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Mastering PowerShell Scripting

You're reading from   Mastering PowerShell Scripting Automate and manage your environment using PowerShell 7.1

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Product type Paperback
Published in Jun 2021
Publisher Packt
ISBN-13 9781800206540
Length 788 pages
Edition 4th Edition
Languages
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Author (1):
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Chris Dent Chris Dent
Author Profile Icon Chris Dent
Chris Dent
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Table of Contents (26) Chapters Close

Preface 1. Introduction to PowerShell 2. Modules and Snap-Ins FREE CHAPTER 3. Working with Objects in PowerShell 4. Operators 5. Variables, Arrays, and Hashtables 6. Conditional Statements and Loops 7. Working with .NET 8. Strings, Numbers, and Dates 9. Regular Expressions 10. Files, Folders, and the Registry 11. Windows Management Instrumentation 12. Working with HTML, XML, and JSON 13. Web Requests and Web Services 14. Remoting and Remote Management 15. Asynchronous Processing 16. Graphical User Interfaces 17. Scripts, Functions, and Script Blocks 18. Parameters, Validation, and Dynamic Parameters 19. Classes and Enumerations 20. Building Modules 21. Testing 22. Error Handling 23. Debugging and Troubleshooting 24. Other Books You May Enjoy
25. Index

Testing with Pester

Pester is a framework for executing tests. It includes tools to define and execute test cases against anything that can be written in PowerShell.

This chapter focuses on Pester 5, the latest major release. Pester 5 is not installed by default; Windows ships with Pester 3.4. This pre-installed version can be ignored:

Install-Module Pester -Force -SkipPublisherCheck

The -SkipPublisherCheck parameter is required as Pester has changed maintainer since the version shipped with Windows was released. The certificate issued to the pre-installed version differs from the certificate issued to the current version.

You can use Pester to write tests for code and systems and everything in between. Pester is implemented as what is known as a Domain-Specific Language. It has specific functions that are implemented to behave like language keywords. For example, function is a language-specific keyword. Pester tests are written using PowerShell, but for the...

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