Terraform Testing Types

Unit Tests

Unit testing in Terraform is all about testing individual resources as isolated units to verify that each one behaves as expected when given a specific input. This form of testing is performed at the most granular level, ensuring each module or resource performs its intended functionality correctly.

Integration Tests

Integration testing focuses on ensuring that multiple resources or modules can work together seamlessly. It tests the interaction between different resources and modules, checking that they can communicate and function together as intended. This is crucial in a Terraform environment where different resources often have dependencies on each other.

End-to-end Test

End-to-end testing is the process of testing the entire Terraform codebase to ensure the overall system is working as expected. It covers all the functions from start to finish, simulating a real-world scenario. It checks the compatibility and interactivity of all the modules together and makes sure that the whole infrastructure is set up correctly, verifying that the final output is as expected. This is crucial in ensuring the overall reliability and robustness of the Terraform deployment.