vzaidman

yield Nightmare()
  .goto('http://yahoo.com')
  .type('input[title="Search"]', 'github nightmare')
  .click('.searchsubmit')
 

vzaidman

import test from 'ava'

test('arrays are equal', t => {
  t.deepEqual([1, 2], [1, 2])
})
 

vzaidman

import React, {Component} from 'react'

class ChildComponent extends Component {

  componentDidMount() {
    console.log('ChildComponent Component Did Mount')
  }

  componentWillUnmount() {
    console.log('ChildComponent Un-mount :*(')

vzaidman

expect(fn(5)).to.be(10)

vzaidman

const flyDroneButton = document.getElementById('fly-drone-button')

flyDroneButton.click()

assert(isDroneFlyingCommandSent())

//or even
drone.checkIfFlyingViaBluetooth()
  .then(isFlying => assert(isFlying))

vzaidman

Go to page "https://localhost:3303"

Type "test-user" in the field "#username"

Type "test-pass" in the field "#password"

Click on "#login"

Expect Page Url to be https://localhost:3303/dashboard

vzaidman

# Install Karma:
npm install karma --save-dev

# Install plugins that your project needs:
npm install karma-jasmine jasmine-core karma-chrome-launcher karma-firefox-launcher --save-dev

# Run on 
npx karma start karma.conf.js --log-level debug --single-run

vzaidman

if (hookState.num !== newHookState.num){
  setHookState(newHookState)
}

vzaidman

function useNumState(defState){
  const [state, setState] = React.useState(defState)

  function smartSetState(newState){
    if(state.num !== newState.num){
      setState(newState)
    }
  }

  return [state, smartSetState]

vzaidman

function reducer(state, action){
  switch(action.type){

    case 'broken-set-count':
      return {count: action.payload.count}

    case 'set-count':
      if(action.payload.count === state.count){
        return state
      }