Terraform Testing on GCP
Write native Terraform tests for Google Cloud modules with plan-mode, mocked, and real apply-mode validation.

Lab Overview
Build a complete Terraform testing workflow for Google Cloud Storage modules using the built-in `terraform test` command.
You will start by writing `.tftest.hcl` files for a prebuilt GCS bucket module, then run those tests in plan mode for fast feedback, add expected-failure coverage for variable validation, use provider mocking to avoid real API calls, and finish with integration tests that create and verify a real bucket in GCP.
By the end of the lab, you will understand how to combine fast unit-style checks with slower end-to-end tests so your Terraform modules can be validated confidently in local development and CI pipelines.
What You'll Learn
Write test files using the .tftest.hcl format
Run plan-based tests to validate configuration logic
Use mock providers to eliminate API calls in unit tests
Test variable validation with expect_failures
Run apply-mode integration tests against real GCP resources
Prerequisites
Understanding of Terraform basics
Familiarity with Terraform modules
Basic Google Cloud knowledge
Technologies Covered
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