![]() ![]() Let’s now move on to lines 5-9, the Pester part of the script. "$here\$sut" simply combines the two variables and dot sources the function into the PowerShell session. Which makes sense because 1 is the function we are going to run tests against. In programming sut means system under test. So if the path is /home/duffney/temp/1 it will just return the end of it 1 That output is then passed to the -replace operator and. The -Leaf parameter indicates the Split-Path cmdlet should only return the last item in the path. It uses the same path $MyInvocation.M圜ommand.Path, but it used a different parameter -Leaf. Moving on to $sut, it is being populated by this code (Split-Path -Leaf $MyInvocation.M圜ommand.Path) -replace '\.Tests\.', '.'. In this case since my 1 is located at /home/duffney/temp, so that’s what $here will be populated with. Which is a fancy way of getting the current path of the script being executed. $here is being populated by Split-Path -Parent $MyInvocation.M圜ommand.Path. Notice that it’s creating two variables $here and $sut. $sut = (Split-Path -Leaf $MyInvocation.M圜ommand.Path) -replace '\.Tests\.', '.' $here = Split-Path -Parent $MyInvocation.M圜ommand.Path It’s a really simple function, but that will make it easier to understand how to write pester tests for it. These two parameters are used to create a folder, create a file and set the content of the new file. ![]() The New-PesterLab function now accepts two parameters $Path and $Name. Next, open the New-PesterLab.ps1 update the code to what is shown below. Sidenote: You don’t have to use the New-Fixture cmdlet, if you already have a function file you can just create the 1 by hand, but it won’t have any pester syntax in it. The other reason is by default Pester will run all. ![]() Once reason for that recommendation is it’s easy to keep track of what tests go with what function or script file. It’s highly recommended you follow the naming scheme FunctionName|1. New-PesterLab.ps1 and 1, New-PesterLab.ps1 is the PowerShell script for the function I’ll write and 1 is the PowerShell script for the Pester test I’ll write. The current version is 4.0.5, at least at the time of writing this blog post.Īfter you run the command you’ll notice two new files. However, like all modules and software for that matter updates are released so you’ll want to grab the latest versions. If you’re running Windows 10 or Windows Server 2016, you already have a copy of the Pester PowerShell module. Why not learn Pester and have the computer do the testing for you as well? Installing Pester To put it in perspective a little, you probably learned PowerShell so that you could automate and have the computer do things for you. That’s called testing the code and is exactly what Pester can do for you. You might think to yourself well what’s the point of that? I already wrote my PowerShell function, all I need to do now is run it and see if it does what I want. ![]() But, really all you need to know about it before getting started, is that it’s a testing framework and it can be used to automate the testing of your PowerShell code. The sound pieces and songs featured on the album explore the complex sounds and dynamics of the lullaby, variously manifested as whispered chants, fast-paced dialogues, layered, contrapuntal vocal lines, spoken and sung, jazz riffs and ASMR soundscapes, and playful, childlike songs.Pester is a PowerShell behavior-driven development (BDD) style testing framework. The album is accompanied by a book of poems by Holly. The album is a multimedia collaborative work developed by Holly throughout her residency with Hubbub - an international team of scientists, historians, artists and broadcasters based at the Wellcome Collection - materialising Holly’s interest in speech rhythms and patterns which are responsive to work and rest. Her book, Go to reception and ask for Sara in red felt tip is a collection of ‘archive fanfiction’ (Book Works 2015) and her album Common Rest (Test Centre 2016) is a collection of collaborative lullabies and sound poems. Her portfolio is a fascinating and eclectic mix of writing, music, sound poetry and theory. Holly has featured in readings, performances and sound installations in New York and London, and has been published in Poetry Review, Poetry London and the Believer. We’re delighted to welcome her to our line-up at the festival this year. Poet, researcher, multidisciplinary writer and lecturer, Holly is fascinated by sound and performance. This year’s festival is all about connecting poets and celebrating multidisciplinary poetry practices and performances, so Holly Pester is a perfect headliner for us. ![]()
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