如何使用 MockHttpServletRequest 对文件上传进行单元测试？

我有一个 Spring (3.0) 控制器，其方法具有HttpServletRequest作为参数之一，因为它正在处理（多个）文件上传。

@RequestMapping(value = "/classified/{idClassified}/dealer/{idPerson}/upload",
    method = RequestMethod.POST)
@ResponseBody
public final String uploadClassifiedPicture(
    @PathVariable int idClassified,
    @PathVariable int idPerson, 
    @RequestParam String token, 
    HttpServletRequest request);

如何进行单元测试？我知道我可以创建一个MockHttpServletRequest，但我不知道如何将一个或多个文件传递给它。

MockHttpServletRequest request = new MockHttpServletRequest("POST", 
     "/classified/38001/dealer/54/upload?token=dfak241adf");

我建议稍微更改方法签名，以使上传的文件成为普通参数（类型为MultipartFile http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/web/multipart/MultipartFile.html (not CommonsMultipartFile http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/web/multipart/commons/CommonsMultipartFile.html)):

@RequestMapping(value = "/classified/{idClassified}/dealer/{idPerson}/upload",
    method = RequestMethod.POST)
@ResponseBody
public final String uploadClassifiedPicture(
    @PathVariable int idClassified,
    @PathVariable int idPerson, 
    @RequestParam String token, 
    @RequestParam MultipartFile content);

然后你可以使用MockMultipartFile http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/mock/web/MockMultipartFile.html在你的测试中：

final String fileName = "test.txt";
final byte[] content = "Hallo Word".getBytes();
MockMultipartFile mockMultipartFile =
       new MockMultipartFile("content", fileName, "text/plain", content);

uploadClassifiedPicture(1, 1, "token", mockMultipartFile);

如果您不想更改方法签名，那么您可以使用MockMultipartHttpServletRequest http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/mock/web/MockMultipartHttpServletRequest.html反而。

它有一个方法addFile(MultipartFile file) http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/mock/web/MockMultipartHttpServletRequest.html#addFile%28org.springframework.web.multipart.MultipartFile%29。当然，所需的参数可以是MockMultipartFile.