For example, ‘ 1’ file contains some project-level tests that will be executed against the module definitions and all existing and future function definitions.Īs functions generally implement different logic, these top-level tests for functions ensure only common code style and comment-based help quality. What I like the most about Pester is that you write your test cases in the same PowerShell language, and, as a result, you can use the same scripting logic to make your tests dynamic. Pester testsĪll project tests are implemented with the Pester test framework. It has no fancy logic, just a function definition according to general PowerShell guidelines. This pattern encourages you to define each function in a separate file and maintain a clean and intuitive codebase.įor the sake of simplicity, the module contains only one public function, which generates a range of GUIDs based on the input parameter. People who already familiar with PowerShell module development might immediately recognize a definitive pattern when a module has some public functions to be exported and, optionally, some internal helper functions invoked from the public ones and not accessible to a third party. Basically, it doesn’t contain any functions and serves as a load script for individual function definitions located in the ‘Public’ and ‘Private’ subfolder. If you check the module definition in ‘ SampleModule.psm1’ file, you might find it somewhat minimalistic. This structure makes the sample more reusable so that you can fork or clone the repository to your local machine and make it fully workable with a minimum of tweaks. I put all the module sources into ‘ SampleModule’ folder and keep everything else in the project root. The repository contains both the code for the sample PowerShell module and the configuration for its build process. ![]() The source code for the project is hosted in ‘ powershell.sample-module’ GitHub repository. For the best experience, I suggest opening this article and the source code side by side so that you can easily follow the references to specific project parts. ![]() Here I will go through the same topics and describe step-by-step the whole build process. Following my post on embracing DevOps practices in PowerShell automation, I decided to share a sample PowerShell module project with CI/CD pipeline that would put theory in practice.
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