diff --git a/src/test/java/com/example/g8backend/service/PostServiceRecommendTest.java b/src/test/java/com/example/g8backend/service/PostServiceRecommendTest.java
new file mode 100644
index 0000000..23890ba
--- /dev/null
+++ b/src/test/java/com/example/g8backend/service/PostServiceRecommendTest.java
@@ -0,0 +1,144 @@
+package com.example.g8backend.service;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.example.g8backend.entity.Post;
+import com.example.g8backend.entity.PostView;
+import com.example.g8backend.mapper.CommentMapper;
+import com.example.g8backend.mapper.PostMapper;
+import com.example.g8backend.mapper.PostViewMapper;
+import com.example.g8backend.service.impl.PostServiceImpl;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.sql.Timestamp;
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+@Transactional
+public class PostServiceRecommendTest {
+
+    @Mock
+    private PostMapper postMapper;
+
+    @Mock
+    private PostViewMapper postViewMapper;
+
+    @Mock
+    private CommentMapper commentMapper;
+
+    @InjectMocks
+    private PostServiceImpl postService;
+
+    private Post mockPost;
+    private PostView mockPostView;
+
+    @BeforeEach
+    void setUp() {
+        // 初始化测试数据
+        mockPost = new Post()
+                .setPostId(1L)
+                .setUserId(100L)
+                .setPostTitle("Test Post")
+                .setViewCount(50)
+                .setCreatedAt(Timestamp.from(Instant.now().minusSeconds(7200)))
+                .setHotScore(5.0);
+
+        mockPostView = new PostView()
+                .setViewId(1L)
+                .setUserId(200L)
+                .setPostId(1L)
+                .setViewTime(Timestamp.from(Instant.now()).toLocalDateTime());
+    }
+
+    @Test
+    public void testGetRecommendedPosts_ExcludesViewedPosts() {
+        // 模拟用户已浏览的帖子ID
+        Long userId = 200L;
+        when(postViewMapper.findViewedPostIds(userId))
+                .thenReturn(Arrays.asList(1L, 2L));
+
+        // 模拟推荐结果（未浏览的帖子）
+        Post recommendedPost = new Post().setPostId(3L).setHotScore(8.0);
+        when(postMapper.selectPage(any(Page.class), any(QueryWrapper.class)))
+                .thenReturn(new Page<Post>().setRecords(Collections.singletonList(recommendedPost)));
+
+        // 调用推荐接口
+        Page<Post> result = postService.getRecommendedPosts(1, 10, userId);
+
+        // 验证结果
+        assertEquals(1, result.getRecords().size(), "应返回1条推荐结果");
+        assertEquals(3L, result.getRecords().get(0).getPostId(), "推荐结果应为未浏览的帖子ID 3");
+        assertFalse(result.getRecords().stream().anyMatch(p -> p.getPostId() == 1L), "结果中不应包含已浏览的帖子ID 1");
+    }
+
+    @Test
+    public void testGetRecommendedPosts_NoViewedPosts() {
+        // 模拟用户未浏览任何帖子
+        Long userId = 300L;
+        when(postViewMapper.findViewedPostIds(userId))
+                .thenReturn(Collections.emptyList());
+
+        // 模拟推荐结果（所有帖子按热度排序）
+        Post post1 = new Post().setPostId(1L).setHotScore(7.5);
+        Post post2 = new Post().setPostId(2L).setHotScore(9.0);
+        when(postMapper.selectPage(any(Page.class), any(QueryWrapper.class)))
+                .thenReturn(new Page<Post>().setRecords(Arrays.asList(post2, post1)));
+
+        // 调用推荐接口
+        Page<Post> result = postService.getRecommendedPosts(1, 10, userId);
+
+        // 验证结果
+        assertEquals(2, result.getRecords().size(), "应返回所有帖子");
+        assertEquals(2L, result.getRecords().get(0).getPostId(), "热度更高的帖子应排在前面");
+    }
+
+    @Test
+    public void testCalculateHotScores_UpdatesHotScoreCorrectly() {
+        // 设置存根
+        when(postMapper.selectList(any(QueryWrapper.class)))
+                .thenReturn(Collections.singletonList(mockPost));
+        when(postMapper.selectLikeCount(anyLong())).thenReturn(30L);
+        when(commentMapper.selectCountByPostId(anyLong())).thenReturn(20L);
+        when(postMapper.batchUpdateHotScore(anyList())).thenReturn(1);
+
+        // 执行并验证
+        postService.calculateHotScores();
+        double expectedScore = (Math.log(51) * 0.2 + 30 * 0.5 + 20 * 0.3) / Math.pow(4, 1.5);
+        assertEquals(expectedScore, mockPost.getHotScore(), 0.01);
+        verify(postMapper).batchUpdateHotScore(anyList());
+    }
+
+    //--------------------- 测试冷启动逻辑 ---------------------
+    @Test
+    public void testCreatePost_SetsInitialHotScore() {
+        Post newPost = new Post().setPostId(4L).setPostTitle("New Post");
+        postService.createPost(newPost);
+
+        assertEquals(5.0, newPost.getHotScore(), "新帖子的初始热度应为5.0");
+        assertNotNull(newPost.getCreatedAt(), "创建时间不应为空");
+    }
+    @Test
+    public void testConcurrentViewCountUpdate() {
+        // 设置存根
+        doNothing().when(postMapper).incrementViewCount(anyLong());
+
+        postService.recordViewHistory(100L, 1L);
+        postService.recordViewHistory(200L, 1L);
+
+        verify(postMapper, times(2)).incrementViewCount(1L);
+        verify(postViewMapper, times(2)).insert(any(PostView.class));
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/com/example/g8backend/service/PostServiceTest.java b/src/test/java/com/example/g8backend/service/PostServiceTest.java
index 9f8fb14..5d19711 100644
--- a/src/test/java/com/example/g8backend/service/PostServiceTest.java
+++ b/src/test/java/com/example/g8backend/service/PostServiceTest.java
@@ -1,6 +1,7 @@
 package com.example.g8backend.service;
 
 import com.example.g8backend.entity.Post;
+import com.example.g8backend.mapper.CommentMapper;
 import com.example.g8backend.mapper.PostMapper;
 import com.example.g8backend.mapper.PostViewMapper;
 import com.example.g8backend.service.impl.PostServiceImpl;
@@ -30,6 +31,9 @@
     @Mock
     private PostViewMapper postViewMapper;
 
+    @Mock
+    private CommentMapper commentMapper;
+
     private PostServiceImpl postService;
 
     private Post testPost;
@@ -37,7 +41,7 @@
     @BeforeEach
     void setUp() {
         MockitoAnnotations.openMocks(this);
-        postService = new PostServiceImpl(postMapper, postViewMapper);
+        postService = new PostServiceImpl(postMapper, postViewMapper,commentMapper);
         testPost = createTestPost();
     }