Pester provides a framework for running BDD style Tests to execute and validate PowerShell commands inside of PowerShell and offers a powerful set of Mocking Functions that allow tests to mimic and mock the functionality of any. Here’s the content of the file archive, followed by details on the “helper” files. There is a newer version of this package available. You might want to review the preamble to each of the test files ( *.Tests.ps1) to see a couple different use cases for loading corresponding source.
#Check pester version archive#
Within the archive are two main folders: one contains code that needs to be installed within the Pester installation itself (ContextHelper.ps1) and the other contains a simple but real-world PowerShell module ( PesterArticleSample) that contains the module source code ( GetSafeProperty.ps1 and ProjectFileConsistency.ps1), the module infrastructure ( PesterArticleSample.psm1 and PesterArticleSample.psd1), helper functions ( TestHelpers folder) and unit tests for all the code. Attached to this article is a file archive that contains the helper functions discussed herein, along with some sample source and test files so you can see how I have used Pester for some real-world code.
#Check pester version series#
This series has described a variety of tweaks and techniques to streamline your work with Pester.
You cannot use Should to validate array data. In the current example, we use AreArraysEqual for this purpose.įinally, let us return to the example from part 2, wherein we tested the Get-TextFileNames function, and correct a hidden problem lurking in the shadows. Verify the number of times a command was. Verify that specific commands were (or were not) called. Mock the behavior of ANY powershell command. So you can use any arbitrary logic you like, so long as it returns a Boolean. r nuget: Pester, 5.2.2 How do you use mock In pester Mocking with Pester. But looking at the ParameterFilter from a broader perspective, it is just a script block that evaluates to a Boolean value. With arrays, though, you cannot specify a simple Boolean predicate to test an array for equality to some other array. By importing the module, we can double check that the Pester module is being snagged from the correct location. Let’s check to make sure it’s in the OneDrive location, which is the location of my CurrentUser scope. Practical PowerShell Unit-Testing: Checking program flow - Simple Talk Skip to contentĪssert-MockCalled ReportMissing 1 ). The final try succeeded and Pester version 3.4.3 (the latest at this time) is now installed.
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