Behaviour-Driven Development: Feature this!

Talk given at ArrrrCamp 2014

Transcript

1. BDD: Feature this! Fred Heath https://github.com/RedFred7 blog.bootstrap.me.uk
2. What this is about • Quick BDD Intro • How to get started: Actor discovery • Writing Features: do it right
3. The old way DEV TEST USER INTEGRATION PRODUCT OWNER
4. Getting the toast just right
5. From Features to Code Code Features Step Definitions P R O D U C T O W N E R U S E R T E S T I N G D E V E L O P M E N T
6. Tips & Tricks Everyone works together (no role barriers)
7. Why BDD? Everyone talks the same language Expectations are fully understood Living documentation Measurable progress Considerable bug reduction
8. ArrrrCamp.com ArrrrCamp
9. Actors “An Actor is an external entity that has a vested interest or stake in the system and the power to safe-guard this interest by dictating system behaviour.”
10. ArrrrCamp.com ArrrrCamp USER ADMINISTRATOR ORGANISER External API
11. Tips & Tricks Define your system and your actors
12. ArrrrCamp.com ArrrrCamp USER ADMINISTRATOR ORGANISER External API DELEGATE SPEAKER SALES MARKETING
13. Tips & Tricks 3. Specialise your Actors Specialise your Actors
14. Feature Discovery actors.each do |actor| features << actor.wants_from @system features << @system.wants_from actor end puts features
15. Feature Discovery As a [Specialised Actor] I want [specific System Behavior] So that I can [have a tangible benefit] Feature: Conference talk viewer As a Delegate I want to see a summary of all the talks So that I can see if I like any
16. Feature Discovery As an [Specialised Actor] I want [some System Behavior] So that I can [have a tangible benefit] Feature: View conference talks As a Delegate I want to see a summary of all the talks So that I can see if I like any decide whether to attend the conference
17. Feature Discovery Feature: Menu item highlighting Scenario Outline: Menu shows current page Given I go to <any_page> Then the side menu should highlight the page I'm currently on Examples: | any_page | | Home | | About | | Products |
18. Feature Discovery Feature: Navigation Link consistency As the Design Director I want to the site to be navigated in the same way as the other company sites So that the company can maintain a consistent corporate image Scenario Outline: Menu shows current page …....
19. Tips & Tricks Every Feature must tell a valid story
20. Feature scenarios Feature: ticket booking As an Attendee I want to book a ticket So that I can attend the conference
21. Feature scenarios Scenario: Successful booking Given I am on the "Book a ticket" screen When I enter "joe@domain.com" in "email" field And I enter "Joe" in "first_name" field And I enter "Bloggs" in "last_name" field And I click the "Book Now" button Then the message "ticket is reserved" appears
22. Feature scenarios Scenario: Successful booking Given I enter valid credentials Then I can book a ticket
23. Tips & Tricks Features describe what not how
24. Ambiguous vocabulary Scenario: New card request Given my account is valid And the session hasn't expired Then I have the option to request a new card
25. Ambiguous vocabulary Scenario: New card request Given my account is valid And the session hasn't expired Then I have the option to request a new card
26. Tips & Tricks Use clear, unambiguous terminology (glossary)
27. Summary • Quick BDD Intro • How to get started: Actor discovery • Writing Features: do it right
28. Tips & Tricks 1. Everyone works together (no role barriers) 2. Know your system and your Actors 3. Specialise your Actors 4. Every feature must tell a valid story 5. Features are about the 'what' not the 'how' 6. Use clear, unambiguous terms
29. Q & A • fred@bootstrap.me.uk • FredAtBootstrap