anntation이 달려있지 않은 클래스를 AnnotationConfigApplicationContext에 넣을때

oid 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);
          }

              DiscountPolicy discountPolicy = policyMap.get(discountCode);
              System.out.println("discountCode = " + discountCode);

              System.out.println("discountPolicy = " + discountPolicy);
              return discountPolicy.discount(member, price);

} }

}

에서 아무런 어노테이션이 없는 클래스 discountservice클래스를 AnnotationConfigApplicationContext에 넣어주었는데

이것에 대한 동작 방식이 궁금합니다. 수업 내용 상으로는 해당 함수 통해서 생성자 까지는 읽는 것 같은데 @bean 어노테이션이 없는데 어떻게 작동하는지 모르겠습니다