TDDの練習 Coding Kata の実践

Transcript

1. Coding Kata
   TDD practice with
   

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2. hakobe
   hatena: id:hakobe932
   twitter: @hakobe
   github: @hakobe
   

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3. TDD
   Test Driven Developement
   

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4. –Robert C. Martin
   “ཁ͢ΔʹTDD͸ϓϩͷબ୒ͳͷͩɻ
   ࣮֬ੑɾܽؕࠞೖ཰ͷ௿Լɾ༐ؾɾ

   υΩϡϝϯτɾઃܭΛଅਐ͢Δن཯ͩɻ”
   

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5. ϓϩͳΒ͹TDDΛ࢖͏
   

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6. TDDͷࡾݪଇ
   1. ࣦഊ͢ΔςετΛॻ͘·Ͱ

   ϓϩμΫγϣϯίʔυΛॻ͔ͳ͍
   2. ࣦഊͤ͞Δ໨తҎ֎ͰςετΛॻ͔ͳ͍
   3. ࣦഊ͢Δςετ͕੒ޭ͢Δ·Ͱ

   ଞͷϓϩμΫγϣϯίʔυΛॻ͔ͳ͍
   

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7. Red
   Green
   Refactoring
   TDDͷ
   αΠΫϧ
   

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8. ࣮ફͰ͖ͯΔ?
   •͸͡ΊʹςετΛॻ͘บ͸Ͱ͖ͯΔ?
   •͏·͘αΠΫϧΛ·ΘͤͯΔ?
   •ςετॻ͘ͷ೉͍͠෦෼΋ॻ͚Δ?
   •Fake It / Obvious Implementation /
   Triangulation ͏·͘Ͱ͖ͯΔ?
   

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9. ࿅श
   

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10. Coding Kata
    

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11. Coding Kata
    ۭखͷܕʹͳͧΒ͑ͨɺϓϩάϥϛϯάͷ࿅शํ๏ɻ
    !
    جຊతͳ՝୊Λ܁Γฦ͠࿅श͢Δ͜ͱͰɺ
    TDDͷΑ͏ͳن཯΍ɺΤσΟλͷૢ࡞ํ๏ɺ
    Α͋͘Δ໰୊ͷղܾखॱͳͲΛମʹછΈࠐ·ͤΔɻ
    

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12. Ϙ΢ϦϯάήʔϜ
    ‣10ϑϨʔϜ x ࠷େ 2 ౤ͯ͠ 10 ݸͷϐϯΛ౗͢
    ‣ετϥΠΫ
    Ϙʔφε: ࣍ͷ 2 ౤ͷ౗ͨ͠ϐϯ਺
    ‣εϖΞ
    Ϙʔφε: ࣍ͷ 1 ౤ͷ౗ͨ͠ϐϯ਺
    ‣10ϑϨʔϜ໨
    εϖΞ͔ετϥΠΫ͕ग़ͨΒ࠷େ3౤Ͱ͖Δ
    

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13. ཁٻ࢓༷
    •roll(pins: Int)
    ϓϨΠϠʔ͕ϘʔϧΛ౤͛ͨ࣌ʹݺ͹ΕΔɻ

    Ҿ਺͸౗ͨ͠ϐϯ਺ɻ
    •score(): Int
    ͜ͷήʔϜͷείΞΛฦ͢
    Game
    + roll(pins: Int)
    + score(): Int
    

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14. ࣮ԋ
    Scala/spec2/IntelliJ/sbt
    

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15. ·ͱΊ
    • TDD͸ϓϩͷश׳
    • Coding KataͰ࿅शͯ͠਎ʹ͚ͭΑ͏
    ࣮ࡍ͏·͍ͬͯ͘Δ?
    - TDDͷϦζϜ͕਎ʹͭ͘
    - ։ൃ؀ڥྑ͘ͳΔ
    - ϓϩάϥϛϯάݴޠͷػೳΛֶ΂Δ
    

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16. ࢀߟจݙ
    • ΞδϟΠϧιϑτ΢ΣΞ։ൃͷԞٛ

    (ISBN: 978-4797347784)
    • ε͸εϖοΫͷε ʲୈ 1 ճʳ RSpec ͷ֓ཁ
    ͱɺRSpec on Rails (Ϟσϧฤ)

    ( http://magazine.rubyist.net/?0021-Rspec )
    • ͜ͷൃදͷαϯϓϧίʔυ ( https://
    github.com/hakobe/coding-kata-bowling )
    

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