complete_postservice_test_code

Change-Id: If176a0ac12d71e7695635761e7199c03926e4c85
diff --git a/src/main/java/com/example/g8backend/service/IPostService.java b/src/main/java/com/example/g8backend/service/IPostService.java
index 58c13dc..f81053e 100644
--- a/src/main/java/com/example/g8backend/service/IPostService.java
+++ b/src/main/java/com/example/g8backend/service/IPostService.java
@@ -2,9 +2,14 @@
 
 import com.example.g8backend.entity.Post;
 import com.baomidou.mybatisplus.extension.service.IService;
-
 import java.util.List;
 
 public interface IPostService extends IService<Post> {
     List<Post> getPostsByUserId(Long userId);
+    Post createPost(Post post);
+    Post updatePost(Post post);
+    List<Post> getPostsByType(String postType);
+    Long getPostLikeCount(Long postId);
+    void likePost(Long userId, Long postId);
+    void unlikePost(Long userId, Long postId);
 }