Java 如何在Spring中用Mock编写commonmultipartfile的单元测试

我正在使用Spring3.0org.springframework.web.multipart.commons.commons多部分文件上传文件。我想写下使用Mockito上传文件的单元测试用例

下面是我的控制器类

private RegistrationService registrationService;

@RequestMapping(method = RequestMethod.POST)
    public String create(Registration registration, BindingResult result,ModelMap model)
            throws NumberFormatException, Exception {
        
        File uploadedFile = uploadFile(registration);
        List<Registration> userDetails = new ArrayList<Registration>();
        processUploadedFile(uploadedFile,userDetails);
        
        model.addAttribute("userDetails", userDetails);
        
        return "Registration";
    }
    
    private File uploadFile(Registration registration) {
        
        Date dt = new Date();
        SimpleDateFormat format = new SimpleDateFormat("MM_dd_yyyy_HH_mm_ss");
        File uploadedFile = new File(uploadFileLocation
                + registration.getFileData().getOriginalFilename() + "."
                + format.format(dt));
         
        try {
            registration.getFileData().transferTo(uploadedFile);
            
        } catch (IllegalStateException e) {
            logger.error("Error occurred while uploading file", e);  
        } catch (IOException e) {
            logger.error("Error occurred while uploading file", e);
        }   
        
        return uploadedFile;
    }

    private void processUploadedFile(File uploadedFile, List<Registration> userDetails)
            throws NumberFormatException, Exception {

        registrationService.processFile(uploadedFile, userDetails);
    }

我的服务类方法

public void processFile(File uploadedFile,
            List<Registration> userDetails) throws NumberFormatException,
            Exception {     

        String record = "";

        try {

            FileWriter fstream = new FileWriter(outputFileLocation
                    + uploadedFile.getName());
            BufferedWriter out = new BufferedWriter(fstream);

            BufferedReader br = new BufferedReader(new FileReader(
                    uploadedFile.getAbsolutePath()));

            while ((record = br.readLine()) != null) {
                String[] requesterUser = record.split(",");

                if (insertUserToDB(requesterUser, userDetails) > 0)
                    out.write(record + ", Yes");
                else
                    out.write(record + ", No");

                out.newLine();

            }
            out.flush();
            out.close();

        } catch (FileNotFoundException e) {
            logger.error("Error occured while processing file",  e);
        } catch (IOException e) {
            
            logger.error("Error occured while processing file",  e);
        }

        
    }

---

我是朱尼特和莫基托的新手。任何帮助或指针都很欣赏。

您可能想考虑使用Spring的模拟实现（），而不是使用MOCKITO创建模拟。

< P> Heinrich Filter是正确的，但是您还需要将字段

fileData

的类型从

commonmulitpartfile

更改为

org.springframework.web.multipart.MultipartFile

。（这是上面的超级接口

commonmulitpartfile

和

MockMultipartFile

）

如果您已经这样做了，那么您可以使用spring提供的mock对象来创建多部分文件的mock

MockMultipartFile mockMultipartFile = new MockMultipartFile(
    "fileData",
    fileName,
    "text/plain",
    content);

---

我使用org.springframework.web.multipart.MultipartFile写下了测试方法，但对于MultipartFile，它返回空值。我想，这是因为您没有在MockMultipartFile对象中放入任何内容（请参见我回答中的示例）。顺便说一句：测试中的强制转换是不需要的！

@Test
       public void testProcessFile() {
        private static final String TEST_FILE = "c:\\user.csv";
        MockMultipartHttpServletRequest request = new MockMultipartHttpServletRequest();
        MockMultipartHttpServletRequest mockMultipartHttpServletRequest = (MockMultipartHttpServletRequest)request;
        MultipartFile multipartFile = (MultipartFile) mockMultipartHttpServletRequest.getFile(TEST_FILE);

        Registration registration=new Registration();
        registration.setFileData(multipartFile);
        RegistrationService.processFile(uploadedFile, userDetails);
        }

MockMultipartFile mockMultipartFile = new MockMultipartFile(
    "fileData",
    fileName,
    "text/plain",
    content);