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Testing APIs & Microservices
Arne Limburg | open knowledge GmbH
Testing APIs & Microservices | Arne Limburg
ÜBER OPEN KNOWLEDGE
Branchenneutrale Softwareentwicklung & IT-Beratung
Testing APIs & Microservices | Arne Limburg
ÜBER MICH
Testing APIs & Microservices | Arne Limburg
• Enterprise Architect bei der open knowledge GmbH
• Themen
• Microservices
• Domain Driven Design
• APIs
• Architektur
• Coaching
• Technologie (Java EE / Jakarta EE / Microprofile)
Arne Limburg
TEST-PYRAMIDE
Komponenten-
Tests
Unit-Tests
Inte-
gration-
Tests
Testing APIs & Microservices | Arne Limburg
Unit -Testing
Testing APIs & Microservices | Arne Limburg
Lesbarkeit der Tests
Testing APIs & Microservices | Arne Limburg
Testdaten
Testing APIs & Microservices | Arne Limburg
Komponententests
Testing APIs & Microservices | Arne Limburg
DATENBANK-TESTS
Testing APIs & Microservices | Arne Limburg
In-Memory vs. Real DB
In-Memory Database
• Pro: Kein Setup
• Contra:
• Blick auf die Testdaten schwer
• Multi-Module-Tests kompliziert
Real Database
• Pro: „Echter“ Test
• Contra: Kompliziertes Setup
Herausforderung bei beiden: Testdaten (again)
Testing APIs & Microservices | Arne Limburg
BUSINESS-COMPONENT-TEST
Testing APIs & Microservices | Arne Limburg
CDI Tests
• Pro:
• Performance (kein Deployment)
• Leichteres Debugging
• Contra:
• Deployment schwer konfigurierbar
Arquillian Tests
• Pro:
• „Echter“ Container-Test
• Deployment konfigurierbar
• Contra: Performance
Dependency Injection in Tests
Testing APIs & Microservices | Arne Limburg
Black-Box vs. White-Box
Testing APIs & Microservices | Arne Limburg
TEST-HONEYCOMP
Integrated
Tests
Unit-
Tests
Integration-
Tests
Testing APIs & Microservices | Arne Limburg
INTEGRATED TESTS
„A test that will pass or fail based on the correctness of another system.“
J.B. Rainsberger
Testing APIs & Microservices | Arne Limburg
@ArneLimburg @_openknowledge #WISSENTEILEN
Consumer-Driven Contract Testing
WELCHE CLIENTS NUTZEN MICH?
Testing APIs & Microservices | Arne Limburg
API (PROVIDER CONTRACT)
Testing APIs & Microservices | Arne Limburg
CONSUMER CONTRACT
Testing APIs & Microservices | Arne Limburg
CONSUMER CONTRACT – YAGNI
Testing APIs & Microservices | Arne Limburg
CONSUMER-DRIVEN CONTRACT TEST
Consumer
Contract
Consumer Provider
Consumer
Tests
Provider
Tests
Testing APIs & Microservices | Arne Limburg
PIPELINE TO DEPLOY TO STAGE
Execute
Own
Provider
Tests
Generate
Consumer
Contract
Execute
Depending
Provider
Tests
Deploy
to
Stage
Testing APIs & Microservices | Arne Limburg
PIPELINE TO DEPLOY TO STAGE
Execute
Own
Provider
Tests
Generate
Consumer
Contract
Execute
Depending
Provider
Tests
Deploy
to
Stage
Achtung:
Abwärtskompatibilität ist
trotzdem notwendig!
Testing APIs & Microservices | Arne Limburg
BREAKING CHANGE VOM PROVIDER
Execute
Own
Provider
Tests
Generate
Consumer
Contract
Execute
Depending
Provider
Tests
Deploy
to
Stage
Testing APIs & Microservices | Arne Limburg
BREAKING CHANGE VOM CONSUMER
Execute
Own
Provider
Tests
Generate
Consumer
Contract
Execute
Depending
Provider
Tests
Deploy
to
Stage
Testing APIs & Microservices | Arne Limburg
Chaos Testing
Testing APIs & Microservices | Arne Limburg
FRAGEN
? ? ?
Testing APIs & Microservices | Arne Limburg
KONTAKT
ARNE LIMBURG,
ENTERPRISE ARCHITEKT
arne.limburg@openknowledge.de
+49 (0)441 4082 0
@ArneLimburg
@_openknowledge
OFFENKUNDIGGUT
Testing APIs & Microservices | Arne Limburg

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