게시글 전체 조회서 최신순으로 반환하도록 수정 (#87)

BACK/spring-app/src/main/java/com/starchive/springapp/post/service/PostService.java

@@ -20,6 +20,7 @@
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -55,7 +56,7 @@ public PostDto findOne(Long postId) {
 
     //todo: fetch join (양방향 연관관계)
     public PostListResponse findPosts(Long categoryId, Long hashTagId, int pageNum, int pageSize) {
-        Pageable pageable = PageRequest.of(pageNum, pageSize);
+        Pageable pageable = PageRequest.of(pageNum, pageSize, Sort.by("createAt").descending());
         List<Long> categoryIds = null;
         if (categoryId != null) {
             Category category = categoryService.findOne(categoryId);

BACK/spring-app/src/test/java/com/starchive/springapp/post/service/PostServiceTest.java

@@ -102,7 +102,7 @@ class PostServiceTest {
         //then
         assertThat(response.getPosts()).hasSize(2);
         assertThat(response.getPosts()).extracting("title").containsExactlyInAnyOrder("title1", "title2");
-        assertThat(response.getPosts().get(0).getHashTags()).extracting("name").containsExactly("tag1");
+        assertThat(response.getPosts().get(1).getHashTags()).extracting("name").containsExactly("tag1");
     }
 
     @Test