terraform-test

Terraform unit tests validate configuration logic using plan mode without provisioning resources. You define test blocks with run, variables, and assertions under a tests directory to verify expected resource attributes and behavior locally.

Yes, mock providers simulate infrastructure behavior to enable fast, deterministic feedback in CI. By mocking data sources and provider responses, you execute tests without real cloud dependencies or external API rate limits.

Plan mode executes unit tests by validating logic against the planned state without creating resources. Apply mode runs integration tests by provisioning real infrastructure to verify actual cloud behavior before destroying resources.

Integration testing uses apply mode to provision real infrastructure and verify module behavior. You define run blocks with variables and module configurations, then execute locally using the terraform test command to iterate on coverage.

Yes, Terraform test supports parallel execution controls alongside state_key and plan_options configurations. These controls manage test block concurrency, helping optimize run times for complex module and provider configurations.

Infrastructure configurations drift when untracked changes occur in cloud environments. Structured testing using run blocks, assertions, and mock providers ensures reliability and safety by validating logic before applying changes.