Bernd Rennebeck brennebeck

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Idiomatic React Testing Patterns

Testing React components seems simple at first. Then you need to test something that isn't a pure interaction and things seem to break down. These 4 patterns should help you write readable, flexible tests for the type of component you are testing.

Setup

I recommend doing all setup in the most functional way possible. If you can avoid it, don't set variables in a beforeEach. This will help ensure tests are isolated and make things a bit easier to reason about. I use a pattern that gives great defaults for each test example but allows every example to override props when needed:

MySQL

Getting started:

Related tutorial: http://cd64.de/mysql-cli

SQL joins infografic: http://cd64.de/sql-joins

	#!/usr/bin/env ruby

	if ARGV.size != 2
	puts "Merges Fields from Plist-Files together into a new file"
	puts "USAGE: ./plistmerge.rb source-file input-file"
	exit
	end

	# The values for those fields will be migrated from the source to the target file
	FieldsToMigrate = %w(latitude longitude)

	#!/bin/sh

	# Alot of these configs have been taken from the various places
	# on the web, most from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Set the colours you can use
	black='\033[0;30m'
	white='\033[0;37m'
	red='\033[0;31m'


	####
	#### pyenv-virtualenv bash prompt customization
	####


	# pyenv
	eval "$(pyenv init -)"

	# pyenv-virtualenv:


	#
	# A CORS (Cross-Origin Resouce Sharing) config for nginx
	#
	# == Purpose
	#
	# This nginx configuration enables CORS requests in the following way:
	# - enables CORS just for origins on a whitelist specified by a regular expression
	# - CORS preflight request (OPTIONS) are responded immediately
	# - Access-Control-Allow-Credentials=true for GET and POST requests

	#!/bin/env node
	// OpenShift sample Node application
	var express = require('express');
	var fs = require('fs');


	/**
	* Define the sample application.
	*/
	var SampleApp = function() {