Spring Boot：文件上传测试

Question

I'm trying to create a Unit test in a Spring REST application. the test is related to an endpoint for MultipartFile uploading.

Here is the arguments that my method accepts within my @RestController

@PostMapping("/upload")
    public ResponseEntity uploadFile(@HasFileName @RequestParam("file") MultipartFile file,
                                     @NotEmpty @RequestParam("entity") String entity, @NotEmpty @RequestParam("language") String language,
                                     @NotEmpty @RequestParam("lastModified") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime lastModifiedDateTime,
                                     @NotEmpty @RequestParam("createdDate") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime createdDateTime)
            throws IOException {

I can't find a way to get this information from the multipart inside the unit test. I can't find documentation on making spring unit test for Spring REST, so any inputs would be appreciated.

@Test
    public void testUploadFile() throws Exception{
        ResultMatcher ok = MockMvcResultMatchers.status().isOk();

        String filename = "test.txt";
        File file = new File("/test" + filename);

        file.delete();

        MockMultipartFile mockMultipartFile = new MockMultipartFile("file", "test.txt", "multipart/form-data", "test data".getBytes());

        upload.uploadFile(mockMultipartFile, mockMultipartFile.getName()) //missing more data

        //more logic on how to assert that the file is not empty 


    }

Answer 1

In principle the test should validate the outcome of the uploadFile method():

ResultActions result = 
this.mockMvc.perform(multipart("/svc").file(file)
        .header(HttpHeaders.AUTHORIZATION,
            "Bearer token"))
        .andExpect(content().string("response"))
        .andExpect(status().isOk());

The file is an input parameter so I dont understand why you want to verify it is not empty: it could be useful I believe to verify the interactions with other mocks (for instance checking the file is used in a FileService.save() method)