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テストファーストな設計を求めて
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ippachi
October 11, 2019
Programming
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テストファーストな設計を求めて
ippachi
October 11, 2019
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Transcript
ςετϑΝʔετͳ ઃܭΛٻΊͯ @ippachi1218
ࣗݾհ • Rubyist • Web programmer • ৽ଔ̍ • Mockist
TDD • @ippachi1218
ςετͷ ʢςετΤϯδχΞͷਓͷςετʣ ͱ͔Ͱ͖ͳ͍Α…
–connpassΠϕϯτ֓ཁ “ ࠓճςετͱ͍ͬͯɺಛʹ੍ݶͳ͠Ͱϊϯ δϟϯϧͰ͓Λ͓ئ͍͍ͯ͠·͢ɻ”
ςετ ʢϓϩάϥϚ͕։ൃʹ༻͍Δํͷςετʣ ͷΛ͠·͢ʂ
ϢχοτςετدΓ͔
ςετϑΝʔετ ͳઃܭΛٻΊͯ
ςετॻ͘ͷਏ͍…
ςετϑΝʔετͳͷͬͯʁ ґଘ͕͍ͷ
ґଘʁ
None
–σδλϧେࣙઘ “ ଞͷͷʹͨΑཱͬͯɾଘࡏ͢Δ͜ͱɻ”
None
ґଘ = ͍ͬͯΔ͜ͱ
None
ΫϥεɺϝιουΛ ࢀর͢Δ ͦͷΫϥεɺϝιουΛ ͍ͬͯΔ ||
ྫ
େࣄͳϩδοΫ̍ def daiji1 େࣄͳॲཧ… daiji_na_data = PgManager.where(‘status = 10’) .order_by(‘rank’)
.limit_by(1) େࣄͳॲཧ… end
daiji1͕͍ؔͬͯΔ͜ͱ
• PgManagerϞδϡʔϧ͕͋Δ͜ͱ • PgManagerϞδϡʔϧ͕whereϝιουΛ͍࣋ͬͯΔ͜ͱ • whereϝιου͕order_byϝιουΛ࣋ͭΦϒδΣΫτΛฦ͢ ͜ͱ • order_byϝιου͕limit_byϝιουΛ࣋ͭΦϒδΣΫτΛฦ ͢͜ͱ
• ʢσʔλͷอଘઌ͕σʔλϕʔεͰ͋Δ͜ͱʣ • ʢσʔλϕʔε͕postgresqlͰ͋Δ͜ͱʣ
ґଘ = ͍ͬͯΔ͜ͱ
ͭ·Γ…
• PgManagerϞδϡʔϧ͕͋Δ͜ͱ • PgManagerϞδϡʔϧ͕whereϝιουΛ͍࣋ͬͯΔ͜ͱ • whereϝιου͕order_byϝιουΛ࣋ͭΦϒδΣΫτΛฦ͢ ͜ͱ • order_byϝιου͕limit_byϝιουΛ࣋ͭΦϒδΣΫτΛฦ ͢͜ͱ
• ʢσʔλͷอଘઌ͕σʔλϕʔεͰ͋Δ͜ͱʣ • ʢσʔλϕʔε͕postgresqlͰ͋Δ͜ͱʣ ͜Ε͚ͩͷͷʹґଘ͍ͯ͠Δ
͏Ұྫ Α͋͘Γͦ͏ͳ͜ͱ
େࣄͳϩδοΫ̎ def daiji2 େࣄͳॲཧ… daiji_na_data = Aws::S3.buckets[‘bucket’] .objects[‘key’] େࣄͳॲཧ… end
daiji2͕͍ؔͬͯΔ͜ͱ
• Aws::S3Ϟδϡʔϧ͕͋Δ͜ͱ • Aws::S3Ϟδϡʔϧ͕bucketsϝιουΛ͍࣋ͬͯΔ͜ͱ • bucketsϝιου͕objectsϝιουΛ࣋ͭΦϒδΣΫτΛฦ͢ ͜ͱ • ʢσʔλͷอଘઌ͕S3Ͱ͋Δ͜ͱʣ •
ʢΫϥυαʔϏε͕AwsͰ͋Δ͜ͱʣ
ґଘ = ͍ͬͯΔ͜ͱ
• Aws::S3Ϟδϡʔϧ͕͋Δ͜ͱ • Aws::S3Ϟδϡʔϧ͕bucketsϝιουΛ͍࣋ͬͯΔ͜ͱ • bucketsϝιου͕objectsϝιουΛ࣋ͭΦϒδΣΫτΛฦ͢ ͜ͱ • ʢσʔλͷอଘઌ͕S3Ͱ͋Δ͜ͱʣ •
ʢΫϥυαʔϏε͕AwsͰ͋Δ͜ͱʣ ͜Ε͚ͩͷͷʹґଘ͍ͯ͠Δ
େࣄͳͷͱ͖ʹ ଟ͘ͷ۩ʹґଘ͍ͯ͠Δ
ґଘ͢Δͱґଘઌͷ ӨڹΛड͚Δ͜ͱʹͳΔ
None
͜ΕͷϢχοτςετ Ͳ͏ͳΔ͔ʁ
Ϣχοτ = ଞͱͷґଘ͕ͳ͍
େࣄͳϩδοΫ̍ def daiji େࣄͳॲཧ… daiji_na_data = PgManager.where(‘status = 10’) .order_by(‘rank’)
.limit_by(1) େࣄͳॲཧ… end
• PgManagerσʔλϕʔεΞΫηε͔ͩΒελϒʹ ͠ͳ͖Ό… • ࿈తʹϝιουݺΜͰͯελϒʹ͢ΔͷΊΜͲ͘͞ ͦ͏ • ͦͦ͜͜Λελϒʹͨ͠Βσʔλऔಘͷਖ਼͠͞ ୭͕…
ͳΜͱ͔ Ϣχοτςετॻ͚ͨʂ
ߜΓࠐΈͷ݅Ճ
େࣄͳϩδοΫ̍ def daiji େࣄͳॲཧ… daiji_na_data = PgManager.where(‘status = 10’) .where(‘id
> 10’) .order_by(‘rank’) .limit_by(1) େࣄͳॲཧ… end
ຊ࣭Ͱͳ͍ͷʹ daijiؔͷςετམͪΔ
Fragile Test খ͞ͳมߋͰ͔ΜͨΜʹςετ͕མͪΔ ੬͍ςετ
None
Fragile Test͕ྔ࢈͞ΕΔͱ…
None
ςετ͕ෛ࠴ʹͳΓ ͳ͍΄͏͕Ϛγͳঢ়ଶʹ ؕΔ͜ͱ
ͦͯ͠୭ ϝϯςͰ͖ͳ͘ͳͬͨ
͡Ό͋Ͳ͏͢Ε͍͍ͷʁ
Clean Architecture
EBJKJؔ 1H.BOBHFS
ґଘͷํ େࣄͰͳ͍ͷ ↓ ͦͦ͜͜େࣄͳͷ ↓ େࣄͳͷ daijiؔ PgManager
େࣄͳϩδοΫ̍ def daiji(repository) େࣄͳॲཧ… daiji_na_data = repository.get_daiji_na_data େࣄͳॲཧ… end
ґଘͷํ େࣄͰͳ͍ͷ ↓ ͦͦ͜͜େࣄͳͷ ↓ େࣄͳͷ daijiؔ PgManager
• PgManagerϞδϡʔϧ͕͋Δ͜ͱ • PgManagerϞδϡʔϧ͕whereϝιουΛ͍࣋ͬͯΔ͜ͱ • whereϝιου͕order_byϝιουΛ࣋ͭΦϒδΣΫτΛฦ͢ ͜ͱ • order_byϝιου͕limit_byϝιουΛ࣋ͭΦϒδΣΫτΛฦ ͢͜ͱ
• ʢσʔλͷอଘઌ͕σʔλϕʔεͰ͋Δ͜ͱʣ • ʢσʔλϕʔε͕postgresqlͰ͋Δ͜ͱʣ ͜Ε͚ͩͷͷʹґଘ͍ͯ͠Δ ͜Ε͕
• repository͕get_daiji_na_dataϝιουΛ͍࣋ͬͯΔ͜ͱ ΊͪΌΊͪΌݮͬͨʂ ͜͏
• ςετget_daiji_na_dataΛελϒ ͢Δ͚ͩͰ͍͍ • σʔλऔಘͷਖ਼͠͞ get_daiji_na_dataΛςετ͢Εྑ͍
ຊ࣭ͷ෦ͷ ςετ͕ॻ͖͘͢ͳΔ
ผʹΫϦʔϯΞʔΩςΫνϟ ͱ͔ݴΘͳͯ͘Ͱ͖Δ
̍ਓͰͯ͠ҙຯ͕ͳ͍
໊લ͕͋Δ͜ͱ͕ॏཁ
Web͡Όͳͯ͘ େମద༻Ͱ͖ΔΑ
·ͱΊ • ςετϑΝʔετʹ͢Δʹ͍ͬͯΔ͜ͱΛ ੍ޚ͢Δ • Clean ArchitectureΛֶ͍ͬͯΔ͜ͱ ͷ੍ޚΛֶΔ
Clean ArchitectureͰ ςετϑΝʔετͳ ίʔυΛॻ͜͏ʂ