Integration Testing REST API with Spring Boot Part 3

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Integration Tests For Saving An Entity

    @Test
    public void addComments_validRequest_statusCreated() throws Exception {

        mvc.perform(post("/posts/1/comments").content("{\"message\": \"test comment\"}")
                .contentType(MediaType.APPLICATION_JSON)).andExpect(status().isCreated()).andDo(print());

    }

    @Test
    public void addComments_invalidRequestWithCommentId_status400() throws Exception {

        mvc.perform(post("/posts/1/comments").content("{\"id\": 1, \"message\": \"test comment2\"}")
                .contentType(MediaType.APPLICATION_JSON)).andExpect(status().isBadRequest()).andDo(print());

    }

    @Test
    public void addComments_invalidPostIdInRequest_status400() throws Exception {

        mvc.perform(post("/posts/-1/comments").content("{\"message\": \"test comment3\"}")
                .contentType(MediaType.APPLICATION_JSON)).andExpect(status().isBadRequest()).andDo(print());

    }

    @Test
    public void addComments_validRequest_returnsCreatedCommentWithIdPostIdAndMessage() throws Exception {

        mvc.perform(post("/posts/4/comments").content("{\"message\": \"test comment4\"}")
                .contentType(MediaType.APPLICATION_JSON)).andExpect(jsonPath("$.id", is(greaterThan(0))))
                .andExpect(jsonPath("$.postId", is(4))).andExpect(jsonPath("$.message", is("test comment4")))
                .andDo(print());

    }

@ResponseStatus Annotation

In oder to return the proper response status code, the @ResponseStatus annotation could be used on the controller method. If this is not done the default status code will be returned, which is 200.

    @PostMapping("posts/{id}/comments")
    @ResponseStatus(HttpStatus.CREATED)
    public Comment addComment(@RequestBody Comment comment, @PathVariable("id") int postId) {

        validateComment(comment, postId);

        comment.setPostId(postId);

        return commentService.createComment(comment);

    }

Please find the complete source code @ https://github.com/JavaCodeHouse/comments-application