Everyone scripts in their own way. For example, do you put the '{' after the keyword, or on the next line? Is there help provided with your functions? Does a module manifest comply with your (company) standards? Let me show you how you can use Pester and PSScriptAnalyzer to help you write excellent scripts and help you and your colleagues evolve to deliver scripts that have one look-and-feel... without having to change the way YOU script.

3. Mark Nash
Graduate Engineer at
DevOpsGuys
Ed Dipple
Senior Engineer at
DevOpsGuys

6. Plone conference 2007, Naples

15. $testFiles = Get-Item ".src*.Tests.ps1"
Invoke-Pester -Path $testFiles

16. Describing Dependency checking
Context Windows
[+] Should be able to add to the PATH variable 1.87s
Context Unix
[+] Should be able to add to the PATH variable 185ms
Context Mono is not installed
[+] Should throw exception if Mono not installed on Unix 186ms
[+] Should not throw exception if Mono not installed on Windows
125ms

22. Powershell Class
Create a fake
WebClient

23. Inline C# code
Import the FakeWebClient2 Class

24. # Call your function that uses the mock
1 -Scope It
}

27. $testFiles = Get-Item ".src*.tests.ps1"
Invoke-Pester -Path $testFiles
-OutputFormat NUnitXML
-OutputFile TestResults.xml

28. $testFiles = Get-Item ".src*.tests.ps1"
$sourceFiles = Get-Item ".src*.ps1" –Exclude *.Tests.ps1
Invoke-Pester -Path $testFiles
-CodeCoverage $sourceFiles
-CodeCoverageOutputFile coverage.xml

30. Unit Tests Functional Tests
• Test for expected output
values and exceptions
• Mock all commands that
change machine state
• Assert that mocks have
been called the
expected number of
times
• Test for actual state
change
• Minimal usage of Mock
objects
• Use TestDrive to isolate
state changes where
possible

33. Invoke-ScriptAnalyzer "./src"
Invoke-ScriptAnalyzer "./src" -Recurse

35. Get-ScriptAnalyzerRule

43. Describe 'PSScriptAnalyzer analysis' {
$ScriptAnalyzerResults = Invoke-ScriptAnalyzer
-Path "*.ps1"
-Severity Warning
It 'Should not return any violation' {
$ScriptAnalyzerResults | Should BeNullOrEmpty
}
}

44. https://github.com/MathieuBuisson/PowerShell-DevOps/

48. https://github.com/devopsguys/PSForge
https://github.com/devopsguys/FutureDecoded
https://blogs.technet.microsoft.com/heyscriptingguy/2015/12/16/unit-testing-
powershell-code-with-pester/
https://blogs.technet.microsoft.com/heyscriptingguy/2017/01/31/psscriptanaly
zer-deep-dive-part-1-of-4/