Spring게시판 만들기

Spring Boot 게시판 만들기 7 - 특정 페이지를 가져오기

7. 특정 포스트를 불러오기

특정 포스트 불러오기 요청 처리하기

PostController

@GetMapping("/post/{postId}")
public String getPostDetails(@PathVariable("postId")Long id, Model model){
    Post post = postService.getPostById(id);

    PostDto postDto = PostDto.builder()
            .id(post.getId())
            .name(post.getName())
            .title(post.getTitle())
            .content(post.getContent())
            .writeTime(post.getWriteTime())
            .build();

    model.addAttribute("postDto", postDto);
    return "details";
}

PostControllerTest.java

@Test
@DisplayName("상세 페이지를 가져온다.")
public void getPostDetails() throws Exception{
    Post mockPost = Post.builder()
            .id(1L)
            .name("tester")
            .title("test")
            .content("test")
            .writeTime(LocalDateTime.now())
            .build();

    given(postService.getPostById(any())).willReturn(mockPost);

    ResultActions resultActions = mockMvc.perform(get("/post/1"));

    resultActions
            .andExpect(status().isOk());

    verify(postService).getPostById(any());
}

PostControllerTest.java

@Test
@DisplayName("상세 페이지를 못 가져온다.")
public void getPostDetailsException() throws Exception{
    given(postService.getPostById(any())).willThrow(new PostNotExistedException(1L));

    ResultActions resultActions = mockMvc.perform(get("/post/1"));

    resultActions
            .andExpect(status().isNotFound());

    verify(postService).getPostById(any());
}

포스트가 없는 경우에 대한 예외처리하기

BoardErrorAdvice.java

@ControllerAdvice
public class BoardErrorAdvice {

    @ResponseBody
    @ResponseStatus(HttpStatus.NOT_FOUND)
    @ExceptionHandler(PostNotExistedException.class)
    public void handleNotFound(){
    }
}

PostNotExistedException.java

public class PostNotExistedException extends RuntimeException{
    public PostNotExistedException(Long id){
        super("Post id : " + id + " is not Existed");

    }
}

PostService.java

public Post getPostById(Long id) {
    Post post = postRepository.findById(id).orElseThrow(() -> new PostNotExistedException(id));
    return post;
}

PostServiceTest.java

@Test
@DisplayName("특정 포스트를 가져온다.")
public void getPostById(){
    Post mockPost = Post.builder()
            .id(1L)
            .name("tester")
            .title("test")
            .content("test")
            .writeTime(LocalDateTime.now())
            .build();

    given(postRepository.findById(1L)).willReturn(Optional.of(mockPost));
    Post post = postService.getPostById(1L);
    verify(postRepository).findById(1L);

    assertThat(post.getId()).isEqualTo(mockPost.getId());
    assertThat(post.getTitle()).isEqualTo(mockPost.getTitle());
    assertThat(post.getName()).isEqualTo(mockPost.getName());
    assertThat(post.getContent()).isEqualTo(mockPost.getContent());
    assertThat(post.getWriteTime()).isEqualTo(mockPost.getWriteTime());
}

@Test
@DisplayName("특정 포스트를 못 가져온다.")
public void getPostByIdException(){
    Post mockPost = Post.builder()
            .id(1L)
            .name("tester")
            .title("test")
            .content("test")
            .writeTime(LocalDateTime.now())
            .build();

    given(postRepository.findById(1L)).willThrow(new PostNotExistedException(1L));
    
    assertThatThrownBy(() ->{
        postService.getPostById(1L);
    }).isInstanceOf(PostNotExistedException.class);

    verify(postRepository).findById(1L);
}
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