Can't use beforeEach mocha hooks

[armonge]

Due to the way the conversation is executed mocha hooks like beforeEach are not actually executed before tests run

For example in the following code the UserStorage class has get and put methods that make requests to DynamoDB. I would like to mock those methods using simple mock

const User = require('../services/User');
const UserStorage = require('../services/UserStorage');
const simple = require('simple-mock');
const conversation = require('alexa-conversation');
const app = require('../skill'); // your Alexa skill's main file.

describe('Launch', () => {
  const opts = { // those will be used to generate the requests to your skill
    name: 'Set name',
    appId: 'your-app-id',
    app,
  };

  beforeEach(() => {
    simple.mock(UserStorage.prototype, 'get')
      .resolveWith(new User());

    simple.mock(UserStorage.prototype, 'put')
      .resolveWith();
  });

  afterEach(() => {
    simple.restore();
  });

  // initialize the conversation
  conversation(opts)
    .userSays('LaunchIntent') // trigger the first Intent
    .ssmlResponse
    .shouldMatch(/Welcome to Quizduell/)
    .shouldContain('What should be your Game name?')

    .userSays('NameIntent', { name: 'andres' })
    .ssmlResponse
    .shouldContain('I am not quite sure if I\nunderstood correctly. Is it andres?')

    .userSays('AMAZON.YesIntent')
    .ssmlResponse
    .shouldContain('All right, let\'s go. Ask me your questions or start a new game')

    .end();
});