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test: 상품 상세 조회 시 랭킹 정보 테스트 추가
- ProductFacadeTest: 랭킹 포함/미포함 단위 테스트 - ProductV1ApiE2ETest: 랭킹 정보 E2E 테스트
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‎apps/commerce-api/src/test/java/com/loopers/application/product/ProductFacadeTest.java‎

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package com.loopers.application.product;
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import com.loopers.application.event.product.ProductViewedEvent;
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import com.loopers.domain.common.vo.Money;
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import com.loopers.domain.like.service.LikeReadService;
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import com.loopers.domain.product.service.ProductReadService;
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import com.loopers.domain.product.vo.Stock;
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import com.loopers.infrastructure.cache.ProductDetailCache;
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import com.loopers.infrastructure.cache.ProductListCache;
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import com.loopers.infrastructure.cache.ProductRankingCache;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.Nested;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import org.mockito.ArgumentCaptor;
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import org.mockito.InjectMocks;
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import org.mockito.Mock;
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import org.mockito.junit.jupiter.MockitoExtension;
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import org.springframework.context.ApplicationEventPublisher;
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import java.util.Optional;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.mockito.ArgumentMatchers.any;
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import static org.mockito.ArgumentMatchers.anyLong;
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import static org.mockito.Mockito.*;
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@ExtendWith(MockitoExtension.class)
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class ProductFacadeTest {
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@Mock
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private ProductReadService productReadService;
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@Mock
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private LikeReadService likeReadService;
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@Mock
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private ProductDetailCache productDetailCache;
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@Mock
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private ProductListCache productListCache;
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@Mock
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private ProductRankingCache productRankingCache;
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@Mock
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private ApplicationEventPublisher eventPublisher;
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@InjectMocks
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private ProductFacade productFacade;
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private static final Long PRODUCT_ID = 100L;
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private static final Long MEMBER_ID = 1L;
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private static final Long BRAND_ID = 10L;
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private ProductDetailInfo createCachedProductDetailInfo() {
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return ProductDetailInfo.builder()
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.id(PRODUCT_ID)
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.name("테스트 상품")
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.description("테스트 설명")
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.brandId(BRAND_ID)
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.brandName("테스트 브랜드")
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.brandDescription("브랜드 설명")
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.price(Money.of(10000))
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.stock(Stock.of(100))
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.likeCount(50)
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.isLikedByMember(false)
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.ranking(null)
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.build();
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}
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@DisplayName("상품 상세 조회 (getProductDetail)")
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@Nested
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class GetProductDetail {
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@DisplayName("랭킹에 존재하는 상품이면 순위가 포함되어 반환된다")
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@Test
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void shouldIncludeRanking_whenProductIsRanked() {
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// given
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ProductDetailInfo cachedInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.of(cachedInfo));
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when(likeReadService.isLikedBy(MEMBER_ID, PRODUCT_ID)).thenReturn(false);
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(5); // 5위
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// when
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ProductDetailInfo result = productFacade.getProductDetail(PRODUCT_ID, MEMBER_ID);
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// then
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assertThat(result.getRanking()).isEqualTo(5);
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verify(productRankingCache).getRank(PRODUCT_ID);
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}
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@DisplayName("랭킹에 존재하지 않는 상품이면 순위가 null로 반환된다")
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@Test
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void shouldReturnNullRanking_whenProductIsNotRanked() {
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// given
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ProductDetailInfo cachedInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.of(cachedInfo));
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when(likeReadService.isLikedBy(MEMBER_ID, PRODUCT_ID)).thenReturn(false);
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(null); // 순위권 밖
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// when
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ProductDetailInfo result = productFacade.getProductDetail(PRODUCT_ID, MEMBER_ID);
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// then
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assertThat(result.getRanking()).isNull();
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verify(productRankingCache).getRank(PRODUCT_ID);
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}
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@DisplayName("랭킹 1위 상품이면 순위가 1로 반환된다")
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@Test
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void shouldReturnRanking1_whenProductIsFirstPlace() {
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// given
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ProductDetailInfo cachedInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.of(cachedInfo));
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when(likeReadService.isLikedBy(MEMBER_ID, PRODUCT_ID)).thenReturn(true);
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(1); // 1위
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// when
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ProductDetailInfo result = productFacade.getProductDetail(PRODUCT_ID, MEMBER_ID);
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// then
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assertThat(result.getRanking()).isEqualTo(1);
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assertThat(result.isLikedByMember()).isTrue();
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}
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@DisplayName("비로그인 사용자도 랭킹 정보가 포함되어 반환된다")
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@Test
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void shouldIncludeRanking_whenUserNotLoggedIn() {
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// given
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ProductDetailInfo cachedInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.of(cachedInfo));
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(10); // 10위
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// when
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ProductDetailInfo result = productFacade.getProductDetail(PRODUCT_ID, null);
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// then
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assertThat(result.getRanking()).isEqualTo(10);
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assertThat(result.isLikedByMember()).isFalse();
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verify(likeReadService, never()).isLikedBy(anyLong(), anyLong());
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}
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@DisplayName("캐시 miss 시 DB 조회 후에도 랭킹 정보가 포함된다")
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@Test
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void shouldIncludeRanking_whenCacheMiss() {
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// given
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ProductDetailInfo dbInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.empty()); // 캐시 miss
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when(productReadService.getProductDetail(PRODUCT_ID, null)).thenReturn(dbInfo);
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when(likeReadService.isLikedBy(MEMBER_ID, PRODUCT_ID)).thenReturn(false);
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(3);
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// when
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ProductDetailInfo result = productFacade.getProductDetail(PRODUCT_ID, MEMBER_ID);
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// then
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assertThat(result.getRanking()).isEqualTo(3);
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verify(productDetailCache).set(PRODUCT_ID, dbInfo); // 캐시 저장 확인
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verify(productRankingCache).getRank(PRODUCT_ID);
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}
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@DisplayName("상품 조회 이벤트가 발행된다")
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@Test
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void shouldPublishProductViewedEvent() {
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// given
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ProductDetailInfo cachedInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.of(cachedInfo));
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when(likeReadService.isLikedBy(MEMBER_ID, PRODUCT_ID)).thenReturn(false);
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(5);
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// when
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productFacade.getProductDetail(PRODUCT_ID, MEMBER_ID);
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// then
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ArgumentCaptor<ProductViewedEvent> eventCaptor = ArgumentCaptor.forClass(ProductViewedEvent.class);
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verify(eventPublisher).publishEvent(eventCaptor.capture());
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ProductViewedEvent capturedEvent = eventCaptor.getValue();
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assertThat(capturedEvent.productId()).isEqualTo(PRODUCT_ID);
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assertThat(capturedEvent.memberId()).isEqualTo(MEMBER_ID);
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assertThat(capturedEvent.brandId()).isEqualTo(BRAND_ID);
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}
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@DisplayName("다른 필드들이 올바르게 유지된다")
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@Test
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void shouldPreserveOtherFields() {
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// given
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ProductDetailInfo cachedInfo = createCachedProductDetailInfo();
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when(productDetailCache.get(PRODUCT_ID)).thenReturn(Optional.of(cachedInfo));
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when(likeReadService.isLikedBy(MEMBER_ID, PRODUCT_ID)).thenReturn(true);
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when(productRankingCache.getRank(PRODUCT_ID)).thenReturn(7);
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// when
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ProductDetailInfo result = productFacade.getProductDetail(PRODUCT_ID, MEMBER_ID);
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// then
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assertThat(result.getId()).isEqualTo(PRODUCT_ID);
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assertThat(result.getName()).isEqualTo("테스트 상품");
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assertThat(result.getDescription()).isEqualTo("테스트 설명");
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assertThat(result.getBrandId()).isEqualTo(BRAND_ID);
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assertThat(result.getBrandName()).isEqualTo("테스트 브랜드");
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assertThat(result.getBrandDescription()).isEqualTo("브랜드 설명");
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assertThat(result.getPrice().getAmount().intValue()).isEqualTo(10000);
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assertThat(result.getStock().getQuantity()).isEqualTo(100);
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assertThat(result.getLikeCount()).isEqualTo(50);
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assertThat(result.isLikedByMember()).isTrue();
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assertThat(result.getRanking()).isEqualTo(7);
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}
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}
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}

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