Automating Terraform Testing: From Unit Tests to End-to-End Validation

Day 18 of my Terraform journey was one of the most exciting so far because it brought everything together: local testing, real AWS validation, and a CI/CD pipeline that runs automatically in GitHub Actions. In Chapter 9 of Terraform: Up & Running , Yevgeniy Brikman explains that manual testing is necessary, but it does not scale. Once infrastructure grows beyond what one person can test by hand every time, you need automation that catches regressions early and gives the whole team confidence to move faster. That was the focus of today. I implemented all three layers of Terraform testing: unit tests with terraform test integration tests with Terratest end-to-end tests with Terratest a GitHub Actions workflow to run them automatically GitHub reference: 👉 GitHub Day 18 Link Why One Test Type Is Not Enough One of the clearest lessons from today is that no single test layer is enough on its own. If you only use unit tests: they are fast and cheap but they do not prove real AWS behavior If y