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(Pݚमୈظ
%":
:VUBLB,BUP
3%
%&4".*4
%&4".*4ࣾݚम
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ݚमܭը
ճ ࣍ ༧ఆ
λΠτϧ
ୈճ Ր
(Pͷجຊ
ୈճ Ր
ڥߏஙͱ(JU
(JU)VCͷجຊ
ୈճ Ր
جຊߏจ
ୈճ Ր
ߏମɺεϥΠεɺϚοϓ
ୈճ Ր
ඪ४ϥΠϒϥϦΊ͙Γ
ୈ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
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˞
લճͷ13ͷ
ղઆλΠϜ
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ຊͷΰʔϧ
w 🚩ΰʔϧ
w UFTUJOHඪ४ϥΠϒϥϦͷ༷ʑͳػೳΛֶͿ
w ςʔϒϧۦಈςετͷύλʔϯΛशಘ͢Δ
w ❌ΰʔϧͰͳ͍
w ୯ମςετͷྖҬΛ͑Δ༷ʑͳςετͷ࣮ݱ
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ςετͷجຊ
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Ͱ͖Δ͜ͱ
w ςετؔͷ࣮ͱ࣮ߦ
w ϕϯνϚʔΫؔͷ࣮ͱ࣮ߦ
w ίʔυྫؔͷ࣮ͱ࣮ߦɺHPEPDͷܝࡌ
w ΧόϨοδͷܭଌ HPUFTUDPWFSΦϓγϣϯ
w ϓϩϑΝΠϦϯά HPUFTUNFNQSP
fi
MFͷΦϓγϣϯ
w σʔλڝ߹ͷݕग़ HPUFTUSBDFΦϓγϣϯ
w ͳͲͳͲʜ
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ࢦ͍ͯ͠Δઃܭ
w ςετશͯ(Pͷجຊߏจ if, for, struct
Ͱॻ͘
w ςετͷͨΊͷ৽ͨͳπʔϧه๏Λඞཁͱ͠ͳ͍
w Ξαʔγϣϯϔϧύʔؔͳ͍
w جຊʹཱͪฦΓɺྑ͍ςετɺྑ͍ࣦഊϝοηʔδΛجຊ
ߏจͰ͔ͬ͠Γॻ͘ͷ͕େࣄ
(P'"2
l8IZEPFT(POPUIBWFBTTFSUJPOT lٴͼ
l8IFSFJTNZGBWPSJUFIFMQFSGVODUJPOGPSUFTUJOH zΑΓ
IUUQTHPMBOHPSHEPDGBR
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ϧʔϧ
ςετίʔυʮ@UFTUHPʯͰऴΘΔϑΝΠϧʹ࣮
͢Δ
ςετͷ࣮ߦʮHPUFTUʯαϒίϚϯυΛ༻͍Δ
ςετίʔυී௨ʹϏϧυ HPCVJME
͢Δࡍʹί
ϯύΠϧ͞Εͳ͍
HPUFTUͰ࣮ߦͯ͠Β໋໊͍͍ͨؔنଇͱγ
άχνϟͷنఆʹै͏ඞཁ͕͋Δ
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ςετؔ
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࡞Γํ
w ҎԼͷϧʔϧʹैͬͨؔΛ࣮͢ΔͱɺHP
UFTUͰؔΛ࣮ߦͯ݁͠ՌΛϨϙʔτͯ͘͠ΕΔ
w UFTUJOHύοέʔδΛΠϯϙʔτ
w ࣍ͷؔγάχνϟΛ࣋ͭ
func TestName(t *testing.T) { … }
w NameେจࣈͰ࢝·Δςετͷ໊લ
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ͬͯΈΑ͏
74$PEFΛىಈ͠ݚमϦϙδτϦΛ։͖·͢
Ϣʔβʔ໊ϑΥϧμҎԼʹʮEBZUFTUʯϑΥϧμΛ࡞͠ɺͦͷதʹ
ҎԼͷ༰ͰʮUIJHPʯͱʮUIJ@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
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ͬͯ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@UFTUHPʯͷexpectedͷΛʹमਖ਼͠ɺ࠶࣮ߦ͍ͯͩ͘͠͞
PASS
ok github.com/u-motion/go-training-1/mikan/day10-test1 0.284s
ޭྫ
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ςʔϒϧۦಈςετ
w Α͘ΘΕΔύλʔϯςʔϒϧۦಈ UBCMFESJWFO
ςετ˞
w ೖྗɾظͷΈ߹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
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ΧόϨοδ
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ΧόϨοδܭଌ
w ςετίʔυ͕ຊମίʔυΛͲͷఔཏ͍ͯ͠Δ͔Λܭଌ͢
Δ͜ͱ͕Ͱ͖Δ
w ߦΧόϨοδɺ໋ྩΧόϨοδ $
ɺذΧόϨοδ $
ɺ
݅ΧόϨοδ $
ͳͲͷࢦඪ͕͋Δ
w HPUFTUαϒίϚϯυʹDPWFSΦϓγϣϯΛ͚ΔͱΧόϨο
δ $
Λܭଌ͢Δ
w 74$PEFͰཏ͍ͯ͠ΔՕॴɾ͍ͯ͠ͳ͍ՕॴΛදࣔͨ͠Γɺ
ΧόϨοδ݁ՌΛϑΝΠϧʹग़ྗͯ͠πʔϧͰӾཡ͢Δ͜ͱ
Ͱ͖Δ
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ͬͯΈΑ͏
͖͞΄ͲͷUIJHPʹҎԼͷذΛՃ͠·͢
౷߹λʔϛφϧͰʮHPUFTUDPWFSʯʻ&OUFSʼΛೖྗ͠ɺ
ΧόϨοδΛ֬ೝ͠·͢
74$PEFͷϝχϡʔͰ<දࣔ> <ίϚϯυύϨοτʜ>Λબɺೖྗ
ཝʹʮ HPUFTUDPWFSʯ (P5PHHMF5FTU$PWFSBHFJO$VSSFOU
1BDLBHF
ʻ&OUFSʼΛೖྗ͠·͢ ࠶࣮ߦͰݩʹΓ·͢
if humidity < 0 || humidity > 100
{
return math.NaN()
}
˞ศٓతʹ/B/Λ༻ɺ
FSSPSΛฦ͢΄͏͕ϕλʔ
͕ཏͨ͠Օॴɺ͕ཏ͍ͯ͠ͳ͍Օॴ
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HPUPPMDPWFS
౷߹λʔϛφϧͰʮHPUFTUDPWFSQSP
fi
MFDPVUʯʻ&OUFSʼ
ʮHPUPPMDPWFSIUNMDPVUʯʻ&OUFSʼΛೖྗ͠·͢
ϒϥβ্ཱ͕͕ͪΓ)5.-ϑΝΠϧ͕։͔ΕΔͷͰɺ݁Ռ
Λ֬ೝ͠·͢
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ϕϯνϚʔΫؔ
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ϕϯνϚʔΫؔ
w ҎԼͷϧʔϧʹैͬͨؔΛ࣮͢ΔͱɺʮHPUFTU
CFODIʯͰؔΛ࣮ߦͯ݁͠ՌΛϨϙʔτͯ͘͠Ε
Δ
w UFTUJOHύοέʔδΛΠϯϙʔτ
w ࣍ͷؔγάχνϟΛ࣋ͭ
func BenchmarkName(b *testing.B) { … }
w NameେจࣈͰ࢝·ΔϕϯνϚʔΫͷ໊લ
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࣮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
)
}
}
Թº࣪ ۭؾྔࢦ
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
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࣮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
)
}
}
Թº࣪ ۭؾྔࢦ
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$4ͷ
ԯճ࣮ߦͨ͠ ҆ఆͨ͠ܭଌ
ʹඞཁͳΛࣗಈͰਪఆ͍ͯ͠Δ
ଌఆ݁Ռ
ฏۉ
ܭࢉ͕୯७ͳ5Y)
ͷ΄͏͕ͪΐͬͱ͚͍ͩʂ
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ίʔυྫؔ
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ίʔυྫؔ
w ҎԼͷϧʔϧʹैͬͨؔΛ࣮͢ΔͱɺʮHPUFTUʯͰؔΛ࣮ߦ͠
ͯ݁ՌΛϨϙʔτͯ͘͠ΕΔ
w ࣍ͷؔγάχνϟͱίϝϯτΛ࣋ͭ
func ExampleName() {
(ඪ४ग़ྗ͕͋Δίʔυ)
// Output:
// (ඪ४ग़ྗͷظ͢Δ݁Ռ)
}
w NameେจࣈͰ࢝·Δίʔυྫͷ໊લ
w هड़ͨ͠ίʔυHPEPDʹදࣔ͞ΕΔ
˞HPEPDʹࡌͤΔ͜ͱ͚͕ͩओͳతͳΒඪ४ग़ྗͳͯ͘ྑ͍
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ͬͯΈΑ͏
͖͞΄ͲͷUIJ@UFTUHPʹҎԼͷίʔυΛՃ͠·͢
౷߹λʔϛφϧͰʮHPUFTUʯʻ&OUFSʼΛೖྗ͠ɺࣦഊ͢Δͷ
Λ֬ೝ͠·͢
Λʹमਖ਼͠ɺ͏ҰςετΛ࣮ߦͯ͠ޭʹͳ
Δ͜ͱΛ֬ೝ͠·͢
func ExampleTHI()
{
fmt.Println(THI(20.5, 50.0)
)
// Output
:
// 65.
8
}
見
た
目
は
文字通
り
コ
ー
ド
例
だ
け ど
、 こ れ も
立派
な
テ ス
ト コ
ー
ド ！
コ
ー
ド
例
で
触
った
部分
は
カ バ
レ ッ ジ
計測
に も
反映
さ れ ま す
Slide 25
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HPEPDͷ֬ೝ
ҎԼͷίϚϯυͰHPEPDͱ͍͏ίϚϯυϥΠϯπʔϧΛಋೖ͠·͢
go install golang.org/x/tools/cmd/godoc@latest
(࣮ߦόΠφϦ͕ <ϗʔϜσΟϨΫτϦ>/go/bin/ ҎԼʹ֨ೲ͞Ε·͢)
౷߹λʔϛφϧͰʮ~\go\bin\godocʯʻ5BCʼʻ&OUFSʼΛ࣮ߦ͠·͢˞
ϒϥβͰIUUQMPDBMIPTUʹΞΫηε͠·͢
͕ࣗ࡞ͬͨίʔυͷυΩϡϝϯςʔγϣϯΛ୳͠·͢
5IJSE1BSUZηΫγϣϯ
㸉HJUIVCDPN
ɹ㸉VNPUJPO
ɹɹ㸉HPUSBJOJOH
ɹɹɹ㸉 Ϣʔβʔ໊
ɹɹɹɹ㸉EBZUFTU
˞$PNNBOE1SPNQUͷ߹
ɹ%USERPROFILE%\go\bin\godoc
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6OPSEFSFEPVUQVU
w ॱং͕ෆఆͳෳߦͷग़ྗ&YBNQMFؔͰऔ
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
}
NBQ͔ΒͷऔΓग़͠ॱংϥϯμϜ
ॱংΛม͑ͯύε͢Δ
l6OPSEFSFEPVUQVUzͱ͢Δ
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ͦͷଞͷػೳ
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HPUFTUͷՃػೳ
w ϓϩϑΝΠϦϯά DQVQSP
fi
MF
CMPDLQSP
fi
MF
NFNQSP
fi
MF
w $16ϓϩϑΝΠϧɺώʔϓϓϩϑΝΠϧɺͪϓϩϑΝΠϧ
ΛهɾදࣔՄೳ ڭՊॻઅΛࢀর
w ϨʔεσΟςΫλʔ SBDF
w ෳͷHPSPVUJOF͕ಉ࣌ʹҰͭͷΛಡΈॻ͖ গͳ͘ͱ
͕ͭॻ͖ࠐΈ
͍ͯ͠Δ໘ ഉଞ੍ޚ࿙Ε
Λݕͯ͠Τϥʔ
ʹམͱͯ͘͠ΕΔ
w ࣮ࡍʹൃੜ͠ͳ͍ͱݕͰ͖ͳ͍ͷͰɺ௨͠ಉ͡ςετΛ
܁Γฦ࣮͠ߦͤ͞Δͷӡ༻ͱΈ߹ΘͤΔͷ͕͓קΊ
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UFTUJOHͷՃػೳ
w ςετॲཧ༻ͷNBJOؔ UFTUJOH.
˞(PͰಋೖ
w ςετ͕ؔΓग़͢લʹNBJOHPSPVUJOFͰΒ͓͖ͤͯ
͍ͨॲཧΫϦʔϯΞοϓ͍ͨ͠ॲཧ͕͋Δ߹ʹར༻
w αϒςετɾαϒϕϯνϚʔΫ U3VO
C3VO
˞(PͰಋೖ
w ϧʔϓͷதͳͲ͔Β৽ͨͳςετϕϯνϚʔΫΛ࣮ߦͰ͖Δ
w ςʔϒϧۦಈܕϕϯνϚʔΫ֊ςετͳͲෳࡶͳ͜ͱΛ͠
͍ͨͱ͖ͷΈ͏
詳
し
く は t e s
t i n g の g o d
o c に あ る E x a
m
p
l e コ
ー
ド をチ
ェ ッ ク ！
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࿅श
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࿅श
w ࿅श՝<ϑΥϧμ໊EBZUFTU>
w ΧόϨοδ͕ʹͳΔΑ͏ͳςʔϒϧۦ
ಈςετͷςετؔΛՃ͍ͯͩ͘͠͞
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ʙղઆλΠϜʙ
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͕࣌ؒ༨ͬͨΒ
w ࿅श 1
<ϑΥϧμ໊EBZDIFY>
w ·ͣ1ʹ͋ΔຊମίʔυIsPalindrome()ͱ
1ʹ͋Δςετίʔυͷࣸܦ͔Β
w ࿅श 1
<ϑΥϧμ໊EBZDIFY>
w ͷίʔυΛίϐʔ͔ͯ͠Β࢝ΊΔͱΑ͍
w ࿅श 1
<ϑΥϧμ໊EBZDIFY>
w ·ͣ1ͷ5FTU4QMJU
ͷࣸܦ͔Β
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ίʔυΛॻ͖ऴ͑ͨΒ
w ʮϢʔβʔ໊QSBDUJDFʯϒϥϯνͰ࡞ۀ͍ͯ͠Δ͜ͱΛ֬ೝ͍ͯͩ͘͠͞
w 74$PEFͷҰ൪ࠨԼʹදࣔ͞Ε͍ͯ·͢
w มߋΛεςʔδ͠ɺίϛοτ͍ͯͩ͘͠͞
w 74$PEFͷࠨϝχϡʔͷʮιʔεཧʯ͔Βૢ࡞
w ίʔυΛ(JU)VCʹϓογϡ͍ͯͩ͘͠͞
w 74$PEFͷҰ൪ࠨԼͷϒϥϯν໊ͷ͙͢ӈʹ͋ΔΞΠίϯ͔Βૢ࡞ ্ਤ
w ϓϧϦΫΤετΛ࡞͍ͯͩ͘͠͞
w ʮιʔεཧʯͷ্෦ʹΞΠίϯ͕͋Γ·͢
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࣍ճ༧ࠂ
w ࣍ճʮσʔλϕʔεΞΫηεʯͰ͢
w ͔Βͳ͔ͬͨͱ͜Ζ࣭ͳͲɺࣾ
4MBDLHPQIFSTνϟϯωϧʹߘ͍ͩ͘͞
w ຊͷ༰ΛΑΓਂ͘ཧղ͍ͨ͠ํɺڭՊॻ
ͷୈষΛಡΜͰΈ͍ͯͩ͘͞