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const mongodb = require('mongodb');

test();

async function test() {
  const db = await mongodb.MongoClient.connect('mongodb://localhost:27017/test');

  await db.collection('Movies').drop();
  await db.collection('Movies').insertMany([
    { name: 'Enter the Dragon' },

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const cursor = db.collection('Movies').find().map(value => ({
  value,
  done: !value
}));

for await (const doc of cursor) {
  console.log(doc.name);
}

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const bcrypt = require('bcrypt');

const NUM_SALT_ROUNDS = 8;

test();

async function test() {
  const pws = ['password', 'password1', 'passw0rd'];

  // `promises` é uma array de Promises, porque `bcrypt.hash()`

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/**
 * Irá printar abaixo:
 * esperando... 250
 * resolvido com 250
 * esperando... 500
 * esperando... 1000
 */
test();

async function test() {

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class Form extends TraditionalObjectOrientedView {
  render() {
    // Informações passadas
    const { isSubmitted, buttonText } = this.attrs;
    if (!isSubmitted && !this.button) {
      // Form não foi enviado ainda
      this.button = new Button({
        children: buttonText,
        color: 'blue'
      });

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import renderer from 'react-test-renderer'
import Sidebar from '../Sidebar'

jest.mock('react-router-dom/Link', () => 'Link')

it('should render correctly', () => {
  const component = renderer.create(<Sidebar />)
  expect(component.toJSON()).toMatchSnapshot()
})

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import renderer from 'react-test-renderer'
import Sidebar from '../Sidebar'

jest.mock('react-router-dom', () => ({ Link: 'Link' }))

it('should render correctly', () => {
  const component = renderer.create(<Sidebar />)
  expect(component.toJSON()).toMatchSnapshot()
})

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import renderer from 'react-test-renderer'
import Select from '../Select'

jest.mock('react-select', () => {
  const { createElement } = require('react')
  // Perceba que como estamos mockando 'react-select'
  // nós precisamos usar require.requireActual, dentro do nosso mock
  // A melhor analogia aqui é o filme Inception, naquela parte do
  // sonho dentro do sonho, espero que você tenha assistido! :P
  const ReactSelect = require.requireActual('react-select')

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import renderer from 'react-test-renderer'
import Header from '../Header'
import store from '../store'

jest.mock('react-redux-loading-bar', () => {
  const ReactReduxLoadingBar = require.requireActual('react-redux-loading-bar')

  return {
    // Operação "spread" do módulo original
    ...ReactReduxLoadingBar,

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import renderer from 'react-test-renderer'
import Sidebar from '../Sidebar'

jest.mock('react-router-dom', () => ({
  Link: 'Link',
  Route: ({ children, path }) => children({ match: path === '/somewhere' })
}))

it('should render correctly', () => {
  const component = renderer.create(<Sidebar />)