Cannot read property 'rules' of undefined

[bebetoalves]

Hello, I'm trying to use a validation file in the unit test but I'm not getting it.

Validation file:

'use strict'

class News {
  get rules () {
    return {
      user_id: 'required',
      message: 'required',
    }
  }
}

module.exports = News

My unit test:

const { test } = use('Test/Suite')('News');
const { validate } = use('Validator')

/** @type {typeof import('@adonisjs/lucid/src/Lucid/Model')} */
const News = use('App/Models/News');

const newsValidator = use('App/Validators/News');

test('an user id is required', async ({ assert }) => {
  const data = {
    user_id: '',
    message: 'This is a message',
  };

  const validation = await validate(data, newsValidator.rules);
  assert.isTrue(validation.fails());
});

The following error appears:

1. an user id is required
  TypeError: Cannot read property 'rules' of undefined

[bebetoalves]

Fixed with:

const validation = await validate(data, (new newsValidator).rules);

[thetutlage]

Bug in Javascript? Because as far as I know the class properties can only be accessed from the class instance