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Backside of coverage measurement of Go
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po3rin
May 20, 2019
Programming
1
94
Backside of coverage measurement of Go
Go Conference Tokyo 二次会のLTです!Goのカバレッジ計測の裏側について
po3rin
May 20, 2019
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Transcript
Backside of coverage measurement In Go Gopher Conference Tokyo 2019
Spring Second party May 20, 2019 @ po3rin
@po3rin Software Enginner @ Shiroyagi Corporation QBHF Golang / Python
/ Rust / Docker / AWS / Elasticsearch
QBHF (P$POGFSFODF5PLZP4QSJOHͰొஃ͠·ͨ͠ʂʂ IUUQTTQFBLFSEFDLDPNQPSJOEJWFJOUPCVJMELJUMMCXJUIHP
QBHF Introduction \
QBHF (Pඪ४ͰςετΧόϨοδΛऔΕΔ Coverage of Go Ὂ
QBHF What happened Ὂ ۀͰ$PWFSBHFͷؔͰΤϥʔ͕ɻɻͦ ͜Ͱؾ͍ͮͨ(PͷΧόϨοδͷ୲อ͢ΔͷͱԿ ͳͷ͔ΛΧόϨοδܭଌͷ࣮͔ΒௐͯΈ·ͨ͠
QBHF ɾ(PͷΧόϨοδ͕ͲͷΑ͏ʹߦΘΕ͍ͯΔ ͍ͷ͔ΛཧղͰ͖Δ ɾ(PͷΧόϨοδͷܭଌํ๏͔Β։ൃ࣌ʹ ҙ͢Δ͖͜ͱΛֶΔ Ὂ the benefits of this
talk
QBHF Reading Go source code of “cover” \
QBHF Reading Go source code of “cover” (1) Ὂ HJUIVCDPNHPMBOHHP
TSDDNEDPWFS DPWFSHP
QBHF Reading Go source code of “cover” (2) Ὂ QBSTFS1BSTF'JMFͰ(PϑΝΠϧΛ੩తղੳ͍ͯ͠Δɻ
FSSলུ
QBHF Reading Go source code of “cover” (3) Ὂ QBSTFS1BSTF'JMFͰಘͨ
BTU'JMFΛ͞Βʹಠࣗͷ DPWFS'JMFߏମʹ֨ೲ͍ͯ͠ ΔɻͦΕΛBTU8BMLʹͯ͠ ͍Δɻͭ·ΓDPWFS'JMF BTU7JTJUJOUFSGBDFΛ࣮ͯ͠ ͍Δͷ͕Θ͔Δ
QBHF Reading Go source code of “cover” (3) Ὂ BTU#MPDLʹͨͲΓண͘·Ͱ8BMLΛճ͠ଓ͚ɺϒϩοΫΛ
ݟ͚ͭͨΒBEE$PVOUFSTΛಡΜͰ͍Δ
QBHF Reading Go source code of “cover” (3) Ὂ BEE$PVOUFST͕ίʔυʹΧϯλʔΛࠩ͠ࠐΜͰɺς
ετதʹ͜͜Λ௨͔ͬͨΛه͍ͯ͠Δɻ #PEZলུ
QBHF Show annotated source code Ὂ DPWFSBHFܭଌதʹΧϯ λʔࠐΜͩίʔυ͕Ͳ͏ ͳ͍ͬͯΔͷ͔ΛݟΔͨΊ ͚ͩͷ୭ಘϚχΞ͚πʔ
ϧɻ
QBHF Show annotated source code Ὂ
QBHF ΧόϨοδܭଌͷछྨ Ὂ ໋ྩཏɿTUBUFNFOUDPWFSBHFʣ ذཏɿCSBODIDPWFSBHFʣ ݅ཏɿDPOEJUJPODPWFSBHFʣ C0 C1 C2
QBHF ΧόϨοδܭଌͷछྨ Ὂ BCUSVF ͷ̍έʔεΛ࣮ߦ͢Ε BCUSVF BCGBMTF ͷέʔεΛ࣮ߦ͢Ε BͱCͷUSVFPSGBMTFͷΈ߹Θͤ έʔεΛ࣮ߦ͢Ε
C0 C1 C2
QBHF ΧόϨοδܭଌͷछྨ Ὂ BCUSVF ͷ̍έʔεΛ࣮ߦ͢Ε BCUSVF BCGBMTF ͷέʔεΛ࣮ߦ͢Ε BͱCͷUSVFPSGBMTFͷΈ߹Θͤ έʔεΛ࣮ߦ͢Ε
C0 C1 C2
QBHF ͭ·Γ(PͷΧόϨοδܭଌ C0 !!!
QBHF ΧόϨοδͰશύλʔϯΛཏͰ͖͍ͯΔ༁Ͱͳ͍ɻ ΧόϨοδ͚ͩʹཔΓΒͣʹɺͪΌΜͱࣗͰύλʔϯΛ ཏͰ͖͍ͯΔ͔ҙ࣮͍ͯͯ͘͠͠ඞཁ͕͋Δɻ
QBHF Additional Talk \
QBHF (Pͷ੩తղੳΛղઆͨ͠ബ͍ ຊʂ#PPUIͰൢച͞Εͯ·͢ɻ ੩తղੳʹڵຯΛ࣋ͬͨΒ͜Ε ΛಡΊྑ͍ɻ
QBHF (P$POGFSFODF5PLZP4QSJOHͰొஃ͠·͢ɻ Ὂ
Backside of coverage measurement In Go Gopher Conference Tokyo 2019
Spring Second party May 20, 2019 @ po3rin