src/test/java/edu/bjtu/groupone/backend/PostServiceTest.java

package edu.bjtu.groupone.backend;

import edu.bjtu.groupone.backend.domain.entity.Post;
import edu.bjtu.groupone.backend.mapper.PostMapper;
import edu.bjtu.groupone.backend.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 java.util.Arrays;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.*;

@ExtendWith(MockitoExtension.class)
public class PostServiceTest {

    @Mock
    private PostMapper postMapper;

    @InjectMocks
    private PostServiceImpl postService;

    private Post post;
    private List<Post> posts;

    @BeforeEach
    void setUp() {
        post = new Post(1L, 1, "测试帖子", "内容", "2023-06-15", 100);
        posts = Arrays.asList(post);
    }

    @Test
    void addPost() {
        doNothing().when(postMapper).insertPost(any(Post.class));

        postService.addPost(post);

        verify(postMapper, times(1)).insertPost(post);
    }

    @Test
    void deletePost() {
        doNothing().when(postMapper).deletePost(1L);

        postService.deletePost(1L);

        verify(postMapper, times(1)).deletePost(1L);
    }

    @Test
    void updatePost() {
        doNothing().when(postMapper).updatePost(any(Post.class));

        postService.updatePost(post);

        verify(postMapper, times(1)).updatePost(post);
    }

    @Test
    void getPostById() {
        when(postMapper.selectPostById(1L)).thenReturn(post);

        Post result = postService.getPostById(1L);

        assertEquals(post, result);
    }

    @Test
    void getAllPosts() {
        when(postMapper.selectAllPosts()).thenReturn(posts);

        List<Post> result = postService.getAllPosts();

        assertEquals(posts, result);
    }
}