The document discusses Cucumber, a tool for writing acceptance tests in a business-readable domain-specific language called Gherkin. It touches on how Cucumber supports over 28 languages by compiling Gherkin grammars into the target language. It also provides examples of tagging scenarios and features in Cucumber to enable focused testing. Finally, it recommends further reading resources for learning more about Cucumber.

1. Cucumber
collaboration language
discussion value
customers acceptance
Joseph Wilk

2. Why are you here?

3. Why are you here?
In order ...

4. Why are you here?
In order ...
As a Underground attendee

5. Why are you here?
In order ...
As a Underground attendee
I want ...

6. Why are you here?
In order ...
As a Underground attendee
I want ...
I’ll show you a
good time

7. What’s your acceptance
criteria?

8. Scenario: Ecstatic Underground attendees
Given people turned up
When Joseph talks
Then everyone should learn something new
And no-one should fall asleep
And no cucumbers should be thrown

9. Pass
Fail

10. Pass
Fail

11. How do you know
your finished?
You’ll know
when I’m
finished

12. Outside-in
User
Browser

13. Outside-in
User
Browser
Views

14. Outside-in
User
Browser
Views
Controllers
Models

15. “I believe that the hardest part of software projects, the
most common source of project failure, is
communication with the customers and users of
that software.
By providing a clear yet precise language to deal
with domains, a DSL can help improve this
communication.”
Martin Fowler

16. def given_ruby_provides_a_great_dsl(*arg)
developers.should be_happy
end
given_ruby_provides_a_great_dsl 'run away!'

17. def given_ruby_provides_a_great_dsl(*arg)
developers.should be_happy
end
given_ruby_provides_a_great_dsl 'run away!'
Developer

18. Why do I
quote things?
Why can
Underscores! I not use ‘ $
Customer

19. Customer Developer
Tester

20. Customer Developer
Tester

21. Customer Developer
Microsoft Word
Tester

22. Customer Developer
Cucumber
Tester

23. Customer Developer
Plaintext Ruby
Tester

24. For Cuke Sake Why?
• Token Conversation
• Acceptance Criteria
• Design
• Documentation
• Functional test
• Integration test

25. Cucumber Feature
Feature: Be awesome Not
Narrative executed
Example of
Scenario: title
behaviour
which rocks
Given <some context>
And <yet more context>
When <some action>
Steps
And <more actions>
Then <some outcome>
And <more outcomes>

26. Cucumber Feature
Feature: Be awesome Not
Narrative executed
Example of
Scenario: title
behaviour
which rocks
Given <some context>
And <yet more context>
When <some action>
Steps
And <more actions>
Then <some outcome>
And <more outcomes>

27. Plaintext
Ruby Plaintext
Plaintext
Ruby
Ruby

28. Plaintext
Step Given a foaming cuke
Ruby Plaintext
Plaintext
Ruby
Ruby

29. Plaintext
Step Given a foaming cuke
Ruby Plaintext
Plaintext
Given /^a foaming (.*)$/i do |fruit|
Step fruit.should == 'cukes'
#assert_equal(fruit, 'cukes')
definition end
Ruby
Ruby

30. Plaintext
Step Given a foaming cuke
regexp match
Ruby Plaintext
Plaintext
Given /^a foaming (.*)$/i do |fruit|
Step fruit.should == 'cukes'
#assert_equal(fruit, 'cukes')
definition end
Ruby
Ruby

31. Cucumber provides the
venue
Sinatra
Rails
Cuke4Duke

32. Cucumber Gateway?
World
domination?
Cucumber
Java Virtual Machine
Clojure

33. Cucumber English

34. Cucumber English

35. огурец Russian
concombre French
Japanese
Okurkový Czech
Gurke German
Cucumber English
pepino Spanish
cetriolo Italian
agurk Danish
‫ﺍﳋﻴﺎﺭ‬ Arabic
ketimun Indonesian
‫מְלָפְפֹון‬ Hebrew
Cogombre Catalan
CUCUMBR LOLCats
Agurk Norwegian

36. огурец Russian Korean
concombre French
gurka Swedish
Japanese
castravete Romanian
Okurkový Czech
ogórek Polish
Gurke German
Cucumber English Kurk Estonian
pepino Spanish dưa chuột Vietnamese
cetriolo Italian uhorka Slovak
agurk Danish gurķis Latvian
‫ﺍﳋﻴﺎﺭ‬ Arabic Agurkas Lithuanian
ketimun Indonesian Salátauborka Hungarian
‫מְלָפְפֹון‬ Hebrew
Kurkku Finnish
Cogombre Catalan
Краставица Bulgarian
CUCUMBR LOLCats
Agurk Norwegian Pepino Portuguese

37. # language: en-au
Crikey: Eating
Mate: cucumbers
Ya now how I have 3 cucumbers
When I eat 2 cucumbers
Ya gotta have 2 cucumbers in the belly
N I have 1 cucumber left
YaNowHow /^I have (d+) cucumbers$/ do |n|
@basket = Basket.new(n.to_i)
end
When /^I eat (d+) cucumbers$/ do |n|
@belly = Belly.new
@belly.eat(@basket.take(n.to_i))
end
YaGotta /^have (d+) cucumbers in the belly$/ do |n|
@belly.cukes.should == n.to_i
end

38. How Cucumber
supports 28+ languages

39. How Cucumber
supports 28+ languages
grammar Feature
...
end

40. How Cucumber
supports 28+ languages
grammar Feature
...
end
compiled
Ruby

41. How Cucumber
supports 28+ languages
grammar Feature grammar <%= keywords('grammar_name', true) %>
... rule step_keyword
end (<%= keywords('given') %>) /
(<%= keywords('when') %>) /
(<%= keywords('then') %>) /
compiled
(<%= keywords('and') %>) /
(<%= keywords('but') %>)
end
Ruby ...
end

42. "en-lol": "en-au":
name: LOLCAT name: Australian
native: LOLCAT native: Australian
encoding: UTF-8 encoding: UTF-8
feature: OH HAI feature: Crikey
background: B4 background: Background
scenario: MISHUN scenario: Mate
scenario_outline: MISHUN SRSLY scenario_outline: Blokes
examples: EXAMPLZ examples: Cobber
given: I CAN HAZ given: Ya know how
when: WEN when: When
then: DEN then: Ya gotta
and: AN and: N
but: BUT but: Cept
space_after_keyword: true space_after_keyword: true

43. Webrat
Love
visit home_path
click_link "Web"
fill_in "Email", :with => "Rat”
click_button "Love"
Bansky

44. Once more
unto the breach,
dear friends
brace yourself

45. §

46. Feature Request
I want members to be able to
rent a movie with a priority
indicating how much they
want to see the film

47. Talk
to me
Token for Conversation

48. Story
Story: Film Member selects a movie to rent with priority
As a Film member
I want to add movies to my rental list with a priority
So that ...

49. Story
Story: Film Member selects a movie to rent with priority
As a Film member
I want to add movies to my rental list with a priority
So that ...
Give me the movie
NOW!

50. Feature Injection
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
a priority

51. Feature Injection
Value
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
a priority

52. Feature Injection
Value
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
Role a priority

53. Feature Injection
Value
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
Role a priority
Role

54. Feature Injection
Value
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
Role a priority
Role Feature

55. Are we
Acceptance
done yet?
Definition of Done.

56. Scenarios
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
a priority
Scenario: High priority

57. Scenarios
Feature: Film Member selects a movie to rent with priority
In order to maximise allocation of films
The Stock department
Wants Film members to add movies to their rental list with
a priority
Scenario: High priority
Given I'm logged in
And I am viewing the movie "Casshern"
When I choose "High priority"
And I press "Rent"
Then I should see "My rental list"
And I should see "Casshern" in my rental list
And "Casshern" should be marked as "High priority"

58. http://iphonemockup.lkmc.ch

59. Cuking time
About
cuking time!

60. High Res: http://www.screencast.com/t/HbvPTbGy
Low Res: http://www.vimeo.com/5751831

61. Here’s one I Cuked
earlier
Tasty

62. High Res: http://www.screencast.com/t/2E4nfzXotZ
Low Res: http://www.vimeo.com/5751873

63. Getting Customers
using Cucumber

64. Getting Customers
using Cucumber
I don’t
bite

65. The Art of
War Plaintext
, ,
@"===, ,_____cctI
"?AAAAAAAAAAAAAAAA,,,,,,,,,,,,,,,,,,,,,;LLLLLLLLLL
~",,, 1""""""""""""###OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
'"EEEEE, !'"***"~~~~~~"OOOIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
,EEEEE)>"'''???????"WWW!MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
"E.,)+="WWW~~~~~~#"OOO1OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
,~:#")LLL!"+++???????"$$$1==========##/
&LLLLLLLLL;;;;;;;;;;;;,,,/
1#LLLLLLLLLLLLLLLLLLLLLL!
,!###LLLLLL"'EEEE,'"LLLLL!
!######LLL" "EEE" "LLLL"
!#########L! "EEJ. "LL!
!##########1 "JJ*,l"
!############"! ,l"
1##########" 1"~~,~~"
!##########"
!###########!
!###########1
!############!
1#############
!"#############"
!##############!
1##########"' A magnum, By calendron
1#####"'
"""""

66. Don’t force
Feature: Title
In order to <value>
As a <role>
structure I want <feature>

67. Avoid Noise!
Given I am able to login
Given I am able to login

68. Avoid Given I login
Given I authenticate
Inconsistency Given I gain access

69. Given I go to the login page
Balance
And I fill in "username" with "cuke"
And I fill in "password" with "cuker"
And I click "login"
Abstraction Given I'm logged in

70. Use Language
Building blocks
Given /I’m logged in/ do
User.create!(:user => 'josephwilk', :password => "pass")
Given 'I fill in "password" with "josephwilk"'
Given 'I fill in "password" with "pass"'
Given 'I click "login"'
end

71. Email Email-spec
Webpages Webrat
Forms Webrat
Java/Swing Swinger

72. Gherkin Metrics?
Lack of narrative
# language: en-au
Crikey: Eating
Mate: cucumbers Number
Ya now how I have 3 cucumbers
When I eat 2 cucumbers of steps
Ya gotta have 2 cucumbers in the belly
N I have 1 cucumber left
Number of Semantically
noise words similar words

73. Need for SPEED
Slick wheels!

74. Spork
require 'rubygems'
require 'spork'
# Sets up the Rails environment for Cucumber
ENV["RAILS_ENV"] ||= "cucumber"
Spork.prefork do
$ spork cuc
# Load all the heavy stuff...
end
Spork.each_run do
$ cucumber --drb ...
# Load the stuff just for this run...
Before do
Pages.delete_all
end
end

75. Scaling - TestJour
slaves
master
features
Bonjour

76. Need for speed
Webrat 0.8
Celerity 12
Watir 12
Selenium 12.9
0 3.75 7.5 11.25 15
start-up time (seconds)

77. Tagging
Eye Head
Teeth
Foam
Dribble

78. Tagging
Feature: Verify billing
@javascript
Scenario: Missing product description
Scenario: Several products
$ cucumber --tags ~@javascript
$ cucumber --tags @javascript

79. Tag Hooks Before(‘@teleport’) do
teleport.prepare
Attach code to tags end

80. Focused Testing
@teleport
Feature: Invent teleportation
Run just enough tests @money
Feature: Make lots of money

81. Continuous Integration(WIP)
Fail
Work in Pass
Done
Pending
progress
add list $ cucumber --wip
movies movies
--tags @WIP
features/
edit
movies
delete
movies

82. Limiting Tags in Flow
Work in
Done
progress
add add add add
movies movies
movies movies $ cucumber --tags @WIP:3
features/
add add add edit
movies movies
movies movies limit 3 tags
add add add
delete
movies movies
movies movies

83. Avoiding Unrealistic expectations

84. Further reading
• http://cukes.info
• http://wiki.github.com/
aslakhellesoy/cucumber
• http://blog.josephwilk.net

85. Thanks,
Call me
sometime
joe@josephwilk.net
http://github.com/josephwilk
http://github.com/aslakhellesoy/cucumber