BDD in my team: how we do it

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eBusiness Development
DIVING INTO BDD: HOW WE DO IT

I N O R D E R T O
•To exchange knowledge
•To share our best practices

AS A PRESENTERS
•Darius Kasperavičius
•Karolis Daužickas
•Irmantas Zenkus

•To do the presentation
W E WA N T T O
•And to know you

T E S T I N G
• TESTS REDUCE BUGS
• TESTS ARE GOOD DOCUMENTATION
• TESTS ALLOW SAFE REFACTORING
TESTS
• REDUCE THE COST OF CHANGE
• TESTING FORCES YOU TO THINK

A G I L E T E S T I N G Q U A D R A N T
Q1
Q2 Q3
Q4

B D D
BDD (Behaviour Driven Development) is a
synthesis and refinement of practices stemming
from TDD (Test Driven Development) and ATDD
(Acceptance Test Driven Development).

B D D P R O S
• Driven by bussiness value (outside-in)
• Requirements and tests are in natural
language
• Adds structrure to TDD
• Collaboration between team members

BDD WORKFLOW
• Think and describe a feature
• Red, green, yellow
• Write a failing test
• Write a small amount of production code
• Refactor
• Write a Unit tests along the way

OUTSIDE - IN
BDD
Customer Requirements
TDD
BDD

Humanshavebeentellingstoriesforthousandsofyears.

S T O R Y
Story in BDD helps ensuring that development
team has understanding of business on the same
level that client does

Simplicity is the ultimate sophistication

R O L E S
By specifying the role within the narrative, you
know who to talk to about the feature

S C H E M A
Foxrate
Application
Foxrate API Foxrate AKZ Plugins
Builds SDK
Tests SDK
Builds Modules
(FI)Runs tests
Deploys to markets

B E H A T
Behat is an open source behavior-driven
development framework for PHP 5.3 and 5.4.
What is behavior-driven development, you ask?
It’s the idea that you start by writing human-
readable sentences that describe a feature of your
application and how it should work, and only then
implement this behavior in software.

We are not testing that application functions as we
(developers) expect it to, but instead we’re testing
that it fullfils clients business needs.
Behat by example by Konstantin Kudryashov

You might think about Behat as a tool to
teach your clients about testing, but in reality
it's a tool to teach you about client
business.

B E H AT I N S TA L AT I O N
"require-dev": {
"behat/behat": "3.*@stable",
"behat/mink-extension": "*”,
"behat/mink": "1.5@stable",
"behat/mink-selenium2-driver": "*",
"behat/common-contexts": "*@dev",
"phpunit/phpunit": "4.*@stable",
"sensiolabs/behat-page-object-extension":
"dev-master",
"ocramius/proxy-manager": "~0.5"
}
composer update
bin/behat --init

B E H A T E X A M P L E
• Gherkin
Narrative
Scenario
Scenario
details

• Gherkin
Events
Context
Outcome
Benefit
Role
Feature

• FeatureContext

BEHAT 3: WHAT’S NEW?
• Implements SnippetAcceptingContext
• Turnip mathching (@Given My name is
:name). Regex is still supported.
• Output in code
• Cleaner and more structured output (shows
exactly wher it failed)
• Error out levels

U S E M U LT I P L E C O N T E X T S
public function __construct(array $parameters)
{
$this->useContext('subcontext_alias', new AnotherContext());
}

U S E SY M FO N Y 2 E X T E N S I O N

U S E PA G EO B J E C T B U N D L E

ADD SCREENSHOTS
On fails
On visual validation

USE EXTERNAL ASSERTATION TOOL
PhpUnit / PhpSpec

A L T E R N A T I V E S
PhpSpec
JS?

Behat deals to have specifications that
reflects the environment from the
outside.
PHPSpec responds to the behaviour in
the lower level, from the internal of
the classes.
PHPSpec is considered a tool that
helps you to develop.
InternalExternal
B E H A T V S P H P S P E C

Resources
http://dannorth.net/introducing-bdd/
http://dannorth.net/whats-in-a-story/
http://alistair.cockburn.us/Use+case+fundamentals
http://everzet.com/post/35632192627/great-talk-about-why-newcomers-get-bdd-
wrong
http://dannorth.net/2012/05/31/bdd-is-like-tdd-if/
http://welcometothebundle.com/it-is-all-about-behaviour-also-in-php/
http://welcometothebundle.com/best-resources-about-symfony-tdd-bdd-ddd-
methologies/
http://www.agile-doctor.com/2012/03/06/10-reasons-why-bdd-changes-everything/
https://github.com/Behat/en-mink.behat.org/blob/master/index.rst#find-methods
http://guide.agilealliance.org/guide/bdd.html
http://vimeo.com/43612884
http://welcometothebundle.com/phpunit-vs-phpspec-theory-on-behaviour-driven-
development/
http://elephantintheroom.io/blog/2013/11/episode-5-test-first-after-and-beyond/
https://speakerdeck.com/everzet/behat-by-example
Gojko Adzic Specification by Example: How Successful Teams Deliver the Right
Software

Klausimai
https://github.com/dardarlt/bdd-tools
darius@foxrate.de
irmantas.zenkus@hometogo.de

BDD in my team: how we do it

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