Rack::ClientSpec

Rack::ClientSpec can test your client behavior
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1. Rack::ClientSpec
   @harukasan / ͸Δ͔͞Μ
   

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2. ωλͳͷͰਅʹड͚ͯ͸͍͚ͳ͍
   

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3. Web is based on a browser
   • Web͸͍͍ͩͨϒϥ΢β͕ਖ਼͍͜͠ͱ͕લఏʹͳ͍ͬͯΔ
   • ϒϥ΢β͕HTTP/HTML/CSS/JSΛ࣮૷ͯ͘͠ΕͯΔ͓͔͛Ͱ

   ๻Β͸αʔϏεΛఏڙͰ͖Δ
   • ϒϥ΢β੍࡞ऀʹ͸಄͕͕͋Βͳ͍
   

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4. Some clients are in the blackbox
   • ͱ͸͍͑શͯͷΫϥΠΞϯτͷڍಈ͕Θ͔ͬͯΔΘ͚Ͱ͸ͳ͍
   • ISUCONͩͱΫϥΠΞϯτͷڍಈ͸Ṗ
   

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5. E2E test for server
   Server
   Mock
   send a request
   get a response
   

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6. Capybara
   it "returns 200" do
   visit '/'
   expect(page).to have_content 'Success'
   end
   

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7. Test a client
   

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8. Test a client
   Mock
   Client
   send a response (if you need)
   get a request
   

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9. Rack::ClientSpec
   rubygems.org/gems/rack-client_spec
   

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10. Rack::ClientSpec
    • ΫϥΠΞϯτͷڍಈΛαʔό͔ΒςετͰ͖Δ
    • Rack MiddlewareͳͷͰRackΠϯλʔϑΣʔεͳΒ͍͍ͩͨ૊ΈࠐΊΔ
    • Θ͟Θ͟ϞοΫΛͭ͘Βͳͯ͘΋αʔόʹ૊ΈࠐΊͯศར
    • power_assertศར
    github.com/harukasan/rack-client_spec
    

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11. Insert ClientSpec to your rack
    Server
    Client
    send a response (if you need)
    get a request
    ClientSpec
    

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12. Insert ClientSpec to your rack app
    require 'rack'
    require 'rack/lobster'
    require 'rack/client_spec'
    require 'rack/lobster_spec'
    use Rack::ClientSpec, LobsterSpec # <- Insert Clientspec
    run Rack::Lobster.new
    

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13. Write a test case
    require 'rack/client_spec'
    class LobsterSpec < Rack::ClientSpec::TestCase # <-- test case
    def test_flip # <-- test method
    get '/' do |req, res| # <-- expect request
    assert { res.status == 200 }
    end
    get '/?flip=left' do |req, res| # <-- expect request
    assert { req['HTTP_REFERER'] == 'http://localhost:9292/' }
    end
    end
    end
    

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14. TODO
    • ϦΫΤετͷ్தʹ༨ܭͳϦΫΤετ͕དྷΔͱ͚͜ΔͷΛͳ͓͢
    • ϦΫΤετ͕དྷͳ͍͜ͱΛςετ͍ͨ͠
    • Cache-Controlςετ͍ͨ͠
    • όάϑΟοΫε
    

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