이제 정책을 바꿔서 돌려보자.

 

3. GitHub : 210725, RateDiscountPolicy

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https://github.com/bsh6463/SpringCoreFunction

GitHub - bsh6463/SpringCoreFunction