What is Testcontainers and how does it work?

Docker-based lib for real service containers in tests. Spins Postgres, Redis, etc., runs your code against 'em, tears down after.

Testcontainers vs mocks: which is better for database testing ?

Testcontainers for truth over speed. Mocks for fragility masquerading as efficiency. Pick reality if you hate prod fires.

Slower setup, yes. But cache images, share containers, and it stabilizes. Worth the fight for reliable deploys.

🗄️ Databases & Backend

Your green tests are mocking you. Testcontainers spins up real databases, exposing the lies mocks tell about your code.

theAIcatchup Apr 10, 2026 3 min read

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#Docker testing #Go testing #database testing #mocks #mocks vs integration #mocks vs integration tests #testcontainers

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Originally reported by dev.to