You need an isolated, fully automated test environment for Cloud Run, created with minimal effort and run by automated tests. What should you do?

Creating a new Google Cloud project for each test run ensures complete isolation, preventing interference between tests and with production environments. Terraform is ideal for this as it allows declarative infrastructure as code, making project creation and resource deployment repeatable and automated. Cloud Build orchestrates this process, executing the Terraform scripts. Deploying to an existing project with traffic splitting (options 2 and 4) doesn't provide full isolation, as other services or configurations in the project could impact the test. While gcloud commands (options 3 and 4) can create projects and deploy services, Terraform offers a more robust, auditable, and maintainable solution for managing infrastructure as code, which is generally preferred for automated environment provisioning.