Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
JSerのための ブラウザコードリーディング (テスト編)
Search
Edward Fox
April 28, 2017
Programming
3
2.3k
JSerのための ブラウザコードリーディング (テスト編)
Meguro.es x Gotanda.js #1 in Drecom
https://meguroes.connpass.com/event/49543/
Edward Fox
April 28, 2017
Tweet
Share
More Decks by Edward Fox
See All by Edward Fox
Priorityを制するものはローディングを制す
edwardkenfox
4
590
Lambda@Edgeを利用したサードパーティJavaScriptのカナリアリリース / Canary release using Lamdba@Edge
edwardkenfox
0
69
AWS re:Invent 2019 / Hackathon for Good 参加録
edwardkenfox
2
510
Repro basketball club
edwardkenfox
0
210
Introduction to UX Optimizer
edwardkenfox
0
82
フロントエンド開発の落とし穴 / Fallacies of Client Side Programming (2019ver)
edwardkenfox
0
260
僕とprototypeとJSONで / Me and prototype down by the JSON
edwardkenfox
0
110
クライアントサイド開発の落とし穴 / Fallacies of Client Side Programming
edwardkenfox
0
350
Beacon API ことはじめ 〜そしてkeepalive fetchへ〜 / Beacon API The Basics
edwardkenfox
0
1k
Other Decks in Programming
See All in Programming
C++でシェーダを書く
fadis
6
4.1k
【Kaigi on Rails 2024】YOUTRUST スポンサーLT
krpk1900
1
330
Jakarta EE meets AI
ivargrimstad
0
180
ペアーズにおけるAmazon Bedrockを⽤いた障害対応⽀援 ⽣成AIツールの導⼊事例 @ 20241115配信AWSウェビナー登壇
fukubaka0825
6
1.9k
Jakarta EE meets AI
ivargrimstad
0
560
cmp.Or に感動した
otakakot
3
180
Contemporary Test Cases
maaretp
0
140
광고 소재 심사 과정에 AI를 도입하여 광고 서비스 생산성 향상시키기
kakao
PRO
0
170
A Journey of Contribution and Collaboration in Open Source
ivargrimstad
0
930
みんなでプロポーザルを書いてみた
yuriko1211
0
260
ECS Service Connectのこれまでのアップデートと今後のRoadmapを見てみる
tkikuc
2
250
役立つログに取り組もう
irof
28
9.6k
Featured
See All Featured
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
Practical Orchestrator
shlominoach
186
10k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
27
4.3k
The Invisible Side of Design
smashingmag
298
50k
Typedesign – Prime Four
hannesfritz
40
2.4k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
4
370
Designing for humans not robots
tammielis
250
25k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
25
1.8k
Scaling GitHub
holman
458
140k
No one is an island. Learnings from fostering a developers community.
thoeni
19
3k
Why Our Code Smells
bkeepers
PRO
334
57k
Transcript
JSerͷͨΊͷ ϒϥβίʔυϦʔσΟϯά ʢςετฤʣ EDWARD FOX @Meguro.es x Gotanda.js #1 2017/04/28
Edward Fox - Developer @ Repro Inc. - RoR, JavaScript,
AWS - Vue.js, HTTP/2, WebAssembly
લճͷMeguro.esͰ ͜ΜͳΛͤͯ͞Β͍· ͨ͠
None
ϒϥβͷΠϯεϖΫλʹ console.logͱೖྗͨ͠༰ ͕࣮ࡍʹදࣔ͞ΕΔ·Ͱ
ࠓճ͏ͪΐ͍ ࣮ફతͳΛ͠·͢
1. ຊ൪ڥͰΤϥʔ͕ى͖ͨ 2. ௐࠪͯ͠શવΘ͔ΒΜ 3. WebKitͷϦϙδτϦͰgrep 4. ςετίʔυʹώοτͨ͠
ςετίʔυΛಡΜͰ͍͘ͱ ৭ʑͱֶͼ͕͋ͬͨͷͰ ͍͔ͭ͘Λհ
WebKitͷιʔείʔυ֓؍
LayoutTests
1. DOM 2. Security 3. Performance #1 4. Performance #2
1. DOM
LayoutTests/dom/level2/core/ setAttributeNS10.html
ظ͢Δಈ࡞: > setAttributeʹෆਖ਼ͳจࣈ ྻΛ͢ͱ InvalidCharacterError͕ ্͕Δ͜ͱ
ϒϥβͰ։͘
SUCCESS!
2. Security
LayoutTests/security/ contentSecurityPolicy/image- with-blob-url-blocked-by-img- src-star.html
ظ͢Δಈ࡞: > ϖʔδʹ”image-src *”ͷ CSPϔομ͕ଘࡏ͢Δ߹ɺ blob URLΛ௨ͯ͡࡞͞Εͨ ը૾ͷಡΈࠐΈ͕ ϒϩοΫ͞ΕΔ͜ͱ
ϒϥβͰ։͘
PASS!
3. Performance #1
LayoutTests/perf/array-nested- loop.html
ظ͢Δಈ࡞: > ωετ͞Εͨྻͷ ܁Γฦ͠ॲཧͷ࣌ؒܭࢉྔ͕ O(n^2)Ͱ૿Ճ͢Δ͜ͱ
magnitude iterations 2 112352 4 52595 8 118454 16 75968
32 27994 64 7237 128 2277 256 699 512 186 1024 47 2048 12 4096 4
͡Ίͷํ͕҆ఆ ͠ͳ͍͕ɺ16Ҏ߱ظ ௨ΓͷύϑΥʔϚϯεྼԽ͕ ݟΒΕΔ
҆ఆ͠ͳ͍ཧ༝: ϒϥβͷJITίϯύΠϧʹ ͷ͔ͬΔ·Ͱͷϥάʁ ʢৄ͍͠ਓڭ͍͑ͯͩ͘͞ʣ
2. Performance #2
LayoutTests/perf/document- contains.html
ظ͢Δಈ࡞: > document.contains() ͷ ࣌ؒܭࢉྔ͕O(1)Ͱ͋Δ͜ͱ
magnitude iterations 2 70107 4 59787 8 95958 16 129782
32 128047 64 130236 128 140427 256 122163 512 115772 1024 130717 2048 117249 4096 138466
Γ͡Ίෆ҆ఆ͕ͩɺ 16͘Β͍͔ΒҰఆͷΛ อ͍ͬͯΔ
·ͱΊ
Undocumentedͳ༷ڍಈ Ͱ͋ͬͯɺϒϥβͷ ςετίʔυ ͪΌΜͱ͋ͬͨΓ͢Δ
=> ༷͚ͩͰͳ͘ɺ ࣮ʹͱͮ͘ڍಈ͕ ཧղͰ͖Δ
ϑΝΠϧ໊આ໌తͰɺ HTML/JSͰॻ͔Ε͍ͯΔͷͰ ࠶ݱ؆୯
=> ϒϥβͷςετίʔυ ΛಡΜͰ͍͘͜ͱͰɺ JavaScriptΛॻ͘ਓؒʹ ͱֶͬͯͼ͕͋Δ
͓·͚
WebKitϦϙδτϦશମͰ 27ສϑΝΠϧ͕͋ΔͷͰ grepͳͲ͕ΠνΠνਏ͍
- git status: 1-2 - git grep: 10ऑ
ରࡦ1: ιʔείʔυΛ෦తʹ μϯϩʔυ͢Δ
ରࡦ2: maxvodesͱ͍͏ ΧʔωϧύϥϝʔλͷΛ ্͛Δ
edwardkenfox.com/blog/ browser-test-code-for-jsers/