ivawzh / asyncAwait.js

Last active January 30, 2016 06:24

async/await of ES7 101

	// Conclusion:
	// Each synchronous call blocks Node's event loop. All concurrent tasks are blocked, and the event loop sits idle, until the call completes.
	// Another important note, async/await runs at 79% of the speed of bare callbacks.

	// Full documentation: https://github.com/yortus/asyncawait

	import { describe, it } from 'mocha';
	import { expect } from 'chai';

	describe('async/await', ()=> {

ivawzh / promise-trigger.js

Last active April 26, 2016 14:20

when is a promise triggered?

	// Promise is triggered by `()`, not `.then()`

	describe('promise trigger', () => {
	it('flat promise is triggered by `()` even without .then', done => {
	let result = []
	result.push(1)
	function aFlatPromise(val) {
	return new Promise(resolve => {
	result.push(val)
	resolve(val)

ivawzh / generator function

Created May 9, 2016 10:13

basic generator function

	it('generator function works', () => {
	function* anotherGenerator(i) {
	yield i + 1
	yield i + 2
	yield i + 3
	}

	function* generator(i){
	yield i
	yield* anotherGenerator(i)

ivawzh / sinon-faker-server-ajax-delay-test.js

Created May 25, 2016 23:33

Neither sinon faker server respond nor ajax delays

	describe('neither sinon faker server respond nor ajax delays', () => {
	let server
	beforeEach('set up fake server', () => {
	server = sinon.fakeServer.create()
	server.respondWith("GET", 'hey/you', [200, { 'Content-Type': 'application/json' }, JSON.stringify({})])
	})
	afterEach(() => server.restore())

	context('when ajax is called', () => {
	let result

ivawzh / firebase-faker.js

Last active July 13, 2016 08:04

Firebase test helper as a set up util for npm lib 'firebase-server'.

	import proxyquire from 'proxyquire'
	import originalWebsocket from 'faye-websocket'
	import FirebaseServer from 'firebase-server'

	const localhostWS = {
	'faye-websocket': {
	'@global': true,
	Client: url => {
	const localhostUrl = url.replace(/dummy\d+\.firebaseio\.test/i, 'localhost')
	return new originalWebsocket.Client(localhostUrl)

ivawzh / firebase-faker.spec.js

Last active July 12, 2016 16:40

Spec for firebase-faker test helper

	import { expect } from 'chai'
	import { setupDatabase, destroyDatabase } from './firebase-faker'

	describe('Firebase fake server', () => {
	let server, data, client
	beforeEach(() => {
	const port = 45001
	data = {
	states: {
	CA: 'California',

ivawzh / redux-middleware-block-reducer.js

Last active August 8, 2016 14:27

Redux middleware blocks Saga actions' way to reducer

	describe.only('middleware 101', () => {
	let store, stateHistory, dispatched
	beforeEach(()=>{
	const defaultState = { text: 'initial state' }

	function reducer(state = defaultState, action) {
	switch (action.type) {
	case 'SIDE_EFFECT_USER_FETCH':
	return { text: 'THIS HAS FAILED TO BE ESCAPED!!!!'}
	case 'say':

ivawzh / redux-backend.js

Last active August 12, 2016 10:50

Immutable unidirectional back-end architechure

	// coordinator => saga => action => reducer => coordinator => ...

	describe.only('Unidirectional back-end architechure', () => {
	let store, stateHistory, dispatched
	beforeEach(()=>{
	const defaultState = { text: 'initial state' }

	function reducer(state = defaultState, action) {
	switch (action.type) {
	case 'UPDATE_NUMBER':

ivawzh / jest-test.jest.js

Last active October 13, 2016 06:11

Jest test 101

	// @ package.json
	{
	"scripts": {
	"jest": "NODE_ENV=test DB_USER=ivan-wang ./node_modules/jest/bin/jest.js",
	"jest-watch": "NODE_ENV=test DB_USER=ivan-wang ./node_modules/jest/bin/jest.js --watch --onlyChanged"
	},
	"jest": {
	"testEnvironment": "node",
	"automock": true,
	"rootDir": "",

ivawzh / babel-and-jest-setup.md

Last active October 25, 2016 07:47

Babel & Jest setup 2016/10/21

Babel setup with Jest test

@ package.json

"devDependencies": {
    "babel-cli": "^6.16.0",                        // for production build
    "babel-jest": "^16.0.0",                       // for Jest test with ES6
    "babel-plugin-transform-runtime": "^6.15.0",   // for Babel Register. Because babel only handle syntax translation, but not provide                                                    // missing APIs from old javascript like `Array.includes`.
                                                   // `Promise`, `Set`, `Map`, or instance methods like `String.repeat` or

Ivan Wang ivawzh

Babel setup with Jest test