InjectBeanIntoEnumTest.java

InjectBeanIntoEnumTest.java

// MemberType.java

@Getter
public enum MemberType {
    GOLD("골드"),
    SILVER("실버")
    ;

    private String desc;

    private MemberDiscountPolicy memberDiscountPolicy;

    MemberType(String desc) {
        this.desc = desc;
    }
    
    @Component
    @RequiredArgsConstructor
    private static class MemberTypeInjector {
        private final GoldMemberDiscountPolicy goldMemberDiscountPolicy;
        private final SilverMemberDiscountPolicy silverMemberDiscountPolicy;
        @PostConstruct
        public void postConstruct() {
            MemberType.GOLD.injectMemberDiscountPolicy(goldMemberDiscountPolicy);
            MemberType.SILVER.injectMemberDiscountPolicy(silverMemberDiscountPolicy);
        }
    }

    private void injectMemberDiscountPolicy(MemberDiscountPolicy memberDiscountPolicy) {
        this.memberDiscountPolicy = memberDiscountPolicy;
    }
}


// MemberDiscountPolicy.java
public interface MemberDiscountPolicy {
    String getDiscountRate();
}



// GoldMemberDiscountPolicy.java
@Component
@RequiredArgsConstructor
public class GoldMemberDiscountPolicy implements MemberDiscountPolicy {
    @Override
    public String getDiscountRate() {
        return "30%";
    }
}


// SilverMemberDiscountPolicy.java
@Component
@RequiredArgsConstructor
public class SilverMemberDiscountPolicy implements MemberDiscountPolicy {
    @Override
    public String getDiscountRate() {
        return "10%";
    }
}






// MemberTypeTest.java
@ExtendWith(SpringExtension.class)
@SpringBootTest
public class MemberTypeTest {

    @Test
    @DisplayName("Enum Bean 주입 테스트")
    public void injectBeanIntoEnumTest() throws Exception {
        MemberType memberType = MemberType.GOLD;
        String discountRate = memberType.getMemberDiscountPolicy().getDiscountRate();
        Assertions.assertEquals("30%", discountRate);

        memberType = MemberType.SILVER;
        discountRate = memberType.getMemberDiscountPolicy().getDiscountRate();
        Assertions.assertEquals("10%", discountRate);
    }
}