TDD will always be in your heart

Niigata.rb #3 での発表資料です。

Transcript

1. ג Ӭ࿨γεςϜϚωδϝϯτ ∁ڮ
   ݈Ұ LFOUBLBIBTIJ!FTNDPKQ IUUQTIVDSFBNOFU 
   /JJHBUBSC
    ςετۦಈ։ൃ͸ ΈΜͳͷ ৺ͷதʹ͋Δ
3. ࣗݾ঺հ ,FOJDIJ
   5",")"4)* IUUQTIVDSFBNOFU UXJUUFS
   
   !LFODIBO HJUIVC
   
   LFODIBO 5IJOL1BE
   9 (FOUPP 'VOUPP
   -JOVY 5JMJOH
   8JOEPX
   .BOBHFS ,JOFTJT
   $POUPVSFE
   ,FZCPBSE 7JN (BMBYZ
   /FYVT
   /FYVT
   
4. JEPCBUBJP
5. ࢲ͕ςετۦಈ։ൃΛͲͷΑ͏ʹ ଊ͍͑ͯͯɺԿ͕େ੾ͩͱײͯ͡ ͍Δ͔Λ঺հ͠·͢ɻͦΕΛ౿· ͑ͯɺ࣮ࡍʹίʔυΛॻ͘ͱ͖ʹ ԿΛߟ͍͑ͯΔ͔ΛTDDBC ௕Ԭ 1.0 ͷ͓୊Λྫʹ͓࿩͠·͢ɻ ࠓ೔ͷ͓࿩
6. •ࢲͱςετۦಈ։ൃ •TDDBC ௕Ԭ1.0 Reloaded ࠓ೔ͷ͓࿩
7. •ࢲͱςετۦಈ։ൃ •TDDBC ௕Ԭ1.0 Reloaded ࠓ೔ͷ͓࿩
8. •؆୯ʹԿ౓΋ಈ͔ͤΔ •໰୊ΛҰͭͣͭղܾͰ͖Δ •ݱࡏ஍ΛݟࣦΘͳ͍ •ར༻ऀͷࢹ఺Ͱબ୒Ͱ͖Δ ࢲͱςετۦಈ։ൃ
9. ؆୯ʹԿ౓Ͱ΋ಈ͔ͤΔ http://www.flickr.com/photos/thomashawk/2681744739/
10. ೥ɺ+6OJUͱ ͷग़ձ͍ʹΑͬͯɺ ࢲ͸NBJO
    ؔ਺ͷढ റ͔Βղ͖์ͨΕͨ
11. +6OJUͱग़ձ͏લ  ϓϩάϥϜΛॻ͘  NBJOΛॻ͘  ໨ࢹͰ֬ೝ͢Δ  ϓϩάϥϜΛͪΐͬͱมߋ͢Δ  ໨ࢹͰ֬ೝ͢Δ  ϓϩάϥϜΛ݁ߏมߋ͢Δ  NBJOΛॻ͖׵͑Δ  ໨ࢹͰ֬ೝ͢Δ  SZ
12. •ੲͷmainΛͲ͏࢒͔͢ •mainΛॻ͖׵͑Δखؒ •໨ࢹ֬ೝͷݶք खಈͰ໨ࢹ֬ೝ
13. •܁Γฦ͠ಈ͔ͤΔ •؆୯ʹಈ͔ͤΔ •໨ࢹ֬ೝ͠ͳ͍͍ͯ͘ +6OJU ςεςΟϯάϑϨʔϜϫʔΫ
14. ςεςΟϯάϑϨʔϜϫʔΫ ʹΑͬͯखಈͱ໨ࢹ֬ೝͷख ͕ؒͳ͘ͳΓɺϓϩμΫτ ίʔυʹूத͢Δ͜ͱ͕Ͱ ͖ΔΑ͏ʹͳΔɻ ؆୯ʹԿ౓Ͱ΋ಈ͔ͤΔ
15. ໰୊ΛҰͭͣͭղܾͰ͖Δ http://www.flickr.com/photos/theotter/6590636397
16. ϓϩάϥϚ͕ۀ຿Ͱղ͔ͳ ͚Ε͹͍͚ͳ͍໰୊͸ɺ FizzBuzzΑΓͣͬͱෳࡶͰ ೉͍͠ɻ ݱ࣮͸ݫ͍͠
17. ෳࡶͱ͸ $PNQMJDBUFE $PNQMFY
18. •Complex(ෳࡶ) •গͣͭ͠୳ࡧ͢Δ •Complicated(ೖΓ૊Μͩ) •1ͭ1ͭʹ෼ׂ͢Δ ෳࡶ͞ʹର͢ΔΞϓϩʔν
19. •Complex(ෳࡶ) •গͣͭ͠୳ࡧ͢Δ •Complicated(ೖΓ૊Μͩ) •1ͭ1ͭʹ෼ׂ͢Δ ෳࡶ͞ʹର͢ΔΞϓϩʔν ଟ͘ͷ৔߹͸ ͪ͜Βͷෳࡶ͞
20. ͋ΔαʔϏεʹHTTPͰΞΫηε ͯ͠औಘͨ͠JSONΛDBʹอଘ͠ ͯ΄͍͠ɻΤϥʔ͕ى͖ͨͱ͖ ͸ϩάΛग़ྗͯ͠ऴྃ͢Δɻ ෳࡶͳ໰୊Λ෼ղ͢Δ
21. ͋ΔαʔϏεʹHTTPͰΞΫηεͯ͠ɺϨεϙ ϯεͷJSONΛDBʹอଘͯ͠΄͍͠ɻͨͩ͠ɺ JSONͷϑΥʔϚοτ͕ظ଴͢Δ΋ͷͱҧͬͨ ৔߹͸ϩάΛग़ྗͯ͠ऴྃͯ͠΄͍͠ɻ4XXΤ ϥʔͷͱ͖͸ϩάΛग़ྗͯ͠ϓϩάϥϜΛऴ ྃͯ͠΄͍͠ɻ5XXΤϥʔͷͱ͖͸ͯ͠ճ਺Ϧ τϥΠ͠ɺͦΕͰ΋ͩΊͳ৔߹͸ϩάΛग़ྗ ͯ͠ऴྃͯ͠΄͍͠ɻ ෳࡶͳ໰୊Λ෼ղ͢Δ
22. describe SomeClass do context 'εςʔλείʔυ͕200' do context 'JSONͷϑΥʔϚοτ͕ਖ਼͍͠' do end context 'JSONͷϑΥʔϚοτ͕ෆਖ਼' do end end context 'εςʔλείʔυ͕4XX' do end context 'εςʔλείʔυ͕5XX' do context 'ϦτϥΠͯ͠੒ޭ͢Δ' do end context 'ϦτϥΠͯ͠΋5XX' do end end end ςετʹͯ͠ΈΔ
23. ෳࡶͳ໰୊Λෳࡶͳ··ղ ͜͏ͱ͢Δͱɺςετ͕ॻ͖ ʹ͘͘ͳΔɻςετ͕ॻ͖΍ ͘͢ͳΔ·Ͱ෼ղ͠ͳ͍ͱ͍ ͚ͳ͍ɻ ໰୊ΛҰͭͣͭղܾͰ͖Δ
24. ݱࡏҐஔΛݟࣦΘͳ͍ http://www.flickr.com/photos/justinph/3459757014/
25. •޲͔͍ͬͯΔํ޲͸ਖ਼͍͔͠ •࣍͸ԿΛ͢Ε͹͍͍ͷ͔ •Ͳ͜·ͰऴΘͬͨͷ͔ ෆ͕҆͋Δ
26. • ׬ྃ৚݅Λઌʹߟ͑Δ • ࠓ͸ςετίʔυΛॻ͍͍ͯΔ ͷ͔ɺϓϩμΫτίʔυΛॻ͍ ͍ͯΔͷ͔ • ࠓ·Ͱ΍͖ͬͯͨ͜ͱ͸ςετ Մೳͳίʔυʹͳ͍ͬͯΔ ςετۦಈ։ൃͳΒ
27. ݱࡏ஍Λ೺Ѳ͢Δ ࢓༷Λ ߟ͑Δ ςετΛ ॻ͘ ϓϩμΫτ ίʔυΛॻ͘ ࣮૷Λ ߟ͑Δ 3&% (3&&/
28. ͜Ε͔Βࣗ෼͕ॻ͘΋ͷ͕Ͳ ͏ಈ͍ͯཉ͍͔͠(ͱ͍͏ظ ଴ɺئ๬)͸ඞͣ͋Δɻ ςετϑΝʔετʁ
29. ΰʔϧ͸ݟ͍͑ͯΔɻ ࣍ʹͲ͜΁ߦ͚͹͍͍ͷ͔͸ ܾ·͍ͬͯΔɻ ࠓ·Ͱ௨͖ͬͯͨಓ͸ςετ ίʔυͱͯ͠࢒͍ͬͯΔɻ ݱࡏ஍ΛݟࣦΘͳ͍
30. ར༻ऀͷࢹ఺Ͱબ୒Ͱ͖Δ http://www.flickr.com/photos/samhines/1588018876
31. “ ࣗ෼͕ίʔυΛॻ͘ͱ͍͏ ࢹ఺͚ͩͰ͸ͳͯ͘ɺίʔ υͷར༻ऀͱͯ͠ͷɺࣗ෼ ͕࠷ॳʹͦͷίʔυΛ࢖͏ ਓͩͱ͍͏ࢹ఺Λ࣋ͭ͜ͱ ͕Ͱ͖Δɻ t-wada gihyo.jp [ಈըͰղઆ]࿨ా୎ਓͷ“ςετۦಈ։ൃ”ߨ࠲
32. “ ίʔυʹͨ͠΋ͷ ͱ͠ͳ͔ͬͨ͜ͱ ͕ϓϩάϥϛϯά Kakutani Shintaro - Developpers Summit 2012 Agile Manifest Decade -
33. •ม਺໊ •ϝιου໊ •Ϋϥε໊ •Ҿ਺ •etc... ϓϩάϥϛϯά͸બ୒
34. ಡΈ΍͢͞ͱ࢖͍΍͢͞Ͱબ୒ Version.valid?('JDK7u40') JavaVersion.valid?('JDK7u40') 'JDK7u40'.valid_java_version? etc...
35. ར༻ऀͷࢹ఺Ͱςετίʔυ Λબ୒͢Δɻ ςετΛյ͞ͳ͍Α͏ʹ։ൃ ऀͷࢹ఺ͰϓϩμΫτίʔυ Λબ୒͢Δɻ બ୒Ͱ͖Δ
36. •؆୯ʹԿ౓΋ಈ͔ͤΔ •໰୊ΛҰͭͣͭղܾͰ͖Δ •ݱࡏҐஔΛݟࣦΘͳ͍ •ར༻ऀͷࢹ఺Ͱબ୒Ͱ͖Δ ςετۦಈ։ൃͷՁ஋
37. ౰ͨΓલͷ͜ ͱΛ౰ͨΓલ ʹ΍Δ http://www.flickr.com/photos/evoo73/3222220257
38. •ςετۦಈ։ൃͷՁ஋ •TDDBC ௕Ԭ1.0 Reloaded ࠓ೔ͷ͓࿩
40. Javaͷόʔδϣϯͷେখൺ ֱͱɺ࣍ʹϦϦʔε͞ΕΔ όʔδϣϯ൪߸Λௐ΂͍ͨɻ ͓୊
41. 1.࢓༷ͷໃ६Λߟ͑Δ 2.TODOϦετΛ࡞Δ 3.ςετΛॻ͘ 4.ϓϩμΫτίʔυΛॻ͘ 5.ϦϑΝΫλϦϯά͢Δ 6.3ʙ5Λ܁Γฦ͢ 5%%#$Ͱͷεςοϓ
42. 1.࢓༷ͷໃ६Λߟ͑Δ 2.TODOϦετΛ࡞Δ 3.ςετΛॻ͘ 4.ϓϩμΫτίʔυΛॻ͘ 5.ϦϑΝΫλϦϯά͢Δ 6.3ʙ5Λ܁Γฦ͢ 5%%#$Ͱͷεςοϓ
44. • ࣮૷ΛΠϝʔδͯ͠ॳΊͯݟ͔ͭΔໃ६΋͋Δ • ࠷ॳͷόʔδϣϯ͸ʮ̌ʯʮ̍ʯʁ • ٙ໰Λղফͯ͠ɺೲಘͯ͠ਐΊΔ͜ͱ͕Ͱ͖Δ • աڈͷ࣮੷΍ϦϦʔεͷίετɺϢʔβͷར ศੑΛߟ͑Δͱ༧ఆ֎ͷΞοϓσʔτ͸5ճ Ҏ಺ʹͳΔ • ʮސ٬ͷຊ౰ʹཉ͔ͬͨ͠΋ͷʯ໰୊ • ࣮͸ʮ͢΂ͯͷPCͷJavaΛৗʹ࠷৽ʹอͪ ͍ͨʯͱ͍͏͚ͩͩͬͨ ର࿩ͷͨΊʹߟ͑Δ
45. 1.࢓༷ͷໃ६Λߟ͑Δ 2.TODOϦετΛ࡞Δ 3.ςετΛॻ͘ 4.ϓϩμΫτίʔυΛॻ͘ 5.ϦϑΝΫλϦϯά͢Δ 6.3ʙ5Λ܁Γฦ͢ 5%%#$Ͱͷεςοϓ
46. Javaͷόʔδϣϯͷେখൺ ֱͱɺ࣍ʹϦϦʔε͞ΕΔ όʔδϣϯ൪߸Λௐ΂͍ͨɻ ͓୊
47. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • ࣍ͷόʔδϣϯΛௐ΂Δ ෳࡶͳ໰୊Λ෼ղ͢Δ
48. 1.࢓༷ͷໃ६Λߟ͑Δ 2.TODOϦετΛ࡞Δ 3.ςετΛॻ͘ 4.ϓϩμΫτίʔυΛॻ͘ 5.ϦϑΝΫλϦϯά͢Δ 6.3ʙ5Λ܁Γฦ͢ 5%%#$Ͱͷεςοϓ
49. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ
50. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ
51. •ϝιου໊͸ʁ •γάωνϟ͸Ͳ͏͢Δʁ •ΫϥεΛ࡞Δʁ •Ϟδϡʔϧʹ͢Δʁ 5IJOL
52. ·ͣ͸͍Ζ͍Ζॻ͍ͯΈΔ Version.valid?('JDK7u40') JavaVersion.valid?('JDK7u40') 'JDK7u40'.valid_java_version? etc...
53. ·ͣ͸͍Ζ͍Ζॻ͍ͯΈΔ Version.valid?('JDK7u40') JavaVersion.valid?('JDK7u40') 'JDK7u40'.valid_java_version? etc... Ϋϥε໊͕ Ұൠత͗͢Δ ͓ᔬམ͚ͩͲจࣈྻ Λ֦ு͢Δͷ͸ʜ
54. ςετΛॻ͘ require_relative '../lib/ java_version' describe JavaVersion do it { should be } end
55. •ςετ͕ؒҧ͍ͬͯͳ͍͜ͱ Λ֬ೝ͢Δ •ޙ͔ΒςετΛॻ͍ͯҰൃͰ ௨ͬͨΒɺΘ͟ͱམͪΔΑ͏ ʹͯ֬͠ೝ͠·ͤΜ͔ʁ 3&%͔Β࢝ΊΑ
56. ϓϩμΫτίʔυΛॻ͘ class JavaVersion end
57. •ςετۦಈ։ൃͷ؀ڥ͕ ੔ͬͨ߹ਤ •ϥΠϒϥϦͳͲ etc... •σΟϨΫτϦߏ੒ ࠷ॳͷάϦʔϯ
58. ςετΛॻ͘ describe JavaVersion do describe '.valid?' do subject { JavaVersion.valid?('JDK7u40') } it { should be_true } end end
59. ϓϩμΫτίʔυΛॻ͘ class JavaVersion def self.valid?(str) true end end ͱΓ͋͑ͣGBLF
    JU
60. ςετΛॻ͘ describe '.valid?' do context 'valid version string' do subject { JavaVersion.valid?('JDK7u40') } it { should be_true } end context 'invalid version string' do subject { JavaVersion.valid?('hoge') } it { should be_false } end end
61. ϓϩμΫτίʔυΛॻ͘ class JavaVersion def self.valid?(str) str =~ /^JDK\d+u\d+$/ end end
62. 1.ςετΛॻ͘ 2.REDΛݟΔ 3.ϓϩμΫτίʔυΛॻ͘ 4.GREENΛΈΔ ϦζϜ 3&%͔Β࢝ΊΑ
63. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • ࣍ͷόʔδϣϯΛௐ΂Δ 50%0Ϧετ DONE
64. •ϝιου໊͸ʁ •γάωνϟ͸Ͳ͏͢Δʁ •invalidͳจࣈྻͷͱ͖͸ʁ 5IJOL JOWBMJEͳঢ়ଶͳΦϒδΣΫτ͕࡞੒ Ͱ͖Δͱɺޙʑߟ͑Δ͜ͱ͕૿͑Δ͔ Βྫ֎ʹ͠Α͏
65. ςετΛॻ͘ describe '.parse' do context 'valid version string' do subject { JavaVersion.parse('JDK7u40') } it { should be } end context 'invalid version string' do it { expect { JavaVersion.parse('hoge') }.to raise_error } end end
66. ϓϩμΫτίʔυΛॻ͘ class JavaVersion ... def self.parse(str) raise "Invalid Version Format: #{str}" unless valid?(str) self.new end end
67. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ DONE DONE
68. •ϝιου໊͸ʁ •γάωνϟ͸Ͳ͏͢Δʁ •όʔδϣϯΛऔΓग़ͤͳ͍ͱ ·͍ͣͷͰ͸ʁ 5IJOL
69. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • ΦϒδΣΫτ͔ΒόʔδϣϯΛௐ΂Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ DONE DONE
70. •ϝιου໊͸ʁ •γάωνϟ͸Ͳ͏͢Δʁ 5IJOL
71. ςετΛॻ͘ describe '#family_number' do subject { JavaVersion.parse( 'JDK7u40' ).family_number } it { should == 7 } end
72. ϓϩμΫτίʔυΛॻ͘ class JavaVersion VERSION_FORMAT = /^JDK(\d)+u(\d+)$/ def self.valid?(str) str =~ VERSION_FORMAT end def self.parse(str) raise "Invalid Version Format: #{str}" unless valid?(str) self.new(str) end def initialize(version_string) @version_string = version_string end def family_number @version_string =~ VERSION_FORMAT $1.to_i end end
73. ςετΛॻ͘ describe '#update_number' do subject { JavaVersion.parse( 'JDK7u40' ).update_number } it { should == 40 } end
74. ϓϩμΫτίʔυΛॻ͘ class JavaVersion ... def update_number @version_string =~ VERSION_FORMAT $2.to_i end end
75. ϓϩμΫτίʔυΛॻ͘ class JavaVersion ... def update_number @version_string =~ VERSION_FORMAT $2.to_i end end
76. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • ΦϒδΣΫτ͔ΒόʔδϣϯΛௐ΂Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ DONE DONE DONE
77. Ұาཱͪࢭ·Δ class JavaVersion VERSION_FORMAT = /^JDK(\d)+u(\d+)$/ def self.valid?(str) str =~ VERSION_FORMAT end def self.parse(str) raise "Invalid Version Format: #{str}" unless valid?(str) self.new(str) end def initialize(version_string) @version_string = version_string end def family_number @version_string =~ VERSION_FORMAT $1.to_i end def update_number @version_string =~ VERSION_FORMAT $2.to_i end end Ϋϥεϝιου͕ ͔̎ͭʜ ॏෳʜ
78. ϦϑΝΫλϦϯά class JavaVersion VERSION_FORMAT = /^JDK(\d)+u(\d+)$/ attr_reader :family_number, :update_number class << self def valid?(str) str =~ VERSION_FORMAT end def parse(str) raise "Invalid Version Format: #{str}" unless valid?(str) self.new(str) end end def initialize(version_string) version_string =~ VERSION_FORMAT @family_number = $1.to_i @update_number = $2.to_i end end
79. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • ΦϒδΣΫτ͔ΒόʔδϣϯΛௐ΂Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ DONE DONE DONE
80. •ϝιου໊͸ʁ •γάωνϟ͸Ͳ͏͢Δʁ •RubyͳΒԋࢉࢠΛΦʔόʔϥ Πυ͢Δͷ͕Αͦ͞͏ 5IJOL
81. ςετΛॻ͘ describe '#<=>' do let(:v7u40) { JavaVersion.parse('JDK7u40') } let(:v7u51) { JavaVersion.parse('JDK7u51') } let(:v8u0) { JavaVersion.parse('JDK8u0') } context 'compare update number' do it { v7u40.should be < v7u51 } end context 'compare family number' do it { v7u40.should be < v8u0 } end end
82. ϓϩμΫτίʔυΛॻ͘ class JavaVersion include Comparable ... def <=>(target) if (self.family_number <=> target.family_number).zero? self.update_number <=> target.update_number else self.family_number <=> target.family_number end end end
83. • จࣈྻ͕ଥ౰͔Ͳ͏͔ௐ΂Δ • จࣈྻΛύʔεͯ͠ΦϒδΣΫτΛ࡞Δ • ΦϒδΣΫτ͔ΒόʔδϣϯΛௐ΂Δ • 2ͭͷόʔδϣϯΛൺֱ͢Δ • (࣍ͷόʔδϣϯΛௐ΂Δ) 50%0Ϧετ DONE DONE DONE DONE
84. 1.ςετΛॻ͘ 2.REDΛݟΔ 3.ϓϩμΫτίʔυΛॻ͘ 4.GREENΛΈΔ ϦζϜ 3&%͔Β࢝ΊΑ
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