Pester
Pester is the ubiquitous test and mock framework for PowerShell
Pester is the de-facto unit testing and mocking framework for PowerShell, widely used to validate scripts, modules, and automation workflows. It provides a readable DSL for writing Describe/Context/It style specs, expressive assertion helpers (Should), and facilities for setup/teardown to keep tests isolated and reproducible. Beyond unit tests, Pester supports integration tests and can mock functions and modules so external side effects (network, registry, file system) are faked during runs....