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Infrastructure as code is code. Treat it like your application code. A Terraform bug destroys your entire system.
Use these testing steps:
Syntax validation Use terraform validate and terraform fmt. Catch errors before production.
Static analysis Use tfsec or checkov. Check security risks. Ensure S3 buckets stay private. Fail builds for critical risks.
Unit tests Use terratest for modules. Verify your module configurations.
Plan validation Run terraform plan in test environments. Confirm changes before they happen.
Integration tests Run these in a sandbox. Use terraform apply to verify work. These tests are slow. They give the most confidence.
Compliance testing Use Open Policy Agent. Set rules for your organization. Require encryption for EBS volumes.
Destruction testing Test your destroy workflow. Stop dangling resources. Avoid extra costs.
Source: https://dev.to/therizwansaleem/testing-infrastructure-as-code-validation-linting-and-compliance-4b2i Optional learning community: https://t.me/GyaanSetuAi