Introduction to ATDD with Cucumber and RSpec

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This document discusses an introduction to acceptance test-driven development (ATDD) using Cucumber and RSpec. It explains that ATDD involves collaborating with stakeholders to write automated acceptance tests before development begins. The tests describe features and scenarios in a way that stakeholders can understand. Cucumber uses a plain language format to define tests and map them to code via step definitions. RSpec is also used for unit testing. The document provides examples of Cucumber feature files and touches on integrating Cucumber with RSpec during the development process.

Technology Self Improvement

Introduction to ATDD with
Cucumber and RSpec
Cucumber RSpec ATDD
Kenta Murata

Monday, September 26, 11 1

Kenta Murata @mrkn

CRuby committer
bigdecimal maintainer
OS X platform maintainer
Interested in number system

Ruby Sapporo

http://www.flickr.com/photos/recompile_net/5951998279/
Monday, September 26, 11 2

http://rubyconf.org/schedule

Monday, September 26, 11 4

Introduction to ATDD with
Cucumber and RSpec
Cucumber RSpec ATDD
Kenta Murata

Monday, September 26, 11 5

Acceptance Test
Driven Development

Monday, September 26, 11 7

“
The idea of using an automated
customer Acceptance Test was ﬁrst
proposed in April 2000 by Kent Beck.
Instead of a stakeholder handing over
a requirements document to the
developers without much opportunity
for feedback, the developer and
stakeholder collaborate together to
write a test that the computer can run.

Monday, September 26, 11 9

“ 2000 4 Kent Beck

Monday, September 26, 11 10

“ 2000 4 Kent Beck

Monday, September 26, 11 11

“ 2000 4 Kent Beck

Monday, September 26, 11 12

“ 2000 4 Kent Beck

Monday, September 26, 11 13

“ 2000 4 Kent Beck

Monday, September 26, 11 14

http://pragprog.com/book/hwcuc/the-cucumber-book
Monday, September 26, 11 15

“ The test fails at the time of writing,
because no code has been written yet,
but captures what the stakeholder
cares about and gives everyone a
clear signal as to what it will take to be
done.

Monday, September 26, 11 16

Unit tests v.s. Acceptance Test

Monday, September 26, 11 18

Acceptance tests

Feature (Usecase)
Scenario

Monday, September 26, 11 20

http://pragprog.com/book/hwcuc/the-cucumber-book
Monday, September 26, 11 24

Cucumber
Feature:

Scenario:
Given “ ”
When “ ”
Then
And “ ”

Monday, September 26, 11 25

Given / “([^”]*)” / do |arg|
...
end

When / “([^”]*)” / do |arg|
...
end

Then / / do
...
end

Then / “([^”]*)” / do |arg|
...
end

Monday, September 26, 11 26

Cucumber

Feature Scenario

Monday, September 26, 11 27

1

red 2

3
red

RSpec
4
refactor green
5

refactor green 6
7
Cucumber

The RSpec Book, p.285 (start with Cucumber)
Monday, September 26, 11 28

1

red 2

(RSpec) 3
red

RSpec
4
refactor green
5

refactor green 6
7
Cucumber

The RSpec Book, p.285 (start with Cucumber)
Monday, September 26, 11 28

1

red 2

view spec

(RSpec) 3
red

RSpec
4
refactor green
5

refactor green 6
7
Cucumber

The RSpec Book, p.285 (start with Cucumber)
Monday, September 26, 11 28

1

red 2

view spec

(RSpec) 3
red
view

RSpec
4
refactor green
5

refactor green 6
7
Cucumber

The RSpec Book, p.285 (start with Cucumber)
Monday, September 26, 11 28

1

red 2

view spec

(RSpec) 3
red
view

RSpec
4
refactor green
view 5

refactor green 6
7
Cucumber

The RSpec Book, p.285 (start with Cucumber)
Monday, September 26, 11 28

1

red 2

view spec

(RSpec) 3
red
view

RSpec
4
refactor green
view 5

refactor green 6
7
Cucumber
(cucumber)

The RSpec Book, p.285 (start with Cucumber)
Monday, September 26, 11 28

Demonstration

Monday, September 26, 11 29

http://tatsu-zine.com/books/cuke
Monday, September 26, 11 30

http://pragprog.com/book/achbd/the-rspec-book
Monday, September 26, 11 31

http://pragprog.com/book/hwcuc/the-cucumber-book
Monday, September 26, 11 32

http://pragprog.com/book/rcctr/continuous-testing
Monday, September 26, 11 33

http://pragprog.com/book/jgade/test-driven-development-for-embedded-c
Monday, September 26, 11 34

http://cuke4ninja.com/
Monday, September 26, 11 35

http://ssl.ohmsha.co.jp/cgi-bin/menu.cgi?ISBN=978-4-274-06856-0
Monday, September 26, 11 36

http://www.informit.com/store/product.aspx?isbn=0321503627
Monday, September 26, 11 37

http://www.informit.com/store/product.aspx?isbn=0321601912
Monday, September 26, 11 38

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Introduction to ATDD with Cucumber and RSpec

1. Introduction to ATDD with Cucumber and RSpec Cucumber RSpec ATDD Kenta Murata Monday, September 26, 11 1

2. Kenta Murata @mrkn CRuby committer bigdecimal maintainer OS X platform maintainer Interested in number system Ruby Sapporo http://www.flickr.com/photos/recompile_net/5951998279/ Monday, September 26, 11 2

3. Monday, 1 2010 3 September 26, 11 3

4. http://rubyconf.org/schedule Monday, September 26, 11 4

5. http://rubyconf.org/schedule Monday, September 26, 11 4

6. Introduction to ATDD with Cucumber and RSpec Cucumber RSpec ATDD Kenta Murata Monday, September 26, 11 5

7. ATDD? Monday, September 26, 11 6

8. Acceptance Test Driven Development Monday, September 26, 11 7

9. Monday, September 26, 11 8

10. “ The idea of using an automated customer Acceptance Test was ﬁrst proposed in April 2000 by Kent Beck. Instead of a stakeholder handing over a requirements document to the developers without much opportunity for feedback, the developer and stakeholder collaborate together to write a test that the computer can run. Monday, September 26, 11 9

11. “ 2000 4 Kent Beck Monday, September 26, 11 10

12. “ 2000 4 Kent Beck Monday, September 26, 11 11

13. “ 2000 4 Kent Beck Monday, September 26, 11 12

14. “ 2000 4 Kent Beck Monday, September 26, 11 13

15. “ 2000 4 Kent Beck Monday, September 26, 11 14

16. http://pragprog.com/book/hwcuc/the-cucumber-book Monday, September 26, 11 15

17. “ The test fails at the time of writing, because no code has been written yet, but captures what the stakeholder cares about and gives everyone a clear signal as to what it will take to be done. Monday, September 26, 11 16

18. “ Monday, September 26, 11 17

19. Unit tests v.s. Acceptance Test Monday, September 26, 11 18

20. Unit tests Monday, September 26, 11 19

21. Acceptance tests Feature (Usecase) Scenario Monday, September 26, 11 20

22. Feature Monday, September 26, 11 21

23. Feature Monday, September 26, 11 22

24. Monday, September 26, 11 23

25. http://pragprog.com/book/hwcuc/the-cucumber-book Monday, September 26, 11 24

26. Cucumber Feature: Scenario: Given “ ” When “ ” Then And “ ” Monday, September 26, 11 25

27. Given / “([^”]*)” / do |arg| ... end When / “([^”]*)” / do |arg| ... end Then / / do ... end Then / “([^”]*)” / do |arg| ... end Monday, September 26, 11 26

28. Cucumber Feature Scenario Monday, September 26, 11 27

29. 1 red 2 3 red RSpec 4 refactor green 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

30. 1 red 2 3 red RSpec 4 refactor green 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

31. 1 red 2 3 red RSpec 4 refactor green 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

32. 1 red 2 (RSpec) 3 red RSpec 4 refactor green 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

33. 1 red 2 view spec (RSpec) 3 red RSpec 4 refactor green 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

34. 1 red 2 view spec (RSpec) 3 red view RSpec 4 refactor green 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

35. 1 red 2 view spec (RSpec) 3 red view RSpec 4 refactor green view 5 refactor green 6 7 Cucumber The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

36. 1 red 2 view spec (RSpec) 3 red view RSpec 4 refactor green view 5 refactor green 6 7 Cucumber (cucumber) The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

37. 1 red 2 view spec (RSpec) 3 red view RSpec 4 refactor green view 5 refactor green 6 7 Cucumber (cucumber) The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

38. 1 red 2 view spec (RSpec) 3 red view RSpec 4 refactor green view 5 refactor green 6 7 Cucumber (cucumber) The RSpec Book, p.285 (start with Cucumber) Monday, September 26, 11 28

39. Demonstration Monday, September 26, 11 29

40. http://tatsu-zine.com/books/cuke Monday, September 26, 11 30

41. http://pragprog.com/book/achbd/the-rspec-book Monday, September 26, 11 31

42. http://pragprog.com/book/hwcuc/the-cucumber-book Monday, September 26, 11 32

43. http://pragprog.com/book/rcctr/continuous-testing Monday, September 26, 11 33

44. http://pragprog.com/book/jgade/test-driven-development-for-embedded-c Monday, September 26, 11 34

45. http://cuke4ninja.com/ Monday, September 26, 11 35

46. http://ssl.ohmsha.co.jp/cgi-bin/menu.cgi?ISBN=978-4-274-06856-0 Monday, September 26, 11 36

47. http://www.informit.com/store/product.aspx?isbn=0321503627 Monday, September 26, 11 37

48. http://www.informit.com/store/product.aspx?isbn=0321601912 Monday, September 26, 11 38