webpapaya

const required = () => {throw Error('Parameter missing')};
const myFn = (myArgument = required()) => {};

it('throws error when argument is not present', () => {
  assert.throws(() => {
    myFn();
  });  
});

webpapaya

message = %w(
  Lorem ipsum dolor sit amet, consetetur 
  sadipscing elitr, sed diam nonumy eirmod
  tempor invidunt ut labore et dolore magna
).join(' ')

webpapaya

import {
  assertThat,
  equalTo,
} from 'hamjest';
import { getDaysInMonth } from './day';

describe('getDaysInMonth()', () => {
  it('April has 30 days', () =>
    assertThat(getDaysInMonth(4, 2016), equalTo(30)));

webpapaya

#!/bin/bash

if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_BRANCH" != "$CHANGELOG_BRANCH" ]; then
  echo "This commit was made against the $TRAVIS_BRANCH and not $CHANGELOG_BRANCH! Changelog not updated!"
  exit 0
fi

gem install rack -v 1.6.4
gem install github_changelog_generator

webpapaya

export const executeAndReturn = (fn) => {
  return (argument) => {
    fn();
    return argument;
  }
};

webpapaya

/^[+-]?\d+\b$|^[+-]?\d+\b-[+-]?\d{2}$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}[\sT][+-]?\d{2}$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}[\sT][+-]?\d{2}:[+-]?\d{2}$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}[\sT][+-]?\d{2}:[+-]?\d{2}:[+-]?\d{2}(\.\d+)?$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}[\sT][+-]?\d{2}:[+-]?\d{2}[+-]\d{2}(:\d{2})?|Z$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}[\sT][+-]?\d{2}[+-]\d{2}(:\d{2})?|Z$|^[+-]?\d+\b-[+-]?\d{2}-[+-]?\d{2}[\sT][+-]?\d{2}:[+-]?\d{2}:[+-]?\d{2}(\.\d+)?[+-]\d{2}(:\d{2})?|Z/

webpapaya

import React from 'react';
import ReactDOM from 'react-dom';

const createActions = () => {
  const signIn = () => new Promise((resolve) => {
    setTimeout(resolve, 1000)
  });
  
  return { signIn };
};

webpapaya

import React from 'react';
import ReactDOM from 'react-dom';
import { waitAtLeast } from 'promise-frites';

//...
class SignInScreen extends React.Component {
  state = {
    isLoading: false
  }
  render() {

webpapaya

import React from 'react';
import ReactDOM from 'react-dom';
import { waitAtLeast } from 'promise-frites';

//...
class SignInScreen extends React.Component {
  state = {
    isLoading: false,
    loadingText: "Please wait",
  }

webpapaya

const waitAtLeast1Second = waitAtLeast(1);
const apiCall = Promise.resolve('my api data');

Promise.resolve()
  .then(waitAtLeast1Second(apiCall))
  .then((data) => data === 'my api data');