DESAMIS Go Training Season 1 Day 10

(Pݚमୈظ %": :VUBLB,BUP   3% %&4".*4 %&4".*4ࣾ಺ݚम

ݚमܭը ճ ೔࣍ ༧ఆ λΠτϧ ୈճ Ր (Pͷجຊ
ୈճ Ր ؀ڥߏஙͱ(JU (JU)VCͷجຊ ୈճ Ր جຊߏจ ୈճ Ր ߏ଄ମɺεϥΠεɺϚοϓ ୈճ Ր ඪ४ϥΠϒϥϦ͸΍Ί͙Γ ୈճ Ր ϞδϡʔϧγεςϜͱ֎෦ϥΠϒϥϦ ୈճ Ր )FSPLV(Pೖ໳ ୈճ Ր "84-BNCEB(Pೖ໳ ୈճ Ր ฒߦॲཧϓϩάϥϛϯά ୈճ Ր ୯ମςετٕ๏ ୈճ Ր σʔλϕʔεΞΫηε ୈճ Ր 'ZOFʹΑΔ(6*ΞϓϦέʔγϣϯ։ൃ ୈճ Ր ࣾ಺(PϓϩδΣΫτͷίʔυղઆ

˞ લճͷ13ͷ   ղઆλΠϜ

ຊ೔ͷΰʔϧ w 🚩ΰʔϧ w UFTUJOHඪ४ϥΠϒϥϦͷ༷ʑͳػೳΛֶͿ w ςʔϒϧۦಈςετ౳ͷύλʔϯΛशಘ͢Δ w ❌ΰʔϧͰ͸ͳ͍ w
୯ମςετͷྖҬΛ௒͑Δ༷ʑͳςετͷ࣮ݱ

ςετͷجຊ

Ͱ͖Δ͜ͱ w ςετؔ਺ͷ࣮૷ͱ࣮ߦ w ϕϯνϚʔΫؔ਺ͷ࣮૷ͱ࣮ߦ w ίʔυྫؔ਺ͷ࣮૷ͱ࣮ߦɺHPEPD΁ͷܝࡌ w ΧόϨοδͷܭଌ
HPUFTUDPWFSΦϓγϣϯ w ϓϩϑΝΠϦϯά HPUFTUNFNQSP fi MF౳ͷΦϓγϣϯ w σʔλڝ߹ͷݕग़ HPUFTUSBDFΦϓγϣϯ w ͳͲͳͲʜ

໨ࢦ͍ͯ͠Δઃܭ w ςετ͸શͯ(Pͷجຊߏจ if, for, struct౳ Ͱॻ͘ w ςετͷͨΊͷ৽ͨͳπʔϧ΍ه๏Λඞཁͱ͠ͳ͍
w Ξαʔγϣϯ΍ϔϧύʔؔ਺͸ͳ͍ w جຊʹཱͪฦΓɺྑ͍ςετɺྑ͍ࣦഊϝοηʔδΛجຊ ߏจͰ͔ͬ͠Γॻ͘ͷ͕େࣄ (P'"2   l8IZEPFT(POPUIBWFBTTFSUJPOT lٴͼ   l8IFSFJTNZGBWPSJUFIFMQFSGVODUJPOGPSUFTUJOH zΑΓ IUUQTHPMBOHPSHEPDGBR

ϧʔϧ ςετίʔυ͸ʮ@UFTUHPʯͰऴΘΔϑΝΠϧʹ࣮ ૷͢Δ ςετͷ࣮ߦ͸ʮHPUFTUʯαϒίϚϯυΛ༻͍Δ ςετίʔυ͸ී௨ʹϏϧυ HPCVJME
͢Δࡍʹ͸ί ϯύΠϧ͞Εͳ͍ HPUFTUͰ࣮ߦͯ͠΋Β͍͍ͨؔ਺͸໋໊نଇͱγ άχνϟͷنఆʹै͏ඞཁ͕͋Δ

ςετؔ਺

࡞Γํ w ҎԼͷϧʔϧʹैͬͨؔ਺Λ࣮૷͢ΔͱɺHP UFTUͰؔ਺Λ࣮ߦͯ݁͠ՌΛϨϙʔτͯ͘͠ΕΔ w UFTUJOHύοέʔδΛΠϯϙʔτ w ࣍ͷؔ਺γάχνϟΛ࣋ͭ  
func TestName(t *testing.T) { … } w Name͸େจࣈͰ࢝·Δςετͷ໊લ

΍ͬͯΈΑ͏ 74$PEFΛىಈ͠ݚमϦϙδτϦΛ։͖·͢ Ϣʔβʔ໊ϑΥϧμҎԼʹʮEBZUFTUʯϑΥϧμΛ࡞੒͠ɺͦͷதʹ ҎԼͷ಺༰ͰʮUIJHPʯͱʮUIJ@UFTUHPʯΛ࡞੒͠·͢ package th
i // THI ͸Թ౓ (℃) ͱ࣪౓ (%) ͔Β THI (ෆշࢦ਺) ܭࢉ͠·͢ɻ func THI(temperature, humidity float64) float64 { return (0.8 * temperature) + humidity*(temperature-14.4)/100 + 46. 4 } package th i import "testing " func TestTHI(t *testing.T) { temperature, humidity, expected := 25.2, 65.0, 73. 5 actual := THI(temperature, humidity ) if expected != actual { t.Errorf("THI(%v, %v) = %v (ظ଴஋: %v)", temperature, humidity, actual, expected ) } } t h i . g o t h i _ t e s t . g o

΍ͬͯΈΑ͏ --- FAIL: TestTHI (0.00s) thi_test.go:9: THI(25.2, 65)
= 73.58 (ظ଴஋: 73.5) FAIL exit status 1 FAIL github.com/u-motion/go-training-1/mikan/day10-test1 0.137s ʮUIJHPʯΛӈΫϦοΫͯ͠ϝχϡʔ͔Β౷߹λʔϛφϧΛ։͖ɺ   ʮHPUFTUʯʻ&OUFSʼͱೖྗ͍ͯͩ͘͠͞ ʮUIJ@UFTUHPʯͷexpectedͷ஋Λʹमਖ਼͠ɺ࠶࣮ߦ͍ͯͩ͘͠͞ PASS ok github.com/u-motion/go-training-1/mikan/day10-test1 0.284s ੒ޭྫ

ςʔϒϧۦಈςετ w Α͘࢖ΘΕΔύλʔϯςʔϒϧۦಈ UBCMFESJWFO ςετ˞ w ೖྗɾظ଴஋ͷ૊Έ߹ΘͤΛෳ਺༻ҙͯ͠ϧʔϓͰճ͢ελΠϧ ˞ڭՊॻͰ͸  
ʮදۦಈʯͱ   ༁͞Ε͍ͯΔ func TestTHI(t *testing.T) { var tests = []struct { temperature float6 4 humidity float6 4 expected float6 4 } { {25.2, 65.0, 73.58} , {-33.0, 100.0, -27.4} , {40, 0.0, 78.4} , } for i, test := range tests { actual := THI(test.temperature, test.humidity ) if test.expected != actual { t.Errorf("#%d: THI(%v, %v) = %v (ظ଴஋: %v)", i+1 , test.temperature, test.humidity, actual, test.expected ) } } } ςʔϒϧͷ֤ߦͷఆٛ lςʔϒϧz ϧʔϓͰ֤ߦΛճ͢

ΧόϨοδ

ΧόϨοδܭଌ w ςετίʔυ͕ຊମίʔυΛͲͷఔ౓໢ཏ͍ͯ͠Δ͔Λܭଌ͢ Δ͜ͱ͕Ͱ͖Δ w ߦΧόϨοδɺ໋ྩΧόϨοδ $ ɺ෼ذΧόϨοδ $
ɺ ৚݅ΧόϨοδ $ ͳͲͷࢦඪ͕͋Δ w HPUFTUαϒίϚϯυʹDPWFSΦϓγϣϯΛ෇͚ΔͱΧόϨο δ $ Λܭଌ͢Δ w 74$PEFͰ໢ཏ͍ͯ͠ΔՕॴɾ͍ͯ͠ͳ͍ՕॴΛදࣔͨ͠Γɺ ΧόϨοδ݁ՌΛϑΝΠϧʹग़ྗͯ͠πʔϧͰӾཡ͢Δ͜ͱ΋ Ͱ͖Δ

΍ͬͯΈΑ͏ ͖͞΄ͲͷUIJHPʹҎԼͷ෼ذΛ௥Ճ͠·͢     ౷߹λʔϛφϧͰʮHPUFTUDPWFSʯʻ&OUFSʼΛೖྗ͠ɺ   ΧόϨοδΛ֬ೝ͠·͢
74$PEFͷϝχϡʔͰ<දࣔ><ίϚϯυύϨοτʜ>Λબ୒ɺೖྗ ཝʹʮHPUFTUDPWFSʯ (P5PHHMF5FTU$PWFSBHFJO$VSSFOU 1BDLBHF ʻ&OUFSʼΛೖྗ͠·͢ ࠶࣮ߦͰݩʹ໭Γ·͢ if humidity < 0 || humidity > 100 { return math.NaN() } ˞ศٓతʹ/B/Λ࢖༻ɺ   FSSPSΛฦ͢΄͏͕ϕλʔ ྘͕໢ཏͨ͠Օॴɺ੺͕໢ཏ͍ͯ͠ͳ͍Օॴ

HPUPPMDPWFS ౷߹λʔϛφϧͰʮHPUFTUDPWFSQSP fi MFDPVUʯʻ&OUFSʼ   ʮHPUPPMDPWFSIUNMDPVUʯʻ&OUFSʼΛೖྗ͠·͢ ϒϥ΢β্ཱ͕͕ͪΓ)5.-ϑΝΠϧ͕։͔ΕΔͷͰɺ݁Ռ
Λ֬ೝ͠·͢

ϕϯνϚʔΫؔ਺

ϕϯνϚʔΫؔ਺ w ҎԼͷϧʔϧʹैͬͨؔ਺Λ࣮૷͢ΔͱɺʮHPUFTU CFODIʯͰؔ਺Λ࣮ߦͯ݁͠ՌΛϨϙʔτͯ͘͠Ε Δ w UFTUJOHύοέʔδΛΠϯϙʔτ w ࣍ͷؔ਺γάχνϟΛ࣋ͭ
  func BenchmarkName(b *testing.B) { … } w Name͸େจࣈͰ࢝·ΔϕϯνϚʔΫͷ໊લ

࣮ߦྫ func BenchmarkTHI(b *testing.B) { for i := 0;
i < b.N; i++ { THI(10.0, 50.0 ) } } func BenchmarkTxH(b *testing.B) { for i := 0; i < b.N; i++ { TxH(10.0, 50.0 ) } } Թ౓º࣪౓ ۭؾ೤ྔࢦ਺ Λฦ͚ͩ͢ͷ؆୯ͳؔ਺ ઌ΄Ͳ࡞ͬͨ5)* ؔ਺ % go test -bench . goos: darwin goarch: amd64 pkg: github.com/u-motion/go-training-1/mikan/day10-thi cpu: Intel(R) Core(TM) m5-6Y54 CPU @ 1.10GHz BenchmarkTHI-4 1000000000 0.3862 ns/op BenchmarkTxH-4 1000000000 0.3776 ns/op PASS ok github.com/u-motion/go-training-1/mikan/day10-thi 0.999s

࣮ߦྫ func BenchmarkTHI(b *testing.B) { for i := 0;
i < b.N; i++ { THI(10.0, 50.0 ) } } func BenchmarkTxH(b *testing.B) { for i := 0; i < b.N; i++ { TxH(10.0, 50.0 ) } } Թ౓º࣪౓ ۭؾ೤ྔࢦ਺ Λฦ͚ͩ͢ͷ؆୯ͳؔ਺ ઌ΄Ͳ࡞ͬͨ5)* ؔ਺ % go test -bench . goos: darwin goarch: amd64 pkg: github.com/u-motion/go-training-1/mikan/day10-thi cpu: Intel(R) Core(TM) m5-6Y54 CPU @ 1.10GHz BenchmarkTHI-4 1000000000 0.3862 ns/op BenchmarkTxH-4 1000000000 0.3776 ns/op PASS ok github.com/u-motion/go-training-1/mikan/day10-thi 0.999s ͸(0."9130$4ͷ஋ ԯճ࣮ߦͨ͠ ҆ఆͨ͠ܭଌ ʹඞཁͳ਺ΛࣗಈͰਪఆ͍ͯ͠Δ ଌఆ݁Ռ ฏۉ஋ ܭࢉ͕୯७ͳ5Y) ͷ΄͏͕ͪΐͬͱ͚ͩ଎͍ʂ

ίʔυྫؔ਺

ίʔυྫؔ਺ w ҎԼͷϧʔϧʹैͬͨؔ਺Λ࣮૷͢ΔͱɺʮHPUFTUʯͰؔ਺Λ࣮ߦ͠ ͯ݁ՌΛϨϙʔτͯ͘͠ΕΔ w ࣍ͷؔ਺γάχνϟͱίϝϯτΛ࣋ͭ   func ExampleName()
{  (ඪ४ग़ྗ͕͋Δίʔυ)  // Output:  // (ඪ४ग़ྗͷظ଴͢Δ݁Ռ)  } w Name͸େจࣈͰ࢝·Δίʔυྫͷ໊લ w هड़ͨ͠ίʔυ͸HPEPDʹ΋දࣔ͞ΕΔ   ˞HPEPDʹࡌͤΔ͜ͱ͚͕ͩओͳ໨తͳΒඪ४ग़ྗ͸ͳͯ͘΋ྑ͍

΍ͬͯΈΑ͏ ͖͞΄ͲͷUIJ@UFTUHPʹҎԼͷίʔυΛ௥Ճ͠·͢       ౷߹λʔϛφϧͰʮHPUFTUʯʻ&OUFSʼΛೖྗ͠ɺࣦഊ͢Δͷ Λ֬ೝ͠·͢
Λʹमਖ਼͠ɺ΋͏Ұ౓ςετΛ࣮ߦͯ͠੒ޭʹͳ Δ͜ͱΛ֬ೝ͠·͢ func ExampleTHI() { fmt.Println(THI(20.5, 50.0) ) // Output : // 65. 8 } 見た目は文字通りコード例だけど、これも立派なテストコード！  コード例で触った部分はカバレッジ計測にも反映されます

HPEPDͷ֬ೝ ҎԼͷίϚϯυͰHPEPDͱ͍͏ίϚϯυϥΠϯπʔϧΛಋೖ͠·͢   go install golang.org/x/tools/cmd/godoc@latest    (࣮ߦόΠφϦ͕
<ϗʔϜσΟϨΫτϦ>/go/bin/ ҎԼʹ֨ೲ͞Ε·͢) ౷߹λʔϛφϧͰʮ~\go\bin\godocʯʻ5BCʼʻ&OUFSʼΛ࣮ߦ͠·͢˞ ϒϥ΢βͰIUUQMPDBMIPTUʹΞΫηε͠·͢ ࣗ෼͕࡞ͬͨίʔυͷυΩϡϝϯςʔγϣϯΛ୳͠·͢ 5IJSE1BSUZηΫγϣϯ   㸉HJUIVCDPN   ɹ㸉VNPUJPO ɹɹ㸉HPUSBJOJOH ɹɹɹ㸉Ϣʔβʔ໊ ɹɹɹɹ㸉EBZUFTU ˞$PNNBOE1SPNQUͷ৔߹   ɹ%USERPROFILE%\go\bin\godoc

6OPSEFSFEPVUQVU w ॱং͕ෆఆͳෳ਺ߦͷग़ྗ΋&YBNQMFؔ਺Ͱऔ Γѻ͏͜ͱ͕Մೳ w ॱং͕ෆఆͳNBQ͕ඞཁͳςετͰศར func ExampleTHI_map() {
for humidity := range map[float64]bool{-1: true, 50: true, 101: true} { fmt.Println(THI(20.5, humidity) ) } // Unordered output : // 65.8 5 // Na N // Na N } NBQ͔ΒͷऔΓग़͠ॱং͸ϥϯμϜ ॱংΛม͑ͯ΋ύε͢Δ l6OPSEFSFEPVUQVUzͱ͢Δ

ͦͷଞͷػೳ

HPUFTUͷ௥Ճػೳ w ϓϩϑΝΠϦϯά DQVQSP fi MF CMPDLQSP fi MF
NFNQSP fi MF w $16ϓϩϑΝΠϧɺώʔϓϓϩϑΝΠϧɺ଴ͪϓϩϑΝΠϧ Λه࿥ɾදࣔՄೳ ڭՊॻઅΛࢀর w ϨʔεσΟςΫλʔ SBDF w ෳ਺ͷHPSPVUJOF͕ಉ࣌ʹҰͭͷ஋ΛಡΈॻ͖ গͳ͘ͱ΋ ͕ͭॻ͖ࠐΈ ͍ͯ͠Δ৔໘ ഉଞ੍ޚ࿙Ε Λݕ஌ͯ͠Τϥʔ ʹམͱͯ͘͠ΕΔ w ࣮ࡍʹൃੜ͠ͳ͍ͱݕ஌Ͱ͖ͳ͍ͷͰɺ໷௨͠ಉ͡ςετΛ ܁Γฦ࣮͠ߦͤ͞Δ౳ͷӡ༻ͱ૊Έ߹ΘͤΔͷ͕͓קΊ

UFTUJOHͷ௥Ճػೳ w ςετॲཧ༻ͷNBJOؔ਺ UFTUJOH. ˞(PͰಋೖ w ςετؔ਺͕૸Γग़͢લʹNBJOHPSPVUJOFͰ૸Β͓͖ͤͯ ͍ͨॲཧ΍ΫϦʔϯΞοϓ͍ͨ͠ॲཧ͕͋Δ৔߹ʹར༻ w
αϒςετɾαϒϕϯνϚʔΫ U3VO C3VO ˞(PͰಋೖ w ϧʔϓͷதͳͲ͔Β৽ͨͳςετ΍ϕϯνϚʔΫΛ࣮ߦͰ͖Δ w ςʔϒϧۦಈܕϕϯνϚʔΫ΍֊૚ςετͳͲෳࡶͳ͜ͱΛ͠ ͍ͨͱ͖ͷΈ࢖͏ 詳しくは t e s t i n g の g o d o c にある E x a m p l e コードをチェック！

࿅श

࿅श໰୊ w ࿅श՝୊<ϑΥϧμ໊EBZUFTU> w ΧόϨοδ͕ʹͳΔΑ͏ͳςʔϒϧۦ ಈςετͷςετؔ਺Λ௥Ճ͍ͯͩ͘͠͞

ʙղઆλΠϜʙ

͕࣌ؒ༨ͬͨΒ w ࿅श໰୊ 1 <ϑΥϧμ໊EBZDIFY> w ·ͣ͸1ʹ͋ΔຊମίʔυIsPalindrome()ͱ 1ʹ͋Δςετίʔυͷࣸܦ͔Β w ࿅श໰୊
1 <ϑΥϧμ໊EBZDIFY> w ͷίʔυΛίϐʔ͔ͯ͠Β࢝ΊΔͱΑ͍ w ࿅श໰୊ 1 <ϑΥϧμ໊EBZDIFY> w ·ͣ͸1ͷ5FTU4QMJU ͷࣸܦ͔Β

ίʔυΛॻ͖ऴ͑ͨΒ w ʮϢʔβʔ໊QSBDUJDFʯϒϥϯνͰ࡞ۀ͍ͯ͠Δ͜ͱΛ֬ೝ͍ͯͩ͘͠͞ w 74$PEFͷҰ൪ࠨԼʹදࣔ͞Ε͍ͯ·͢ w มߋΛεςʔδ͠ɺίϛοτ͍ͯͩ͘͠͞ w 74$PEFͷࠨϝχϡʔͷʮιʔε؅ཧʯ͔Βૢ࡞ w
ίʔυΛ(JU)VCʹϓογϡ͍ͯͩ͘͠͞ w 74$PEFͷҰ൪ࠨԼͷϒϥϯν໊ͷ͙͢ӈʹ͋ΔΞΠίϯ͔Βૢ࡞ ্ਤ w ϓϧϦΫΤετΛ࡞੒͍ͯͩ͘͠͞ w ʮιʔε؅ཧʯͷ্෦ʹΞΠίϯ͕͋Γ·͢

࣍ճ༧ࠂ w ࣍ճ͸ʮσʔλϕʔεΞΫηεʯͰ͢ w ෼͔Βͳ͔ͬͨͱ͜Ζ΍࣭໰ͳͲ͸ɺࣾ಺ 4MBDLHPQIFSTνϟϯωϧʹ౤ߘ͍ͩ͘͞ w ຊ೔ͷ಺༰ΛΑΓਂ͘ཧղ͍ͨ͠ํ͸ɺڭՊॻ ͷୈষΛಡΜͰΈ͍ͯͩ͘͞

DESAMIS Go Training Season 1 Day 10

DESAMIS Go Training Season 1 Day 10

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