terraform-testing

You can validate Terraform modules without real resources by using the testing framework's plan mode and mock_provider blocks to simulate AWS, Azure, and GCP resources, ensuring safe regression testing without modifying existing infrastructure.

Terraform testing uses .tftest.hcl or .tftest.json files containing test and run blocks. Place them in a tests directory to execute unit tests in plan mode and integration tests in apply mode with state management and parallel execution.

Yes, Terraform's testing framework supports mocking providers and data sources. Using mock_provider blocks within your .tftest.hcl files allows you to isolate module validation and run cross-resource assertions without authenticating to cloud platforms.

Cross-resource assertions are handled using assert blocks within run blocks in your test files. This framework validates configurations across AWS, Azure, and GCP patterns while supporting variable passing and state isolation during parallel execution.

Yes, the Terraform testing framework supports parallel execution with state isolation. This allows multiple run blocks to execute independently against temporary resources, protecting existing state files while providing robust regression coverage.