[v4.1] Wrapped provider return undefined

[mike1819]

Hello everyone,
I'm using adonis 4.1 legacy version. I followed this guide https://legacy.adonisjs.com/docs/4.1/service-providers#_npm_package_as_a_service_provider because I want use axios in my application and I want to have only a single instance of it.

That's providers/Http/index.js file. Here the config/http.js is a file with a copy of axios library configurations. The most important is baseURL: 'http://api.chucknorris.io'.

const axios = require('axios');

class HttpService {
  constructor (Config) {
    this.Config = Config
    this.axiosInstance = undefined
  }

  get () {
    if (this.axiosInstance) {
      return this.axiosInstance
    }
    
    const config = this.Config.get('http')

    this.axiosInstance = axios.create(config)

    return this.axiosInstance
  }
}

module.exports = HttpService

and that's my providers/Http/Provider.js file.

const { ServiceProvider } = require('@adonisjs/fold')

class HttpProvider extends ServiceProvider {
  register () {
    this.app.singleton('HttpProvider', () => {
      const Config = this.app.use('Adonis/Src/Config')
      return new (require('.'))(Config)
    })
  }
}

module.exports = HttpProvider

I then wrote a stupid test:

const { test } = use('Test/Suite')('Http Provider')
const HttpProvider = use('HttpProvider')

test('Should make a get', async ({ assert }) => {
  const response = await HttpProvider.get('/jokes/random')

  assert.equal(response.status, 200)
})

Finally when I run the test, the response variable looks undefined.

Http Provider
    ✖ Should make a get (7ms)


   ERRORS 

  1. Should make a get
  expected undefined to equal 200
  undefined => 200

   FAILED 

  total       : 1
  failed      : 1
  time        : 22ms

I cannot understand why this behaviour. Is it possible to make the library work in this way?

Thank you