The blog post discusses the application of test-driven development (TDD) techniques to infrastructure using Node.js with TypeScript, the Mocha test framework, and the Chai assertion library. The focus is on how to test infrastructure components such as an Amazon EKS cluster, ensuring it meets specific criteria like running a particular Kubernetes version and being provisioned inside a private VPC. Using Pulumi's infrastructure-as-code capabilities, tests are embedded alongside code definitions, enabling robust validation and enforcement of team standards and security guidelines. The post provides a step-by-step guide on setting up tests, running them during the deployment process using Pulumi's preview and update commands, and handling potential challenges such as unknown values during previews. This approach allows for catching configuration errors early, leveraging Pulumi's integration with general-purpose programming languages to apply software development best practices to infrastructure management.