仅当套件运行时测试才会出现 HttpMediaTypeNotAcceptableException

Question

我是 Spring 开发的新手，正在尝试学习。安装了 Netbeans 11.1 并克隆了这个git 存储库并尝试让这个 VideoController 通过。我很惊讶为什么 testAddGetVideo() 测试在组中运行时失败，但在单独运行时却通过。测试套件在这里。纠结了好几天了。通读SO和其他帖子。testAddGetVideo 在测试套件中失败，但个别测试通过（向下滚动查看下文）在堆栈跟踪中有一个org.springframework.web.HttpMediaTypeNotAcceptableException测试添加获取视频（）：@Testpublic void testAddGetVideo() throws Exception {    videoSvc.addVideo(video);    Collection<Video> stored = videoSvc.getVideoList();    assertTrue(stored.contains(video));}它调用的我的 VideoController 方法：/** * getVideos * * @return Collection<Video> */@RequestMapping(value = VIDEO_SVC_PATH, method = RequestMethod.GET)public @ResponseBody Collection<Video> getVideos(HttpServletResponse response) {    System.out.println("---------------getVideos---------------");    System.out.println(videos.size() + " videos");    System.out.println("===================");    response.setContentType("application/json");    response.setStatus(200);    return videos.values();}/** * newVideo * * @param v * @return Video */@RequestMapping(value = VIDEO_SVC_PATH, method = RequestMethod.POST)public @ResponseBody Video newVideo(@RequestBody Video v) {    System.out.println("---------------newVideo---------------");    checkAndSetId(v);    String url = getDataUrl(v.getId());    v.setDataUrl(url);    videos.put(v.getId(), v);    System.out.println("video " + v.getId() + " at " + v.getDataUrl());    System.out.println("===================");    return v;}视频服务public static final String VIDEO_SVC_PATH = "/video";public static final String VIDEO_DATA_PATH = VIDEO_SVC_PATH + "/{id}/data";/** * This endpoint in the API returns a list of the videos that have * been added to the server. The Video objects should be returned as * JSON.  *  * To manually test this endpoint, run your server and open this URL in a browser: * http://localhost:8080/video *  * @return */

Answer 1

不知道为什么，但下面的更改修复了它。问题可能出在自动化测试上。

@Test

public void testGetNonExistantVideosData() throws Exception {

    long nonExistantId = getInvalidVideoId();

    try{

        Response r = videoSvc.getData(nonExistantId);

        assertEquals(404, r.getStatus());

    }catch(RetrofitError e){

        assertEquals(404, e.getResponse().getStatus());

    }

}

我的方法签名如下。我将方法更改为当传入无效 id 作为参数时返回 null，并且仅当传入有效 id 并且二进制视频 mpeg 数据成功写入 HttpServletResponse.Outputstream 时才返回 VideoStatus。

换句话说，做 aresponse.sendError()也需要 a return null;。

   @RequestMapping(value = VIDEO_DATA_PATH, method = RequestMethod.POST)

    public @ResponseBody VideoStatus uploadVideo(@PathVariable("id") long id, @RequestParam("data") MultipartFile data, HttpServletResponse response) {

        VideoStatus status = new VideoStatus(VideoStatus.VideoState.READY);