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Coding Kata TDD practice with

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

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TDD Test Driven Developement

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–Robert C. Martin “ཁ͢ΔʹTDD͸ϓϩͷબ୒ͳͷͩɻ ࣮֬ੑɾܽؕࠞೖ཰ͷ௿Լɾ༐ؾɾ
 υΩϡϝϯτɾઃܭΛଅਐ͢Δن཯ͩɻ”

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ϓϩͳΒ͹TDDΛ࢖͏

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TDDͷࡾݪଇ 1. ࣦഊ͢ΔςετΛॻ͘·Ͱ
 ϓϩμΫγϣϯίʔυΛॻ͔ͳ͍ 2. ࣦഊͤ͞Δ໨తҎ֎ͰςετΛॻ͔ͳ͍ 3. ࣦഊ͢Δςετ͕੒ޭ͢Δ·Ͱ
 ଞͷϓϩμΫγϣϯίʔυΛॻ͔ͳ͍

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Red Green Refactoring TDDͷ αΠΫϧ

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

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࿅श

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Coding Kata

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

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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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ཁٻ࢓༷ •roll(pins: Int) ϓϨΠϠʔ͕ϘʔϧΛ౤͛ͨ࣌ʹݺ͹ΕΔɻ
 Ҿ਺͸౗ͨ͠ϐϯ਺ɻ •score(): Int ͜ͷήʔϜͷείΞΛฦ͢ Game + roll(pins: Int) + score(): Int

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࣮ԋ Scala/spec2/IntelliJ/sbt

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

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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 )