Designing a Test Strategy for Serverless Applications
Luke Hedger
The LEGO Group
National DevOps Conference - Sept 2022
Context
Attributes of a serverless app
- EDA
- Managed services (or, SaaS)
- Async/Latency
- Distributed
Serverless Test Square of Balance 🟨 (or TORD)
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Test - small tests, quick to run
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Observe - alerts, tracing, logs, synthetics
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Recover - fault tolerance, replays
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Deploy - fixes, delivery pipeline
Shared resp model for testing
- Don’t test what you can’t fix - flaky tests often due to things out of our control
Case study architecture API -> Lambda -> EventBridge -> Lambda -> DynamoDB
Analyse failure modes of architecture
Lambda function unit test, including AWS SDK mock/spy
Integration tests
Critical path functional tests (public API) - Jest + got
Synthetic monitoring
Conclusion
Designing a Test Strategy for Serverless Applications @level_out Luke Hedger The LEGO Group National DevOps Conference - Sept 2022