fix:쿼리 옵션의 모든 조건이 검색 조건으로 활용되도록 수정 (#42)

src/main/java/com/goldbalance/dive/domain/article/repository/article/ArticleCustomRepositoryImpl.java

@@ -4,7 +4,10 @@
 import static com.goldbalance.dive.domain.article.domain.QQuiz.*;
 
 import com.goldbalance.dive.domain.article.domain.Article;
+import com.goldbalance.dive.domain.article.domain.Category;
+import com.goldbalance.dive.domain.article.domain.Duration;
 import com.goldbalance.dive.domain.article.dto.request.ArticleQueryOption;
+import com.querydsl.core.BooleanBuilder;
 import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import java.util.List;
@@ -19,11 +22,26 @@ public class ArticleCustomRepositoryImpl implements ArticleCustomRepository {
     public List<Article> searchArticle(ArticleQueryOption queryOption) {
         return queryFactory
                 .selectFrom(article)
-                .where(containsKeyword(queryOption))
+                .where(matchesQueryOption(queryOption))
                 .fetch();
     }
 
-    private BooleanExpression containsKeyword(ArticleQueryOption queryOption) {
-        return queryOption.keyword() != null ? article.title.containsIgnoreCase(queryOption.keyword()) : null;
+    private BooleanExpression containsKeyword(String keyword) {
+        return keyword != null ? article.title.containsIgnoreCase(keyword) : null;
+    }
+
+    private BooleanExpression eqCategory(Category category) {
+        return category != null ? article.category.eq(category) : null;
+    }
+
+    private BooleanExpression eqDuration(Duration duration) {
+        return duration != null ? article.duration.eq(duration) : null;
+    }
+
+    private BooleanBuilder matchesQueryOption(ArticleQueryOption queryOption) {
+        return new BooleanBuilder()
+                .and(containsKeyword(queryOption.keyword()))
+                .and(eqCategory(queryOption.category()))
+                .and(eqDuration(queryOption.duration()));
     }
 }