Integration Testing
Node.js integration tests that mock PostgreSQL and Redis test your assumptions, not your code. testcontainers starts real database containers during your Jest run and tears them down after. Your tests talk to the actual services — no mocks, no drift, no surprises. Key Takeaways testcontainers/node works with Jest, Vitest,
Docker
Shipping a Docker image without testing it is like deploying code without tests — the problems show up in production. Docker containers need their own testing layer: build tests, container smoke tests, integration tests, and security scans. Here's how to build that layer. Key Takeaways Test at four levels:
CI/CD
Container-based integration tests are slower in CI than you want them to be — mostly because of image pulls, layer rebuilds, and serial test execution. Fix that with layer caching, GitHub Actions service containers, and parallel job splitting. Here's exactly how. Key Takeaways GitHub Actions service containers are