How to carry unit test on router function NodeJS / Mocha / Chai

Question

How should it seems, if I want carry unit tests on this router :

router
.post('/set-permission', (req, res) => {
    Board.updateBoard(req.body)
        .then(resp => { 
            console.log(resp.permissions);
            res.json(resp.permissions);
        })
})

module.exports = router;

I have folder in project/test inside is file .js with required chai library. Now I should execute this function with parameter? But how? Could someone explain me??

Answer 1

You can use chai.http for this, which allows you to test HTTP apps. Just make sure to export your app as you already do.

// api.spec.js
const chai = require('chai')
const chaiHttp = require('chai-http')
const server = require('../app.js')

chai.should()
chai.use(chaiHttp)

describe('User permissions', () => {
  it('sets the user permissions', () => {
    // Notice we are sending the request to the `server` export instead
    // of a URL
    return chai.request(server)
      .post('/set-permission')
      .then(res => {
        res.should.have.status(200)
        // add more tests here as you see fit
      })
      .catch(err => {
         throw err
      })
  })
})

Also note that this more of an integration test rather than a unit test.