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
Let's make this test suite run faster! - BeJUG
Search
dgageot
April 05, 2012
Programming
1
560
Let's make this test suite run faster! - BeJUG
dgageot
April 05, 2012
Tweet
Share
More Decks by dgageot
See All by dgageot
Docker on Google Cloud Platform
dgageot
0
1.7k
Lightning Talk Mix-IT 2014
dgageot
0
800
CodeStory 2013 "La Selection Finale"
dgageot
0
750
Finale Code Story
dgageot
1
710
Le facilitateur, un rôle encore méconnu
dgageot
1
200
Mockito. Ecrire des tests unitaires est devenu simple.
dgageot
2
430
Git, la gestion de configuration qui vous veut du bien
dgageot
1
460
My own preferred testing techniques
dgageot
1
110
Let's make this test suite run faster
dgageot
1
58
Other Decks in Programming
See All in Programming
AI時代のドメイン駆動設計-DDD実践におけるAI活用のあり方 / ddd-in-ai-era
minodriven
23
9k
技術的負債で信頼性が限界だったWordPress運用をShifterで完全復活させた話
rvirus0817
1
2.1k
Constant integer division faster than compiler-generated code
herumi
2
700
学習を成果に繋げるための個人開発の考え方 〜 「学習のための個人開発」のすすめ / personal project for leaning
panda_program
1
110
CSC305 Summer Lecture 06
javiergs
PRO
0
100
Oracle Database Technology Night 92 Database Connection control FAN-AC
oracle4engineer
PRO
1
210
Laravel Boost 超入門
fire_arlo
1
130
Rancher と Terraform
fufuhu
0
110
ソフトウェアテスト徹底指南書の紹介
goyoki
1
110
物語を動かす行動"量" #エンジニアニメ
konifar
14
5.5k
STUNMESH-go: Wireguard NAT穿隧工具的源起與介紹
tjjh89017
0
390
私の後悔をAWS DMSで解決した話
hiramax
4
140
Featured
See All Featured
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
Facilitating Awesome Meetings
lara
55
6.5k
Scaling GitHub
holman
462
140k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Visualization
eitanlees
147
16k
The Invisible Side of Design
smashingmag
301
51k
BBQ
matthewcrist
89
9.8k
The Art of Programming - Codeland 2020
erikaheidi
55
13k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
Build your cross-platform service in a week with App Engine
jlugia
231
18k
GitHub's CSS Performance
jonrohan
1031
460k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
3k
Transcript
Let's make this test suite run faster!
David Gageot Freelance developer @dgageot javabien.net
Why make a test suite run faster?
“ I firmly believe it can make your product better.
Faster to test leads to faster to write, deploy and use ” Anonymous bearded freelance developper
You test early and often. Right?
Continuous integration?
Continuous testing?
Continuous deployment?
Testing a lot can lead to waiting a lot
How wants his coding room to look like
Test suite duration can be contained
Jenkins slaves to the rescue
Jenkins slaves to the rescue. not.
Why complicated when it can be simple?
I’ll share a few easy tricks
“ I firmly believe it can make your product better.
Faster to test leads to faster to write, deploy and use ” Anonymous bearded freelance developper
How can we accelerate the tests? The Cheater The Lazy
The Cheater
Buy a faster machine. Tests are cpu/
Thank you Q/A
BUT single threaded tests get slower 0 25 50 75
100 2007 2008 2009 2010
Use all the cores with Maven3 mvn -T1 clean install
: 5:05s mvn -T4 clean install : 3:10s Beware of tests with side effects
It’s not just me
Use all the cores with JUnit/TestNG Beware of tests with
side effects
That’s it for cheaters No silver bullet
The Lazy
Delete useless tests It’s so simple, we don’t do it...
Even better, delete dead code
Even better, delete dead code Leads to deleting even more
useless tests
Work in a sandbox In-memory database H2 behaves much like
MySql As simple as changing an xml file The database is slow
It’s Not only SQL If going for NoSQL, choose a
server that can run in-process eg. Voldemort The network is slow
In-memory SMTP Server SubEtha SMTP
Abstract the filesystem Apache VFS (Virtual File System) Spring Resource...
In-memory everything As a bonus, tests will run smoother
Of course all of these are easier to setup at
the beginning of a project
The
5 minutes a day can make a difference
Don’t test business rules in integration Unit tests are often
a better place
Not the same scale of speed 10sec .01sec
Action #1 - Break the longer integration Into one faster
integration test and a lot of small
Action #2 - Mock the slowest layers Mocks are not
just for unit tests eg. with Spring and Mockito spies
Action #3 - Don’t test through the Selenium is often
overkill «But my application is complex!» «My users want complex features, My users want Ajax» «I need to test browser compatibility!»
Really?
Complexity has a cost That you pay each time tests
run
Test through the browser the strict Unit test Javascript
Action #4 - Sometimes be old school write (easier to
test) server-side code
Thank you Q/A
One more thing™ Action #0 - Simplify and optimize your
code Tests will run faster Keep that one secret...
Thank you Q/A