Testing Merb
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Testing Merb

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    Testing Merb Testing Merb Presentation Transcript

    • Testing Merb The Right Way
    • Why Test?
    • TDD
    • TDD and Regressions
    • TDD and Regressions I am not saying TDD is bad, but this talk doesn’t focus on mock- driven TDD.
    • Resiliant Against Refactoring
    • 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
    • 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
    • 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
    • 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
    • How to Test Three Rules
    • Broken Interface means failing tests
    • Working Interface means passing tests
    • Write tests about what you care about
    • http://example.com/foo Filters Controller Views Helpers What Happens in Your App
    • http://example.com/foo Your App What You Care About
    • http://example.com/foo 4 Filters Controller H Views Partials Helpers Refactoring
    • Iteration 1
    • 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
    • dispatch_to(Foo, :awesome) do |cont| cont.should_receive(:awesome_string) end
    • dispatch_to(Foo, :awesome) do |cont| cont.should_receive(:awesome_string) end
    • Iteration 2
    • class Bar < Application def coolness render end end Merb::Router.prepare do match(quot;/foo/awesomequot;). to(:controller => Bar, :action => :coolness). name(:awesome) end
    • dispatch_to(Foo, :awesome) do |cont| cont.should_receive(:awesome_string) end
    • dispatch_to(Foo, :awesome) do |cont| AIL cont.should_receive(:awesome_string) end F
    • request(quot;/foo/awesomequot;).body. should =~ /Awesome/
    • request(url(:awesome)).body. should =~ /Awesome/
    • Broken Interface means failing tests
    • Working Interface means passing tests
    • Write tests about what you care about
    • “It’s Too Hard”
    • Let’s Make it Easy
    • request(url(:speakers)) request(resource(@speaker)) request(quot;/foo/speakersquot;)
    • request(url(:speakers)) one method request(resource(@speaker)) request(quot;/foo/speakersquot;)
    • Sessions are automatically sticky in a spec
    • 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
    • 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
    • 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
    • describe quot;/loginquot;, :given => quot;successful loginquot; do it quot;should let you inquot; do request(quot;/homequot;).should be_successful end end simpler
    • describe quot;/loginquot;, :given => quot;successful loginquot; do it quot;should let you inquot; do request(quot;/homequot;).should be_successful end end simpler
    • Request Rack status body headers
    • request() helper Rack status body headers
    • 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;))
    • 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
    • request(quot;/fooquot;).should be_client_error request(quot;/fooquot;).should( have_content_type(:json))
    • Thank you.