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WP Cypress

Contents

Why?

Cypress is designed to address the pain points of testing modern web applications. WP Cypress extends Cypress to address specific pain points developers and QA engineers face when testing WordPress applications.

We make it easier to:

  • Create a WordPress environment for testing
  • Seed the database with test data
  • Perform WordPress specific actions when writing tests

Requirements

  • Yarn
  • Node
  • Docker
  • Cypress

Installation

  1. Install cypress
yarn add cypress --dev
  1. Initialize Cypress
yarn run cypress open
  1. Install WP Cypress
yarn add @bigbite/wp-cypress --dev
  1. Import WP Cypress in /cypress/support/index.js
// ***********************************************************
// This example support/index.js is processed and
// loaded automatically before your test files.
//
// This is a great place to put global configuration and
// behavior that modifies Cypress.
//
// You can change the location of this file or turn off
// automatically serving support files with the
// 'supportFile' configuration option.
//
// You can read more here:
// https://on.cypress.io/configuration
// ***********************************************************

import '@bigbite/wp-cypress';
  1. Update /cypress.json with your environment variables.
{
  "baseUrl": "http://localhost",
  "pageLoadTimeout": 30000,
  "wp": {
    "version": "5.3.2",
    "plugins": [
      "./"
    ],
    "themes": []
  }
}

Getting Started

CLI

WP Cypress has been installed to your ./node_modules directory, with its binary executable accessible from ./node_modules/.bin.

The available commands are now available to run in your project root directory:

Name Description Example
start Starts a test environment yarn run wp-cypress start
stop Stops a running test environment yarn run wp-cypress stop
wp Execute the WordPress CLI in the running container yarn run wp-cypress wp "cli version"
resetDB Restore the database in the running container to it's initial state yarn run wp-cypress resetDB

Stuck? Try running yarn run wp-cypress --help

Env

To start the test environment run yarn run wp-cypress start in your project root directory.

This may take a while as it builds and starts a new docker container. However, you only need to run this once. This commands also acts as a restart, firstly removing any containers and volumes before starting the docker container.

Having trouble? Use File sharing to allow local directories on the Mac to be shared with Linux containers. See more https://docs.docker.com/docker-for-mac/#file-sharing

Once it is running there is no need to re-start it every time you run cypress. WP Cypress will restore the database to its initial state between each suite of integration tests to ensure a clean slate between tests.

You can add environment variables to the cypress.json configuration file. You can use this to specify the version of WordPress and which plugins/themes to install. All plugins will be activated and the first theme in the list will be activated. If this file is changed, you will need to re-run wp-cypress start to see the changes take effect. Composer is recommended to manage plugins and themes to if they do not exist in your project directory.

cypress.json
{
  "baseUrl": "http://localhost",
  "pageLoadTimeout": 30000,
  "wp": {
    "version": "5.4", 
    "plugins": [ 
      "./"
      "./absolute/path/to/plugin"
    ],
    "themes": [
      "../themes/absolute/path/to/theme"
    ]
  }
}

An additional plugin will be installed that contains some of the logic that drives the functionality in this package.

Seeds

In the cypress directory there a directory specfic to wp-cypress named seeds. Here lives our seeds, which we can use to populate the database with data. By default there will already be one Seed: Init. As it's name suggests, this will be ran when the container is initialised and therefore is a good place to create most data. Using the resetDB command will reset the database and run the Init seed again.

Seeds executed in the running container allowing you to perform any required logic you need to set up your environment. Alongside this there are some helpful tools to help generate dummy data.

If you wish to add more seeds, any file in the seeds directory is autoloaded to be executed at a later date using wp seed ClassName in the running container or alternatively using the seed command cy.seedDB('ClassName').

Example

/wp-cypress/seeds/MySeeder.php
<?php

use \WP_Cypress\Seeder\Seeder;

class MySeeder extends Seeder {
	public function run() {
		$title = $this->faker->sentence();
		$this->generate->posts( [
			'post_title' => $title,
			'import_id'  => 10,
		], 1 );
	}
}

The file's name must match the name of the class.

Cypress

Now you can begin writing tests! To learn more about writing tests with cypress visit their documentation on how to Write Your First Test. This package extends cypress with some additional commands that may be useful, please refer to the API below.

API

Commands

General

Command Description Example
wp(command) Execute the WP CLI in the running container cy.wp('cli version')
seedDB(seed) Run a seeder cy.seedDB('SeedName')
resetDB() Restore the database to it's initial state cy.resetDB()
installTheme(name) Install a theme cy.installTheme('my-theme')
activateTheme(name) Activate a theme cy.activateTheme('my-theme')
installPlugin(name) Install a plugin cy.installPlugin('my-plugin')
activatePlugin(name) Active a plugin cy.activatePlugin('my-plugin')
deactivatePlugin(name) Deactivate a plugin cy.deactivatePlugin('my-plugin')
visitAdmin() Visit the WordPress admin panel cy.visitAdmin()

DOM

Command Description Example
setSelection(text) If a text input is active, set the selection. cy.get('.element').click().setSelection('selection')

Post

Command Description Example
editPost(id) Visit the a post's edit page cy.editPost(1)
saveCurrentPost() If on a post's edit page, save the psot cy.saveCurrentPost()

Seeder

Namespace

\WP_Cypress\Seeder

abstract class Seeder implements SeederInterface

Traits

Trait Description
Date Shared helper methods for dates

Properties

Property Description
protected $generate Reference to a Generator instance
protected $faker Reference to a Faker\Generator instance, see Faker docs

Methods

Method Description Return From
now() Get the current date in Y-m-d H:i:s format string Date

interface SeederInterface

Methods

Method Description Return
run() Executes when seeded void

trait Date

Methods

Method Description Return
now() Get the current date in Y-m-d H:i:s format string

class Generator

Methods

Method Description Return
posts( array $properties, number $count ) Generate posts with dummy data void