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강사님이랑 똑같이 따라 쳤는데 위 결과가 나옵니다.. 왜 그런 걸까요?
아래가 제가 쓴 코드입니다.
package hello.core.autowired; import hello.core.AutoAppConfig; import hello.core.discount.DiscountPolicy; import hello.core.member.Grade; import hello.core.member.Member; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import java.util.List; import java.util.Map; import static org.assertj.core.api.Assertions.assertThat; public class AllBeanTest { @Test void findAllBean() { ApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class, DiscountService.class); DiscountService discountService = ac.getBean(DiscountService.class); Member member = new Member(1L, "userA", Grade.VIP); int discountPrice = discountService.discount(member, 10000,"fixDiscountPolicy"); assertThat(discountService).isInstanceOf(DiscountService.class); assertThat(discountPrice).isEqualTo(1000); } static class DiscountService { private final Map<String, DiscountPolicy> policyMap; private final List<DiscountPolicy> policies; public DiscountService(Map<String, DiscountPolicy> policyMap, List<DiscountPolicy> policies) { this.policyMap = policyMap; this.policies = policies; System.out.println("policyMap = " + policyMap); System.out.println("policies = " + policies); } public int discount(Member member, int price, String discountCode) { DiscountPolicy discountPolicy = policyMap.get(discountCode); System.out.println("discountCode = " + discountCode); System.out.println("discountPolicy = " + discountPolicy); return discountPolicy.discount(member, price); } } }
답변 1
0
package hello.core.autowired;
import hello.core.AutoAppConfig;
import hello.core.discount.DiscountPolicy;
import hello.core.member.Grade;
import hello.core.member.Member;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import java.util.List;
import java.util.Map;
import static org.assertj.core.api.Assertions.assertThat;
public class AllBeanTest {
@Test
void findAllBean() {
ApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class, DiscountService.class);
DiscountService discountService = ac.getBean(DiscountService.class);
Member member = new Member(1L, "userA", Grade.VIP);
int discountPrice = discountService.discount(member, 10000, "fixDiscountPolicy");
assertThat(discountService).isInstanceOf(DiscountService.class);
assertThat(discountPrice).isEqualTo(1000);
}
static class DiscountService {
private final Map<String, DiscountPolicy> policyMap;
private final List<DiscountPolicy> policies;
public DiscountService(Map<String, DiscountPolicy> policyMap, List<DiscountPolicy> policies) {
this.policyMap = policyMap;
this.policies = policies;
System.out.println("policyMap = " + policyMap);
System.out.println("policies = " + policies);
}
public int discount(Member member, int price, String discountCode) {
DiscountPolicy discountPolicy = policyMap.get(discountCode);
System.out.println("discountCode = " + discountCode);
System.out.println("discountPolicy = " + discountPolicy);
return discountPolicy.discount(member, price);
}
}
}
DiscountPolicy discountPolicy = policyMap.get(discountCode);
해당 구문에서 null값을 읽어와 생긴 에러입니다. 적어주신 코드만으로는확인이 어렵네요.
public DiscountService(Map<String, DiscountPolicy> policyMap, List<DiscountPolicy> policies)
해당 클래스 생성자가 실행 되었는지 확인해 주시고 강의에서 놓친 부분이 없는지 확인해 주세요.
강의 관련 질문을 올리실때는 강의페이지 -> 커뮤니티 -> 질문 에 글쓰기 하셔야 어느 강의 질문인지 알 수 있고, 강사님이 해당 질문을 확인할 수 있습니다.
코드를 함께 첨부해주실 때는 코드정렬 후 첨부해주시면 더욱 편할 것 같습니다.
에러 메시지 또한 전체를 첨부해주시면 도움 드리기 더욱 편할 것 같습니다.