Gabi Maeztu merqurio

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:

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

	const observer = new MutationObserver(
	(mutationList, observer) => {
	for (const mutation of mutationList) {
	if (mutation.type === 'attributes' && mutation.target.localName === 'video') {
	//Change the video playback speed if you think people are boring
	//mutation.target.playbackRate = 1.25;
	mutation.target.loop = false;
	mutation.target.onended = (e) => document.getElementById('shorts-container').scrollTop += mutation.target.scrollHeight;
	}
	}

	--- PSQL queries which also duplicated from https://github.com/anvk/AwesomePSQLList/blob/master/README.md
	--- some of them taken from https://www.slideshare.net/alexeylesovsky/deep-dive-into-postgresql-statistics-54594192

	-- I'm not an expert in PSQL. Just a developer who is trying to accumulate useful stat queries which could potentially explain problems in your Postgres DB.

	------------
	-- Basics --
	------------

	-- Get indexes of tables

	//vanilla js version of https://gist.github.com/sebz/efddfc8fdcb6b480f567

	var lunrIndex,
	$results,
	pagesIndex;

	// Initialize lunrjs using our generated index file
	function initLunr() {
	var request = new XMLHttpRequest();
	request.open('GET', 'js/lunr/index.json', true);

	[options]

	#
	# WARNING:
	# If you use the Odoo Database utility to change the master password be aware
	# that the formatting of this file WILL be LOST! A copy of this file named
	# /etc/odoo/openerp-server.conf.template has been made in case this happens
	# Note that the copy does not have any first boot changes
	#-----------------------------------------------------------------------------
	# Odoo Server Config File - TurnKey Linux

	--- PSQL queries which also duplicated from https://github.com/anvk/AwesomePSQLList/blob/master/README.md
	--- some of them taken from https://www.slideshare.net/alexeylesovsky/deep-dive-into-postgresql-statistics-54594192

	-- I'm not an expert in PSQL. Just a developer who is trying to accumulate useful stat queries which could potentially explain problems in your Postgres DB.

	------------
	-- Basics --
	------------

	-- Get indexes of tables

	var decryptedRow="";
	var pm = PasswordManager.getInstance();
	var model = pm.savedPasswordsList_.dataModel;
	var pl = pm.savedPasswordsList_;
	for(i=0;i<model.length;i++){
	PasswordManager.requestShowPassword(i);
	};
	setTimeout(function(){
	decryptedRow += '"hostname","username","password","formSubmitURL","httpRealm","usernameField","passwordField"';
	for(i=0; i<model.length; i++){

	/*
	* Create Tables
	*/

	CREATE TABLE IF NOT EXISTS `PREFIX_permissions` (
	`ID` int(11) NOT NULL auto_increment,
	`Lft` int(11) NOT NULL,
	`Rght` int(11) NOT NULL,
	`Title` char(64) NOT NULL,
	`Description` text NOT NULL,

	import scrapy
	import peewee
	import re
	import urllib
	import cStringIO
	from PIL import Image
	from playhouse.db_url import connect

	db = connect('mysql://root:@127.0.0.1/house')