如何使用mocha中的文件上传进行单元测试 [英] How to unit test with a file upload in mocha

问题描述

我有一个基于Express.js的应用程序，我想测试文件上传功能。我正在尝试重现被解析为req.files的对象（使用express.bodyParser中间件时）。我该怎么做？

I have an app built on Express.js and I'd like to test the file upload functionality. I'm trying to reproduce the object parsed to req.files (when using express.bodyParser middleware). How can I do this?

推荐答案

你可以直接在摩卡车上做，但这有点棘手。以下是一个发布图片的示例：

You can do this directly in Mocha but it's a bit tricky. Here's an example posting an image:

var filename = 'x.png'
  , boundary = Math.random()

request(app)
  .post('/g/' + myDraftGallery._id)
  .set('Content-Type', 'multipart/form-data; boundary=' + boundary)
  .write('--' + boundary + '\r\n')
  .write('Content-Disposition: form-data; name="image"; filename="'+filename+'"\r\n')
  .write('Content-Type: image/png\r\n')
  .write('\r\n')
  .write(fs.readFileSync('test/'+filename))
  .write('\r\n--' + boundary + '--')
  .end(function(res){
    res.should.have.status(200)
    done()
  })

Content-Disposition的名称参数是您的文件可以通过req.files访问（所以req.files。图像为我的例子）
您还可以使用像这样的数组值：name =images []和您的文件wil我可以通过一个数组，例如：req.files.images [0]

The name parameter of Content-Disposition is what your file will be accessible as via req.files (so req.files.image for my example) You can also use an array value like this: name="images[]" and your file(s) will be available via an array, e.g: req.files.images[0]

如果你还没有使用它，你应该看看这个摩卡/快递测试〜〜位〜更容易）：
https://github.com/visionmedia/express/blob/master/test/support/http.js

Also if you're not already using it you should have a look at this (makes mocha/express testing a ~bit~ easier): https://github.com/visionmedia/express/blob/master/test/support/http.js

修改 ：由于Express 3-beta5，表达使用最高。要查看旧的http.js代码，请看这里： https ：//github.com/visionmedia/express/blob/3.0.0beta4/test/support/http.js
或者简单地移到最上面..

Edit: Since express 3-beta5, express uses supertest. To look at the old http.js code look here: https://github.com/visionmedia/express/blob/3.0.0beta4/test/support/http.js Or simply move over to supertest..

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