TDD Boot Camp - Speaker Deck

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5%% #PPU$BNQ ࿨ా୎ਓ "QS !ϦΫϧʔτςΫϊϩδʔζ

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࿨ా୎ਓ JEUXBEB !U@XBEB HJUIVCUXBEB

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ひとり歩きするスタンド ελϯυ໊ϫΠϧυɾαόϯφ

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ࠓ೔ ΍Δ͜ͱ

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5%%ʹ͍ͭͯͷߨԋ

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http://www.ﬂickr.com/photos/recompile_net/3298985098/ ϖΞϓϩάϥϛϯά1BJS1SPHSBNNJOH

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ίʔυϨϏϡʔେձ

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ςετۦಈ։ൃ ͱ͸Կ͔

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࠷ޙʹ࢒ͬͨ̐ͭͷষͰ͸ɺ ࢲ͕ʮ໰౴ແ༻Ͱ࣮ફ͢΂ ͖ʯͩͱߟ͍͑ͯΔΞδϟΠ ϧͳιϑτ΢ΣΞΤϯδχΞ ϦϯάͷϓϥΫςΟεΛ঺հ ͍͖͍ͯͨ͠ɻ۩ମతʹ͸࣍ ͷ̐ͭͩɻ

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ΞδϟΠϧͳϓϩάϥϛϯά wୈষϢχοτςετ wୈষϦϑΝΫλϦϯά wୈষςετۦಈ։ൃ wୈষܧଓతΠϯςάϨʔ γϣϯ

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ʮಈ࡞͢Δ͖Ε͍ͳίʔυʯ3PO+F⒎SJFT ͷ͜ͷ؆ܿͳݴ༿͕ɺςετۦಈ։ൃʢ5%%ʣ ͷΰʔϧͩɻಈ࡞͢Δ͖Ε͍ͳίʔυ͸͋Β ΏΔҙຯͰՁ஋͕͋Δɻ ᴷ,FOU#FDL

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ಈ࡞͢Δɺ͖Ε͍ͳίʔυ΁ ͖Ε͍ Ԛ͍ (͙͢ʹ͸)ಈ͔ͳ͍ ಈ࡞͢Δ ೋͭͷಓ͕͋Δ

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5%%ͷαΠΫϧ 1.࣍ͷ໨ඪΛߟ͑Δ 2.ͦͷ໨ඪΛࣔ͢ςετΛॻ͘ 3.ͦͷςετΛ࣮ߦࣦͯ͠ഊͤ͞Δ 3FE 4.໨తͷίʔυΛॻ͘ 5.Ͱॻ͍ͨςετΛ੒ޭͤ͞Δ (SFFO 6.ςετ͕௨Δ··ͰϦϑΝΫλϦϯάΛߦ ͏ 3FGBDUPS 7.̍ʙΛ܁Γฦ͢

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͖Ε͍ Ԛ͍ (͙͢ʹ͸)ಈ͔ͳ͍ ಈ࡞͢Δ Red Green Refactoring 5%%ͱԫۚͷճస

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IUUQXXXQMBOFUHFFLDIXQDPOUFOUVQMPBET"5%%DZDMFQOH

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8IZ ސ٬͸ԿނͦΕΛཉ ͍ͯ͠Δͷ͔ 8IBU ԿΛ࡞Ε͹ ྑ͍ͩΖ͏͔ )PX Ͳ͏࡞Ε͹ ྑ͍ͩΖ͏͔ සൟͳϦϦʔεͱσϞ ड͚ೖΕςετ Ϣχοτςετ Ӭ࿨γεςϜϚωδϝϯτՈӬࢯͷࢿྉΑΓ

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ྑ͍ςετ͸ ͲΜͳ΋ͷ͔

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l'*345z ΫϦʔϯςετͷ̑ͭͷنଇ

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'BTU *OEFQFOEFOU 3FQFBUBCMF 4FMG7BMJEBUJOH 5JNFMZ

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'BTU *OEFQFOEFOU 3FQFBUBCMF 4FMG7BMJEBUJOH 5JNFMZ ߴ଎Ͱ͋Δ ಠཱ͍ͯ͠Δ ࠶ݱੑ͕͋Δ ࣗݾݕূՄೳ ద࣌ੑ͕͋Δ

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l"53*1z ྑ࣭ͳςετͷಛੑ

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"VUPNBUFE 5IPSPVHI 3FQFBUBCMF *OEFQFOEFOU 1SPGFTTJPOBM

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"VUPNBUFE 5IPSPVHI 3FQFBUBCMF *OEFQFOEFOU 1SPGFTTJPOBM ࣗಈ పఈ ܁Γฦ͠Մೳ ಠཱ͍ͯ͠Δ ઐ໳త

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'*345 "53*1 ڞ௨͢Δ΋ͷ

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'BTU *OEFQFOEFOU 3FQFBUBCMF 4FMG7BMJEBUJOH 5JNFMZ "VUPNBUFE 5IPSPVHI 3FQFBUBCMF *OEFQFOEFOU 1SPGFTTJPOBM

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Y6OJU5FTU1BUUFSOTΑΓ ςετͷϝϯςφϯείετ ཧ૝ ݱ࣮

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'BTU *OEFQFOEFOU 3FQFBUBCMF 4FMG7BMJEBUJOH 5JNFMZ "VUPNBUFE 5IPSPVHI 3FQFBUBCMF *OEFQFOEFOU 1SPGFTTJPOBM

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ςετίʔυʹ΋ ϦϑΝΫλϦϯά ͕ඞཁ

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σϞ

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'J[[#V[[໰୊ Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. 1͔Β100·Ͱͷ਺ΛϓϦϯτ͢ΔϓϩάϥϜΛॻ͚ɻͨͩ͠3 ͷഒ਺ͷͱ͖͸਺ͷ୅ΘΓʹňFizzŉͱɺ5ͷഒ਺ͷͱ͖͸ ňBuzzŉͱϓϦϯτ͠ɺ3ͱ5྆ํͷഒ਺ͷ৔߹ʹ͸ňFizzBuzzŉͱ ϓϦϯτ͢Δ͜ͱɻ http://tickletux.wordpress.com/2007/01/24/using-fizzbuzz-to-find-developers-who-grok-coding/ http://www.aoky.net/articles/jeff_atwood/why_cant_programmers_program.htm

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5%%ͷεΩϧ w໰୊Λখ͘͞෼ׂ͢Δ wา෯Λௐ੔͢Δ wςετˠԾ࣮૷ˠࡾ֯ଌྔˠ࣮૷ wςετˠԾ࣮૷ˠ࣮૷ wςετˠ໌നͳ࣮૷ wςετͷߏ଄ԽͱϦϑΝΫλϦϯά

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ςετۦಈ։ൃ͸ɺϓϩάϥϛϯάதͷෆ҆Λ ؅ཧ͢Δख๏ͩɻෆ҆ͱ͸ʮ͜Ε͸ࠔ೉ͳ໰୊ ͳͷͰɺ࠷ॳ͔Β͢΂ͯΛݟ௨ͤΔΘ͚Ͱ͸ͳ ͍ʯͱ͍͏ਅͬ౰ͳײ֮ͷ͜ͱͩɻ 5%%͸ϓϩάϥϛϯάதͷઃܭ൑அͱϑΟʔ υόοΫͷؒʹ͋ΔΪϟοϓΛೝࣝ͢Δ͜ͱͰ ͋ΓɺͦͷΪϟοϓΛίϯτϩʔϧ͢Δٕ๏Ͱ ΋͋Δɻ ʰςετۦಈ։ൃʱΑΓ

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5%%ͷ ಋೖޮՌ

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© Towersquest, Inc. 2010. all rights reserved. 5%%ಋೖޮՌ .4 *#. !38 IBM Driver MS Windows MS MSN MS Visual Studio ιʔείʔυαΠζ (KLOC) 41 6 26 155.2 ςετίʔυαΠζ (KLOC) 28.5 4 23.2 60.3 TDDΛ࠾༻͍ͯ͠ͳ͍ྨࣅϓϩ δΣΫτͰͷܽؕີ౓Λ̍ͱ͠ ͨͱ͖ͷܽؕີ౓ 0.61 0.38 0.24 0.09 TDD࠾༻ʹΑΓ૿Ճͨ͠ίʔυ ࣮૷࣌ؒ(؅ཧऀͷݟੵʹΑΔ) 15ʙ20% 25ʙ35% 15% 20ʙ25% N. Nagappan, M. E. Maximilien, T. Bhat and L. Williams: Realizing quality improvement through test driven development: results and experiences of four industrial teams, Journal of Empirical Software Engineering, vol. 13, pp. 289-302 (2008)

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© Towersquest, Inc. 2010. all rights reserved. 5%%ಋೖޮՌ ΤϦΫιϯଞ w 5%%Λ࣮ࢪͨ͠৔߹ʹใࠂ͞Ε͍ͯΔ஌ݟ ‣ ػೳςετͰͷෆ۩߹ݕग़਺͕࡟ݮ͞Εͨ ‣ ίʔσΟϯά ࣮૷ ͷ͕࣌ؒˋ૿͑ͨ ‣ ςετͷΧόϨοδ͕େ͖͘ͳͬͨ w ඃݧऀΛର৅ͱͨ͠Ξϯέʔτ ‣ ͷඃݧऀ͕σόοάͷ޻਺ΛݮΒ͢ͱײͨ͡ ‣ ͷඃݧऀ͕ཁٻ͕ચ࿅͞ΕΔͱײͨ͡ ‣ ͷඃݧऀ͕ίʔυͷ඼࣭Λ্͛Δͱײͨ͡ ‣ ͷඃݧऀ͕։ൃ޻਺ΛݮΒ͢ͱײͨ͡ !39 Boby George, a and Laurie Williams: A structured experiment of test-driven development, Journal of Information and Software Technology Vol. 46, No. 5, p. 337-342(2004)

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w໰୊Λখ͘͞෼ׂ͢Δ wา෯Λௐ੔͢Δ wςετˠԾ࣮૷ˠࡾ֯ଌྔˠ࣮૷ wςετˠԾ࣮૷ˠ࣮૷ wςετˠ໌നͳ࣮૷ wςετͷߏ଄ԽͱϦϑΝΫλϦϯά ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠