Sinon - How to stub authentication library (Authy -Twilio)

问题

I am currently new to Sinon, Mocha, Supertest and in the process to writes tests. In my current scenario, i have authentication library which verifies my "OTP" and after verifying it proceeds to do operation within the callback function.

I am unable to mock the callback to return null and carry on to test rest of the code. Following is my code snippet:

Controller.js


var authy = require('authy')(sails.config.authy.token);
 authy.verify(req.param('aid'), req.param('oid'), function(err, response) {
  console.log(err);
  if (err) {
    return res.badRequest('verification failed.');
  }
....

My test is :

 var authy = require('authy')('token');



describe('Controller', function() {
  before(function() {
    var authyStub = sinon.stub(authy, 'verify');
    authyStub.callsArgWith(2, null, true);
  });

  it('creates a test user', function(done) {
    // This function will create a user again and again.
    this.timeout(15000);
    api.post('my_endpoint')
      .send({
        aid: 1,
        oid: 1
      })
      .expect(201, done);


  });
});

I essentially want to call authy verify get a null as "err" in callback, so i can test the rest of the code.

Any help would be highly appreciated. Thanks

回答1:

The trouble is that you're using different instances of the authy object in your tests and your code. See here authy github repo.

In your code you do

var authy = require('authy')(sails.config.authy.token);

and in your test

var authy = require('authy')('token');

So your stub is generally fine, but it will never work like this because your code does not use your stub.

A way out is to allow for the authy instance in your controller to be injected from the outside. Something like this:

function Controller(authy) {
    // instantiate authy if no argument passed

in your tests you can then do

describe('Controller', function() {
    before(function() {
        var authyStub = sinon.stub(authy, 'verify');
        authyStub.callsArgWith(2, null, true);
        // get a controller instance, however you do it
        // but pass in your stub explicitly
        ctrl = Controller(authyStub);
    });
});

来源：https://stackoverflow.com/questions/40541969/sinon-how-to-stub-authentication-library-authy-twilio

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javascript

twilio

sinon

supertest

authy