emilong

// render the given branch, which is specified by its startingPoint, length, and angle
// If there are more branches to grow, grow randomly to the left and right
function growBranch({ startingPoint, length, angle, remainingBranches }) {
  endingPoint = computeEndpoint({ startingPoint, length, angle });
  renderBranch({ startingPoint, endingPoint });

  const newRemainingBranches = remainingBranches - 1;
  if (newRemainingBranches <= 0) {
    // Return the endingPoint immediately: we know the end of this branch.
    // We return this as a promise that can be resolved immediately so

emilong

// render the given branch, which is specified by its startingPoint, length, and angle
// If there are more branches to grow, grow randomly to the left and right
function growBranch({ startingPoint, length, angle, remainingBranches }) {
  endingPoint = computeEndpoint({ startingPoint, length, angle });
  renderBranch({ startingPoint, endingPoint });

  const newRemainingBranches = remainingBranches - 1;
  if (newRemainingBranches <= 0) {
    return;
  }

emilong

// Link.react-test.js
import React from 'react';
import Link from '../Link.react';
import renderer from 'react-test-renderer';

test('Link changes the class when hovered', () => {
  const component = renderer.create(
    <Link page="http://www.facebook.com">Facebook</Link>
  );
  let tree = component.toJSON();

emilong

const colors = require('colors/safe');
const path = require('path');
const fs = require('fs');

function captureLogs(filename) {
  const output = path.join(BROWSER_LOGS_DIR, filename);
  console.log(colors.red.bold('📜 capturing logs to'), output);
  return browser.manage().logs().get('browser').then(browserLog => {
    fs.writeFileSync(output, JSON.stringify(browserLog));
  });

emilong

const sanitize = require('sanitize-filename');

// Declared outside any describe() or context() block so that it's called after every test.

// this is bound by Mocha to let us have access to the current test state, so we make sure
// to avoid a fat-arrow function declaration here.
afterEach(function(){
  const filename = `${sanitize(this.currentTest.title.replace(/\s+/g, '-'))}-${+new Date()}`;

  if (this.currentTest.state === 'failed') {

emilong

#!/bin/bash

set -ex

google-chrome --version
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
sudo apt-get update
sudo apt-get --only-upgrade install google-chrome-stable
google-chrome --version

emilong

#!/bin/bash

echo "Waiting for servers to start..."
while true; do
  curl -f http://localhost:8000/health > /dev/null 2> /dev/null
  if [ $? = 0 ]; then
    echo "Frontend started"

    curl -f http://localhost:3000/health > /dev/null 2> /dev/null
    if [ $? = 0 ]; then

emilong

dependencies:
  cache_directories:
    - client-cache
    - service-cache
  post:
    - bash scripts/get-latest-chrome.sh

    - bash scripts/run-client.sh:
        background: true

emilong

const original = [0,1,2,3];
const copy = Object.assign([], original, { 2: 42 }); // [0,1,42,3]

console.log(original);
// [ 0, 1, 2, 3 ]

console.log(copy);
// [ 0, 1, 42, 3 ]

emilong

function WhySoManyProps(props) {
  const user = extractUser(props);
  const fudge = calculateFudge();
  const bits = computeBits();
  
  // This is soooooo redundant.
  return <SomeComponent user={user} fudge={fudge} bits={bits} />;
}

function Shorthand(props) {