Scriptblocks allow Pester to segment code, control how it’s run and more. Pester’s domain-specific language (DSL) is heavily reliant on PowerShell scriptblocks. Since they were both the same, the test passed. It then compared that output to the expected output of Working!.
On the second round, Pester dot sourced the Install-Pester function again, ran it and this time captured the output of Working!.Since the test was expecting $true to be $false, it failed. Pester then executed that function inside of the test (doing nothing at all the first time) and then compared the boolean value $true with the boolean value $false.When the 1 test script was run, it dot sourced the Install-Pester.ps1 script so that Pester could run the Install-Pester function inside.Once Invoke-Pester found all of the scripts, it then ran each one (in this case, a single one).When Invoke-Pester was run while inside of the C:\Pester101 directory, it looked for all scripts ending in.The 1 script held the tests to run against the code in Install-Pester.ps1. The Install-Pester.ps1 script represented the code to test.You created two files Install-Pester.ps1 and 1 in the C:\Pester101 directory.You’ve now successfully gone through all there is to create and run tests in Pester, but how did that work anyway? Notice now that your test has passed indicated by the and green text. Below is some code to get that done for you. Create a folder called Pester101 somewhere, a PS1 script called Pester101.ps1 and an associated test script file called 1. To build a Pester test, you need, at a minimum, two files: a PS1 script which contains code to test and a test script file. Don’t worry, though, creating a simple test is straightforward. However, this command is now considered legacy and will be removed from future versions Pester. Pester provides a command called New-Fixture that scaffolds out a single PowerShell script and test file to work with. In your PowerShell console with Pester installed, you can quickly create a simple project. You can also right-click the file, and select Properties from Windows Explorer to find an Unblock button.
#MEANING PESTER ZIP FILE#
If so, use the Unblock-File command to unblock the ZIP file before extracting it. You can look at this environment variable by running $env:PSModulePath.Īlso, when you download Pester, your browser might mark the downloaded ZIP file as potentially unsafe. When you extract the ZIP file, Pester will need to be in your C:\Program Files\WindowsPowerShell\Modules folder or any other folder in your’PSModulePath’ environment variable.
If not, head to the project’s GitHub page to download it as a ZIP file.
#MEANING PESTER INSTALL#
If you have the PowerShell Package Manager installed, you can use the Install-Module command to install Pester. Pester currently works back to PowerShell v2.
#MEANING PESTER WINDOWS 10#
Pester is preinstalled on Windows 10 and later, and on Windows Server 2016 or later.
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