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
An Introduction to Snapshot testing
Search
Freek Van der Herten
September 01, 2021
Technology
0
500
An Introduction to Snapshot testing
Freek Van der Herten
September 01, 2021
Tweet
Share
More Decks by Freek Van der Herten
See All by Freek Van der Herten
Uncharted packages (Laravel Live Denmark)
freekmurze
0
210
I shall define this only once
freekmurze
0
410
Event Sourcing In Laravel
freekmurze
0
250
Building a realtime dashboard with Laravel Livewire (PHPKonf)
freekmurze
0
810
A tour behind the scenes of Oh Dear (PHP Benelux)
freekmurze
2
860
A practical look at multitenancy in Laravel
freekmurze
1
360
A practical look at multitenancy in Laravel (Laracon US)
freekmurze
0
730
Highlights Flare codebase (Laracon online)
freekmurze
0
520
Introducing Mailcoach
freekmurze
1
630
Other Decks in Technology
See All in Technology
AIは変更差分からユニットテスト_結合テスト_システムテストでテストすべきことが出せるのか?
mineo_matsuya
5
2.5k
なごミュ@SPAJAM2025 第二回予選
1901drama
0
110
Amazon Q と『音楽』-ゲーム音楽もAmazonQで作成してみた感想-
senseofunity129
0
170
Exadata Database Service on Dedicated Infrastructure セキュリティ、ネットワーク、および管理について
oracle4engineer
PRO
1
330
マルチプロダクト×マルチテナントを支えるモジュラモノリスを中心としたアソビューのアーキテクチャ
disc99
1
660
Amazon Qで2Dゲームを作成してみた
siromi
0
170
PFEM Online Feature Flag @ newmo
shinyaishitobi
1
140
【新卒研修資料】数理最適化 / Mathematical Optimization
brainpadpr
29
14k
Amazon Bedrock AgentCoreのフロントエンドを探す旅 (Next.js編)
kmiya84377
1
160
Jamf Connect ZTNAとMDMで実現! 金融ベンチャーにおける「デバイストラスト」実例と軌跡 / Kyash Device Trust
rela1470
1
210
AIエージェントを現場で使う / 2025.08.07 著者陣に聞く!現場で活用するためのAIエージェント実践入門(Findyランチセッション)
smiyawaki0820
7
1.3k
LLM 機能を支える Langfuse / ClickHouse のサーバレス化
yuu26
9
2.6k
Featured
See All Featured
Scaling GitHub
holman
462
140k
4 Signs Your Business is Dying
shpigford
184
22k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
283
13k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
234
17k
Producing Creativity
orderedlist
PRO
347
40k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Adopting Sorbet at Scale
ufuk
77
9.5k
A designer walks into a library…
pauljervisheath
207
24k
ピンチをチャンスに:未来をつくるプロダクトロードマップ #pmconf2020
aki_iinuma
126
53k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
46
7.6k
KATA
mclloyd
32
14k
Transcript
AN INTRODUCTION TO SNAPSHOT TESTING Freek Van der Herten
About me Freek Van der Herten Developer at SPATIE @freekmurze
freek.dev spatie.be/products ohdear.app
spatie.be/open-source 300+ open source packages PHP & Laravel 175 million
downloads total 9 million downloads per month
LET’S TALK ABOUT SNAPSHOT TESTING
What? A file on disk – let’s call it a
snapshot Test succeeds if the output matches the snapshot If not, the test will fail
Where does it come from? Characterisation testing Popularized by Facebook
Jest Testing interfaces
How can we do it in PHP? github.com/spatie/phpunit-snapshot-assertions github.com/spatie/pest-plugin-snapshots assertMatchesSnapshot
assertMatchesJsonSnapshot assertMatchesXmlSnapshot
DEMO
WRAPPING UP
Advantages Very easy to get started with Can be used
to validate complex output Easily update all the tests in one go
Disadvantages Brittle Hard to pinpoint exact point of failure Bugs
can be easily written in the snapshots
Interesting links github.com/spatie/phpunit-snapshot-assertions github.com/spatie/pest-plugin-snapshots github.com/spatie/shiki-php github.com/spatie/laravel-markdown torchlight.dev
ONE MORE THING
testing-laravel.com Premium video course, 6+ hours of video Learn how
to tests a Laravel app from scratch Tips and tricks to sharpen your skills Two courses in one: Pest & PHPUnit 10 % discount with SPATIE-LOVES-LARACON
Thank you! spatie.be spatie.be/products spatie.be/open-source testing-laravel.com freek.dev