A test and mock framework for PowerShell that enables unit testing, mocking, and code coverage analysis.
Pester is a test and mock framework specifically designed for PowerShell, allowing developers to write and execute unit tests for their scripts and modules. It solves the problem of ensuring PowerShell code reliability by providing tools for assertions, mocking dependencies, and measuring code coverage. The framework integrates seamlessly with development environments and CI/CD pipelines.
PowerShell developers and system administrators who write scripts, modules, or automation tasks and need to ensure their code is robust and maintainable. It's also valuable for DevOps teams incorporating testing into PowerShell-based CI/CD workflows.
Developers choose Pester because it's the de facto standard for PowerShell testing, offering a comprehensive, integrated solution with built-in mocking, detailed assertions, and CI/CD compatibility. Its ubiquity and active community support make it the go-to framework for ensuring PowerShell code quality.
Pester is the ubiquitous test and mock framework for PowerShell.
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
Pester is pre-installed on Windows 10 and described as the 'ubiquitous test and mock framework for PowerShell,' making it the de facto choice for PowerShell developers.
It provides built-in mocking capabilities to isolate tests and a versatile assertion suite, including specialized commands like `Should -Exist` for file verification, as shown in the README examples.
Pester exports nUnit XML and JaCoCo coverage reports, with README examples for AppVeyor and Azure DevOps, enabling easy automation in build pipelines.
The project has sponsors like Chocolatey, active contributors, and multiple support channels (e.g., Slack, Discord), ensuring ongoing development and support.
Upgrading to versions like 5.6.0 requires using `-SkipPublisherCheck` due to certificate changes, causing installation errors and user confusion, as detailed in the README.
Pester only supports testing PowerShell code, so it cannot be used for scripts in other languages, restricting its utility in mixed-language projects.
Installation on older Windows versions or Linux/Mac requires manual steps, and the README notes potential problems, adding complexity for cross-platform setups.