Going beyond unit tests - WordCamp London 2015

COMPANY NAME PRESENTATION TITLE 12 - 12 - 2012
TimNash.co.uk @tnash
Because we all love to test right?
Going beyond
unit tests…

Once upon a
time…

MEWebsite Twitter

Most people
don’t write tests

Testing should
be fun?Otherwise we won’t test our side projects

Unit tests scare
folks…

So let’s not talk
about them…

This is not a talk
about BDD,
DDD, ATDD or
TDD Though you should check them out

Tools, Concepts
not methodology

So what’s Testing
then?

Dear client…
To Test:
Go to /form/
Enter Form Details
Click Submit & the form should submit
!
Any problems let me know!

Dear Developer…
It doesn’t work!

Dear client…
Did you try to clear your cache?

So what’s Testing
then really?

Codeception BDD
style testing
framework

Unit Testing, Mocking,
Functional, Acceptance
Testing, Regression
Testing and other stuff

Acceptance
Testing

Acceptance Testing
Codebase independent
Tests what client expects
Breaks things like a client
Easy to read and write
Can start straight away
Slow to run
Needs “live” end points
Infrastructure dependent

<?php
$I = new AcceptanceTester($scenario);
$I->wantTo('Fill in a form');
$I->amOnPage('/form/');
$I->see('This is a form');
$I->fillField('event', 'WordCamp London');
$I->fillField('date', '22 March 2015');
$I->fillField('where', 'London Metropolitan University');
$I->click('Save');
$I->see('Form Submitted');

Dear client…
To Test login into the WordPress Dashboard:
Go to /wp-login.php
Enter your username and your password
Click Login & you should be redirected  
to the dashboard
!

<?php
$I->wantTo('Login to WordPress Admin');
$I->amOnPage('/wp-login.php');
$I->fillField('Username', 'admin');
$I->fillField('Password','password');
$I->click('Log In');
$I->see('Dashboard');

Trying to Login to WordPress Admin (LoginCept)
Scenario:
* I am on page "/wp-login.php"
* I fill field "Username","admin"
* I fill field "Password","password"
* I click "Log In"
* I see "Dashboard"
* I click "Posts"
PASSED
php codecept.phar run acceptance --steps

Reporting in
console, html, xml

WebDriver,
Selenium,
PhatomJS

Webdriver
Pretty fast
Headless
CURL based solution
Doesn’t support javascript
User agent not always recognised
Often caught in WAFs
Enabled by default

Selenium
Browser Automation
Supports Firefox and Chrome
Used in multiple frameworks
Can operate headless with virtual frame buffer
Bit of a pig to set up
Codeception support a Docker container to ease setup

PhantomJS
Headless
Supports Javascript
User agent not always recognised
Often caught in WAFs

Functional
Testing

Functional Testing
Like Acceptance Testing
Push data into end point
Directly call AJAX end points
No browser emulation so simple web driver
Unlike unit testing not done in isolation

Test REST like
APIs… 
WP-API Endpoints

<?php
$I = new ApiTester($scenario);
$I->wantTo(‘Return all posts’);
$I->sendGet(‘posts’);
$I->seeResponseCodeIs(200);
$I->seeResponseIsJson();
$I->seeResponseContains(“content”);

Test REST like
APIs… 
RSS, ATOM Feeds

<?php
$I->wantTo(‘Return full Feed’);
$I->sendGet(‘feed’);
$I->seeResponseIsXml();
$I->seeResponseContains(“channel”);

Test cli… 
WP-CLI
Commands

<?php
$I = new CliTester($scenario);
$I->runShellCommand(‘wp example');
$I->seeInShellOutput(‘Example List');

Test Email… 
wp_mail();

MailCatcher + APITester
<?php
$I->wantTo(‘Return all emails’);
$I->sendGet(‘messages’);
$I->seeResponseIsJson();

Test XML-RPC… 
Really???Well yes you can!

<?php
$I->wantTo(‘Return XML-RPC ’);
$I->sendXMLRPCMethodCall(‘posts’);
$I->seeResponseIsXMLRPC();
$I->seeResponseContains(“posts”);

DBs, Factories
and tearing down

WP-Browserhttps://github.com/lucatume/wp-browser

<?php
$I->wantTo('create and check for a user');
// create a subscriber user with user login and id
$I->haveUserInDatabase('rincewind', 100);
// check for created user
$I->seeUserInDatabase(array('user_login' => 'rincewind', 'ID' => 100));

WP-CLI is your
friend

Wait this is all
PHP…

Class based Test
Suites :)

<?php
class exampleCEST
{
/**
* @before addPost
* @after checkFrontpage
*/
public function checkLogin(AcceptanceTester $I)
{
…
}
}

PageObjects &
StepObjects

<?php
class loginPage
{
public static $URL = ‘/wp-login.php’;
public static $usernameField = "Username";
public static $passwordField = "Password";
public static $submitButton = “Login in";
}

<?php
$I->wantTo('Login to WordPress Admin');
$I->amOnPage(loginPage::URL);
$I->fillField(loginPage::usernameField, 'admin');
$I->fillField(loginPage::passwordField,'password');
$I->click(loginPage::submitButton);
$I->see('Dashboard');

Helpers, modules
& Addons

<?php
namespace CodeceptionModule;
use CodeceptionModule;
class MailCatcher extends Module
{
protected $mailcatcher;
protected $config = array('url', 'port');
!
public function _initialize()
{
$url = trim($this->config['url'], '/') . ':' . $this->config['port'];
$this->mailcatcher = new GuzzleHttpClient($url);
}
}
....
....
/**
* Messages
*
* Get an array of all the message objects
*
* @return array
* @author Jordan Eldredge <jordaneldredge@gmail.com>
**/
protected function messages()
{
$response = $this->mailcatcher->get('/messages')->send();
$messages = $response->json();
usort($messages, array($this, 'messageSortCompare'));
return $messages;
MailCatcher Module

Debuging

codeception run --debug
!
$u = $foobard->haveUserInDatabase('rincewind', 100);
$this->debugSection(‘User Creation', $u);

Alternatives?

Multiple Test solutions out
there
PHPUnit + Selenium
Behat & Mink
Mocha
Fitness
!
many many more…

Testing is not
just for
development

Automated
Testing of
Backups

So about those
unit tests…

My Stuff aka Plugs:
My Site: timnash.co.uk
My Patreon Page: patreon.com/tnash

Going beyond unit tests - WordCamp London 2015

Recommended

Recommended

More Related Content

Similar to Going beyond unit tests - WordCamp London 2015

Similar to Going beyond unit tests - WordCamp London 2015 (20)

Recently uploaded

Recently uploaded (20)

Going beyond unit tests - WordCamp London 2015