[스프링 핵심 원리 - 기본편] 새로운 할인 정책 개발

RateDiscountPolicy 코드 추가

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

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;
        }
    }

}

(RateDiscountPolicy.java)

테스트 작성

import hello.core.member.Grade;
import hello.core.member.Member;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

import static org.assertj.core.api.Assertions.assertThat;

class RateDiscountPolicyTest {

    RateDiscountPolicy discountPolicy = new RateDiscountPolicy();

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

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

        // then
        assertThat(discount).isEqualTo(1000);
    }

    @Test
    @DisplayName("VIP가 아니면 할인이 적용되지 않아야 한다")
    void vip_x() {
        // given
        Member member = new Member(2L, "memberVIP", Grade.BASIC);

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

        // then
        assertThat(discount).isEqualTo(0);
    }

}

(RateDiscountPolicyTest.java)

참조

• 스프링 핵심 원리 - 기본편