AUTOMATING MICROSERVICES:

WHAT, WHERE AND WHEN

Oleksandr RomanovIT Weekend Dnipro 2018

WHO AM I?

• 6+ years in test automation

• QA Automation Lead at Playtika

DICLAIMER

• All opinions are completely my own

• Microservices – backend architecture

• For hardcore code, check =>

The story so far

REGRESSION. RELEASE. REPEAT.

First automated tests…

CROSS BROWSER AUTOMATION

TESTS ON IE

Good old flakiness

MAYBE, API LEVEL TESTING?

CHILL OUT, HERO

HERE COMES

MICROSERVICES!

WINTER IS COMING?

MICROSERVICES?

WHAT THE HELL ARE

API LEVEL TESTING, AGAIN?

— YOUR ARCHITECT

«We need to release each microservice separately and fast».

THE PYRAMIDhttps://martinfowler.com/ar

ticles/microservice-testing/

MICROSERVICES TEST AUTOMATION APPROACH

GUIDE THROUGH THE LEVELS

Unit tests

• Implemented by developers

• Concentrated on positive and corner cases

• Mocking and stubbing are heavily used

Integration tests: what to test

• Persistence: SQL and NoSQL storages

• Gateway: HTTP REST, Messaging, RPC,

etc.

Integration tests: how to test

• In – memory solutions for testing

• Dependencies in docker containers

• Using SQLUnit / NoSQLUnit / scripts for test data

Component tests: what

• Testing main functionality of the microservice

• Testing corner cases if external services are unavailable

Component tests: how to test

• Testing through public / internal API

• Running service locally and / or dependencies in docker containers

Test Containers: https://bit.ly/2KYhc4N

Spring Boot Test Containers: https://bit.ly/2GTc13S

• Mocking out external services: e.g. via WireMock https://bit.ly/2pSFLZb

Contracttests: what

• Testing semantics

• Do not test functionality

Contract tests: example

Contract tests: how

PACT - https://bit.ly/2GUBIAX

Spring Cloud Contract - https://bit.ly/2GYi0Jy

End – to – End tests:

• Cover business flows

• Cover platform dependent cases

• Can be done on API or UI levels

So, what?

One badmicroservice?

Recommendations

• Sam Newman – Building Microservices https://oreil.ly/1pp6qmx

• Martin Fowler – Testing Strategies in Microservices https://bit.ly/2pWi0AA

To sum up:

• Automate each microservice separately

• Run locally as much tests as you can

• End - to - end tests are important too

Twitter: @al8xrSkype: alex_roma_nov

THANK YOU!