How to unit test with a file upload in mocha

Question

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

Answer 1

If using request promise you can simply do this, sending formData is built into it:

    var options = {
      method: 'POST',
      uri: base + '/api/image/upload',
      formData: {
        someField: 'someValue',
        anotherField: 'anotherValue',
        file: {
          // path to image
          value: fs.createReadStream('./testImg.png'),
          options: {
            filename: 'testImg.png',
            contentType: 'image/png'
          }
        }
      }
    };
    let resp;
    try {
      resp = await request.post(options);
      body = JSON.parse(resp);
    } catch (e) {
      console.log(e);
      resp = e.response;
      code = resp.statusCode;
      body = JSON.parse(resp.body);
    }
    // access what is returned here, check what needs to be
    assert.equal(code, 200, 'Status: ' + code + ': ' + body.error);
    assert.equal(body.success, true);
    assert.exists(body.image);