Behavior Driven Development (BDD) is a software development technique where you write human-readable stories that describe desired application behavior. Behat is a tool that supports BDD by allowing you to write acceptance tests in a natural language format. When using Behat with Drupal, you configure Composer, write feature files using the Gherkin syntax with scenarios containing steps, and run tests by starting Selenium and executing the scenarios, optionally filtering with tags.

1. Behavior Driven Development.
Testing Drupal using Behat
Andrei Jechiu
andrei.jechiu@gmail.com
http://wearepropeople.com/

2. What is BDD
Behavior Driven Development (BDD) - software
development process based on Test Driven Development
(TDD)
With BDD, you write human-readable stories that describe
the behavior of your application
BDD is an agile software development technique
It encourages collaboration between developers, QA and
non-technical or business participants in a software project

3. Test Driven Development

4. Behat
A tool that makes behavior driven development
(BDD) possible
Uses Mink as an acceptance test framework
Adds confidence to the tests by making sure
they fail as no code has been developed

5. Behat and Drupal
composer.json

6. Behat and Drupal
After composer.json configuration:
Download composer.phar and run install command:

7. Behat and Drupal
behat.yml

8. Behat and Drupal
Check that extension is properly loaded:

9. Features
Every *.feature file conventionally consists of a single feature
Feature files are written using the Gherkin syntax
You can use tags to group features and scenarios together

10. Scenarios
Every scenario consists of a list of steps, which must start
with one of the keywords Given, When, Then, But or And
(or localized one).

11. Run tests
Run Selenium server
Run test
Use tags
To run some scenarios from the same feature or different features use tags

12. Example
cart.feature

13. Example
FeatureContext.php

14. Resources
http://docs.behat.org
http://drupal.org/project/drupalextension
http://drupalwatchdog.com/2/2/behat-mink
http://www.slideshare.net/jmikola1/pratical-bdd-with-behat-
and-mink
http://en.wikipedia.org/wiki/Test-driven_development