Hello!

my name is @matason


Testing

To prove something works as we expect
To know if we've broken something when we make changes
To provide an audit trail of intent
To shorten the feedback cycle
To write better code
To know when we're done

Kent Beck

Test Driven Development

http://blip.tv/railsconf/kent-beck-three-rivers-institute-tri-saturday-keynote-1170018

Dan North

Behaviour Driven Development


"we are not testing that an application functions as we (developers) expect,

but instead

we're testing that it fulfils client business needs"


Konstantin Kudryashov (creator of Behat)

Ingredients

Drupal 7
Composer
Behat
Mink
Goutte
Selenium Server
Drupal Extension
Gherkin

Drupal 7

Drupal is an open source content management platform
http://drupal.org

Composer

Composer is a tool for dependency management in PHP

Behat

A PHP framework for testing your business expectations

Mink

Provides a consistent API for different browser drivers/libraries

Goutte

Goutte is a screen scraping and web crawling library for PHP

Selenium Server

Browser driver

Drupal Extension

Integration layer between Behat, Mink Extension, and Drupal

Gherkin

A structured language for describing software behaviour

Let's bake!

Get Selenium Server



Start Selenium

$ java -jar selenium-server-standalone-2.33.0.jar

Create a tests directory

$ mkdir tests
$ cd tests

tests/composer.json

{
  "require": {
    "behat/behat": "2.4.*@stable",
    "behat/mink": "1.4.*@stable",
    "behat/mink-extension": "*",
    "behat/mink-goutte-driver": "*",
    "behat/mink-selenium2-driver": "*",
    "drupal/drupal-extension": "*"
  },
  "minimum-stability": "dev",
  "config": {
    "bin-dir": "bin/"
  }
}

Install Composer

$ curl -sS https://getcomposer.org/installer | php

Using Composer

$ php composer.phar install


Initialise Behat

$ ./bin/behat --init

which should respond with

+d features - place your *.feature files here
+d features/bootstrap - place bootstrap scripts and static files here
+f features/bootstrap/FeatureContext.php - place your feature related code here

tests/behat.yml

default:
  paths:
    features: 'features'
  extensions:
    Behat\MinkExtension\Extension:
      goutte: ~
      selenium2: ~
      base_url: http://drupal7.vm/
    Drupal\DrupalExtension\Extension:
      blackbox: ~

Note: base_url needs to match your environment!


Introducing FeatureContext.php

tests/features/bootstrap/FeatureContext.php
use Drupal\DrupalExtension\Context\DrupalContext;
class FeatureContext extends DrupalContext

Your first test

tests/features/homepage.feature
Feature: description
  As a role
  I want feature
  So that benefit

  Scenario: description
    Given context
    When event
    Then outcome 

Your first test

tests/features/homepage.feature
Feature: Homepage
  As a site visitor
  I want see the welcome message
  So that I know I am on the right site

  Scenario: Visitor visits the homepage and observes the welcome message
    Given I am on "/"
    Then I should see "Welcome to localhost" 

Your first test

tests/features/homepage.feature
Feature: Homepage
  As a site visitor
  I want see the welcome message
  So that I know I am on the right site

  @javascript
  Scenario: Visitor visits the homepage and observes the welcome message
    Given I am on "/"
    Then I should see "Welcome to localhost" 

@javascript causes the test to launch and run in a browser

Code

Questions?

Resources

Behat/Drupal - NWDUG - June 2013

By matason

Behat/Drupal - NWDUG - June 2013

A talk about Behaviour Driven Development - what it is and why it's useful. Also covers Behat - the PHP framework that makes BDD possible in projects such as Drupal.

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