BDD & Rspec

Behaviour Driven Development withRSpec

Aslak HellesøyCTOblog.aslakhellesoy.com

David Chelimsky Aslak Hellesøy 16000 downloads Ranked 31 at RubyForge 40 contributors 2000 svn commits 890.000 Google hits 100% coverage 100% self describing 833 examples

GSoC

JRuby << RSpec

Background

TDD

Problem

Developers don’t know...

• where to start

• what to test

• what not to test

• how much to test in one go

• what to call tests

• how to fix a broken test

• that TDD is about design

Test?

Assert??

Sapir-Whorf

BDD

BDD helps you realise

• where to start

• what to test

• what not to test

• how much to test in one go

• what to call tests

• how to fix a broken test

• that TDD is about design

• outside-in

• user stories

• anything else

• as little as possible

• intent

• documentation

• RSpec

BehaviourThe actions or reactions of an object or organism, usually in relation to the environment.

Anything that an organism does involving action and response to stimulation.

Anything a computer system does in response to messages.

As a bowler

I want to have my score calculated

So that I don’t have to do it myself

Design

Documentation

Tests

http://rspec.rubyforge.org/