java - 测试中未抛出 MaxUploadSizeExceededException

Question

我有一个简单的 spring 应用程序，带有一个需要多部分文件的 Controller 。出于测试目的，我设置了 MaxUploadSize大小仅为 50 字节。当我在 tomcat 中部署 war 时，我得到了预期的 MaxUploadSizeExceededException对于较大的文件，但如果我在单元测试中使用相同的文件，则测试不起作用。

配置

@Configuration
@EnableWebMvc
@ComponentScan(basePackageClasses = {...})
public class MyApplication extends WebMvcConfigurerAdapter {

  @Bean
  public CommonsMultipartResolver multipartResolver() {
    CommonsMultipartResolver commonsMultipartResolver =
        new CommonsMultipartResolver();
    commonsMultipartResolver.setDefaultEncoding("utf-8");
    commonsMultipartResolver.setMaxUploadSize(50);
    return commonsMultipartResolver;
  }
}

@RestController
@RequestMapping("/metadata")
public class MyController {

  @RequestMapping(method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA_VALUE,
      produces = MediaType.APPLICATION_JSON_VALUE)
  public String metadata(@RequestParam MultipartFile file)  {
     //some processing...
  }
}

测试

@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(classes = MyApplication.class)
public class MyControllerTest {
...
@Test
  public void testDocx() throws Exception {
    byte[] docx = FileUtils.readFileToByteArray(new File(
            "src/test/resources/testdocs/test.docx"));
    MockMultipartFile multipartFile = new MockMultipartFile("file", "test.docx", "", docx);
    this.mvc.perform(fileUpload("/metadata").file(multipartFile))
        .andDo(print()).andExpect(status().is5xxServerError()); 
   //doesn't work, returns 200
  }
}

Spring 版本:4.1.6

Answer 1

我遇到了同样的问题，幸运的是我能够解决它。

我假设 this.mvc是 MockMvc 的一个实例.据此 spring文档:

Another useful approach is to not start the server at all but to test only the layer below that, where Spring handles the incoming HTTP request and hands it off to your controller. That way, almost of the full stack is used, and your code will be called in exactly the same way as if it were processing a real HTTP request but without the cost of starting the server. To do that, use Spring’s MockMvc and ask for that to be injected for you by using the @AutoConfigureMockMvc annotation on the test case.

由于没有启动服务器，这个异常是Tomcat抛出的，所以永远不会抛出。我只需要删除它并使用 TestRestTemplate用于调用端点并像魅力一样工作。有一个很好的例子here .