terraform-tests

Terraform tests use .tftest.hcl files containing test blocks, run blocks, and assertions to validate module behavior. You organize test files to exercise local modules and remote providers, then run terraform test to verify configurations before deployment.

Validating Terraform modules before deployment is best done using the built-in testing framework with test, run, and assertion blocks. This approach exercises module behavior and provider interactions to ensure configuration changes are safe across environments.

Negative testing in Terraform is supported using the expect_failures mechanism within run blocks. You configure assertions to anticipate and verify intentional module failures, ensuring your infrastructure modules handle invalid configurations as expected.

Helper modules for Terraform test setup and validation are organized within test files to manage data generation and cleanup. You structure these alongside test and run blocks to provide necessary scaffolding and validate outputs across local and remote providers.

Terraform test supports variable and provider scoping within .tftest.hcl files to isolate module testing environments. You define provider configurations and variables directly in test blocks to control context and ensure accurate assertion results.