1. Testing Merb
The Right Way

2. Why Test?

3. TDD

4. TDD and Regressions

5. TDD and Regressions
I am not saying
TDD is bad, but
this talk doesn’t
focus on mock-
driven TDD.

6. Resiliant Against Refactoring

7. class Awesome
def hello
puts quot;~ Hello ~quot;
end
end
describe Awesome do
it quot;prints helloquot; do
awesome = Awesome.new
awesome.should_receive(:puts)
awesome.hello
end
end

8. class Awesome
def hello
awesome_print quot;~ Hello ~quot;
end
def awesome_print(str)
print quot;#{str}nquot;
end
end
describe Awesome do
it quot;prints helloquot; do
awesome = Awesome.new
awesome.should_receive(:puts)
awesome.hello
end
end

9. class Awesome
def hello
awesome_print quot;~ Hello ~quot;
end
def awesome_print(str)
print quot;#{str}nquot;
end
end
describe Awesome do
it quot;prints helloquot; do
AIL
awesome = Awesome.new
F
awesome.should_receive(:puts)
awesome.hello
end
end

10. class Awesome
def hello
awesome_print quot;~ Hello ~quot;
end
def awesome_print(str)
print quot;#{str}nquot;
end
end
describe Awesome do
it quot;prints helloquot; do
capture { Awesome.new.hello }.
should =~ /Hello/
end
end

11. How to Test Three Rules

12. Broken Interface means failing tests

13. Working Interface means passing tests

14. Write tests about what you care about

15. http://example.com/foo
Filters
Controller
Views
Helpers
What Happens in Your App

16. http://example.com/foo
Your App
What You Care About

17. http://example.com/foo
4 Filters
Controller
H Views Partials
Helpers
Refactoring

18. Iteration 1

19. class Foo < Application
def awesome
awesome_string
end
def awesome_string
quot;Awesomequot;
end
end
Merb::Router.prepare do
match(quot;/foo/awesomequot;).
to(:controller => Foo,
:action => :awesome).
name(:awesome)
end

20. dispatch_to(Foo, :awesome) do |cont|
cont.should_receive(:awesome_string)
end

21. dispatch_to(Foo, :awesome) do |cont|
cont.should_receive(:awesome_string)
end

22. Iteration 2

23. class Bar < Application
def coolness
render
end
end
Merb::Router.prepare do
match(quot;/foo/awesomequot;).
to(:controller => Bar,
:action => :coolness).
name(:awesome)
end

24. dispatch_to(Foo, :awesome) do |cont|
cont.should_receive(:awesome_string)
end

25. dispatch_to(Foo, :awesome) do |cont|
AIL
cont.should_receive(:awesome_string)
end
F

26. request(quot;/foo/awesomequot;).body.
should =~ /Awesome/

27. request(url(:awesome)).body.
should =~ /Awesome/

28. Broken Interface means failing tests

29. Working Interface means passing tests

30. Write tests about what you care about

31. “It’s Too Hard”

32. Let’s Make it Easy

33. request(url(:speakers))
request(resource(@speaker))
request(quot;/foo/speakersquot;)

34. request(url(:speakers))
one method
request(resource(@speaker))
request(quot;/foo/speakersquot;)

35. Sessions are automatically sticky in a spec

36. it quot;should let you inquot; do
request(quot;/loginquot;, :method => :post,
:params => {:username => quot;userquot;,
:password => quot;passquot;})
request(quot;/homequot;).should be_successful
end

37. it quot;should let you inquot; do
request(quot;/loginquot;, :method => :post,
:params => {:username => quot;userquot;,
:password => quot;passquot;})
request(quot;/homequot;).should be_successful
login
end

38. it quot;should let you inquot; do
request(quot;/loginquot;, :method => :post,
:params => {:username => quot;userquot;,
:password => quot;passquot;})
request(quot;/homequot;).should be_successful
end
you’re logged in

39. describe quot;/loginquot;, :given => quot;successful loginquot; do
it quot;should let you inquot; do
request(quot;/homequot;).should be_successful
end
end
simpler

40. describe quot;/loginquot;, :given => quot;successful loginquot; do
it quot;should let you inquot; do
request(quot;/homequot;).should be_successful
end
end
simpler

41. Request
Rack
status body headers

42. request() helper
Rack
status body headers

43. request(quot;/fooquot;).body.should == quot;helloquot;
request(quot;/fooquot;).should have_xpath(quot;//h1quot;)
request(quot;/fooquot;).should(
have_selector(quot;h1:contains(text)quot;))

44. request(quot;/fooquot;).body.should == quot;helloquot;
request(quot;/fooquot;).should have_xpath(quot;//h1quot;)
request(quot;/fooquot;).should(
have_selector(quot;h1:contains(text)quot;))
1.0 final

45. request(quot;/fooquot;).should be_client_error
request(quot;/fooquot;).should(
have_content_type(:json))

46. Thank you.