Beyond Pester 103 : Applying a testing mindset

Pester is a great tool. You’ve probably used it for unit and acceptance testing, but you feel there’s something missing; How much more is there to testing? Is it just making sure my script works? It’s time to look at how testing can be used in everything (well almost everything…) you do!

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1. Beyond Pester 103 @glennsarti glenn-sarti Applying a testing mindset to PowerShell Glenn Sarti - Senior Software Engineer at
2. Beyond Pester 101 Applying testing principles to PowerShell Glenn Sarti Software Engineer, Windows Team
3. @glennsarti To reduce the risk that a user will experience an unexpected behaviour
4. @glennsarti Unit (White box) Integration Unit (Black box) Characterisation
5. @glennsarti Reduce duration Remove tests Reorder tests General maintenance
6. Beyond Pester 102 Acceptance testing with PowerShell @glennsarti glenn-sarti
7. @glennsarti Cynefin Framework “The Cynefin framework (/ˈkʌnɪvɪn/ KUN-iv-in) is a conceptual framework used to aid decision-making” - https://www.youtube.com/watch?v=N7oz366X0-8
8. @glennsarti Operational Acceptance Tests Operation Validation Tests User Acceptance Tests Compliance Acceptance Tests
9. @glennsarti Operational Acceptance Tests Operation Validation Tests User Acceptance Tests Compliance Acceptance Tests
10. @glennsarti ? @glennsarti
11. Designing automated test suites About 60% automation testing and 40% manual Contribute towards maintaining regression suite Ability to write clear and concise test/bug reports Review and analyze system specifications Regression testing, reporting @glennsarti
12. Designing automated test suites About 60% automation testing and 40% manual Contribute towards maintaining regression suite Ability to write clear and concise test/bug reports Review and analyze system specifications Regression testing, reporting @glennsarti
13. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
14. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
15. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
16. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
17. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
18. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
19. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
20. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
21. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
22. Wanted: Testing Mindset Creative Thinker Problem Solver Explorer / Experimenter @glennsarti
23. @glennsarti
24. @glennsarti
25. @glennsarti Testing is one of the most profitable investments engineers can make to improve the reliability of their product. Testing isn’t an activity that happens once or twice in the lifecycle of a project; it’s continuous. ” “ - https://sre.google/sre-book/testing-reliability/
26. @glennsarti “Shifting left” is about building quality into the software development process. When you shift left, fewer things break in production, because any issues are detected and resolved earlier. - Puppet State of DevOps Report 2016
27. @glennsarti ? @glennsarti
28. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
29. @glennsarti @glennsarti Param ( $ScriptPath = "C:\Automation\AD\Cleanup\", $LogDirectory = "logfiles\", $Date = (Get-Date).ToString("dd-MM-yyyy"), $NamedExceptions = (Get-Content $ScriptPath`ADnamedExceptions.txt), $Server = "DC002.domain.com" ) Function Get-AgedAccounts { Param ( [string]$AccountType, [int]$AgedAccountThreshold, [int]$NewAccountThreshold ) $LastLogonDate = (Get-Date).AddDays(-$AgedAccountThreshold) $WhenCreated = (Get-Date).AddDays(-$NewAccountThreshold) If ($AccountType -eq "User") { $AgedAccounts = Get-ADUser -Filter { (enabled -eq $True -and PasswordNeverExpires -eq $False -and WhenCreated -lt $WhenCreated -and samAccountType -eq "805306368") -and ((LastLogonDate -lt $LastLogonDate) -or (LastLogonDate -notlike "*")) } -Properties lastLogonDate,whenCreated,passWordLastSet,whenChanged -Server $server | Select-Object -Properties distinguishedName,samAccountName,lastLogonDate,whenCreated,passWordLastSet,whenChanged,objectClass $AgedAccounts } ElseIf ($AccountType -eq "Computer") { $AgedAccounts = Get-ADComputer -Filter { (enabled -eq $True -and PasswordNeverExpires -eq $False -and WhenCreated -lt $WhenCreated -and samAccountType -eq "805306369") -and ((LastLogonDate -lt $LastLogonDate) -or (LastLogonDate -notlike "*")) } -Properties lastLogonDate,whenCreated,passWordLastSet,whenChanged -Server $server | Select-Object -Property distinguishedName,samAccountName,lastLogonDate,whenCreated,passWordLastSet,whenChanged,objectClass $AgedAccounts } Else { $AgedAccounts } } Function Get-DisabledAccounts { Param ( [string]$AccountType, [int]$LastModifiedThreshold ) $LastModifiedDate = (Get-Date).AddDays(-$LastModifiedThreshold) If ($AccountType -eq "User") { $DisabledAccounts = Get-ADUser -Filter { enabled -eq $False -and samAccountType -eq "805306368" -and whenChanged -lt $LastModifiedDate } -properties lastLogonDate,whenCreated,passWordLastSet,whenChanged -server $server | Select-Object -Property distinguishedName,samAccountName,lastLogonDate,whenCreated,passWordLastSet,whenChanged,objectClass $DisabledAccounts } ElseIf ($AccountType -eq "Computer") { $DisabledAccounts = Get-ADComputer -Filter { enabled -eq $False -and samAccountType -eq "805306369" -and whenChanged -lt $LastModifiedDate } -properties lastLogonDate,whenCreated,passWordLastSet,whenChanged -server $server | Select-Object -Property distinguishedName,samAccountName,lastLogonDate,whenCreated,passWordLastSet,whenChanged,objectClass $DisabledAccounts } Else { $DisabledAccounts } } $AgedAccounts = $null $AgedAccounts = Get-AgedAccounts User 45 21 $AgedAccounts += Get-AgedAccounts Computer 45 14 $AgedAccounts.Count $DisabledAccounts = $null $DisabledAccounts = Get-DisabledAccounts Computer 183 # $DisabledAccounts += Get-DisabledAccounts User 183 $DisabledAccounts.Count ForEach ($AgedAccount in $AgedAccounts) { If ($NamedExceptions -contains $AgedAccount.DistinguishedName) { $Result = "Match found in named exceptions file" } Else { Disable-ADAccount $AgedAccount.DistinguishedName -Server $Server # -WhatIf $Result = $? } Add-Member -InputObject $AgedAccount -MemberType NoteProperty ` -Name ScriptDisabled -Value $Result } $LogFile = $Date + "disabled accounts.csv" $AgedAccounts | Export-Csv $ScriptPath$LogDirectory$LogFile -NoTypeInformation ForEach ($DisabledAccount in $DisabledAccounts) { If ($NamedExceptions -contains $DisabledAccount.DistinguishedName) { $Result = "Match found in named exceptions file" } Else { Remove-ADObject $DisabledAccount.DistinguishedName -Server $Server -Confirm:$False -Recursive # -WhatIf $Result = $? } Add-Member -InputObject $DisabledAccount -MemberType NoteProperty -Name ScriptDeleted -Value $Result } $LogFile = $Date + "-deleted accounts.csv" $DisabledAccounts | Export-Csv $ScriptPath$LogDirectory$LogFile -NoTypeInformation
30. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
31. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
32. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
33. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
34. @glennsarti Single Responsibility Principle @glennsarti
35. @glennsarti • Find accounts that haven’t logged in for 45 days • Exclude some accounts • Disable the accounts • Log the results to a file @glennsarti
36. @glennsarti @glennsarti Get-OldAccount | Skip-ExcludedAccounts | Disable-Account | Out-AuditFile
37. @glennsarti @glennsarti Get-OldAccount -OlderThanDays 45 | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Disable-Account | Out-AuditFile -Path $AuditFileCSV
38. @glennsarti @glennsarti Describe "Get-OldAccounts" { BeforeEach { $OldUserName1 = "Jasper" $OldUserName2 = "Tomato" $NotStaleUserName = "Pinapple" Function New-MockUser($Name, $Age) { # Insert mocking code here } New-MockUser $OldUserName1 46 New-MockUser $OldUserName2 100 New-MockUser $NotStaleUserName 45 } It "only returns old accounts" { $Actual = Get-OldAccounts -OlderThanDays 45 $Actual | Should-Be @($OldUserName1, $OldUserName2) } }
39. @glennsarti @glennsarti Describe "Get-OldAccounts" { BeforeEach { $OldUserName1 = "Jasper" $OldUserName2 = "Tomato" $NotStaleUserName = "Pinapple" Function New-MockUser($Name, $Age) { # Insert mocking code here } New-MockUser $OldUserName1 46 New-MockUser $OldUserName2 100 New-MockUser $NotStaleUserName 45 } It "only returns old accounts" { $Actual = Get-OldAccounts -OlderThanDays 45 $Actual | Should-Be @($OldUserName1, $OldUserName2) } } Old accounts Not old account
40. @glennsarti @glennsarti Describe "Get-OldAccounts" { BeforeEach { $OldUserName1 = "Jasper" $OldUserName2 = "Tomato" $NotStaleUserName = "Pinapple" Function New-MockUser($Name, $Age) { # Insert mocking code here } New-MockUser $OldUserName1 46 New-MockUser $OldUserName2 100 New-MockUser $NotStaleUserName 45 } It "only returns old accounts" { $Actual = Get-OldAccounts -OlderThanDays 45 $Actual | Should-Be @($OldUserName1, $OldUserName2) } }
41. @glennsarti @glennsarti Get-OldAccount ` -OlderThanDays 45 | Skip-ExcludedAccounts ` -Exclude $IgnoreAccounts | Disable-Account | Out-AuditFile -Path $AuditFileCSV $AgedAccounts = $null $AgedAccounts = Get-AgedAccounts User 45 # ... ForEach ($AgedAccount in $AgedAccounts) { If ($NamedExceptions -contains $AgedAccount.DistinguishedName) { $Result = "Match found in named exceptions file" } Else { Disable-ADAccount $AgedAccount.DistinguishedName ` -Server $Server $Result = $? } Add-Member -InputObject $AgedAccount -MemberType NoteProperty ` -Name ScriptDisabled -Value $Result } $LogFile = $Date + "disabled accounts.csv" $AgedAccounts | Export-Csv $ScriptPath$LogDirectory$LogFile -NoTypeInformation Before After
42. @glennsarti • Find accounts that were disabled 6 months ago • Exclude some accounts • Delete the accounts • Log the results to a file @glennsarti
43. @glennsarti @glennsarti Get-OldAccount -OlderThanDays 45 | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Disable-Account | Out-AuditFile -Path $AuditFileCSV Get-DisabledAccount -OlderThanDays 180 | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Remove-Account | Out-AuditFile -Path $AuditFileCSV
44. @glennsarti Avoid Implicit Dependencies @glennsarti
45. @glennsarti @glennsarti Function Get-AgedAccounts { Param ( [string]$AccountType, [int]$AgedAccountThreshold, [int]$NewAccountThreshold ) $LastLogonDate = (Get-Date).AddDays(-$AgedAccountThreshold) $WhenCreated = (Get-Date).AddDays(-$NewAccountThreshold) If ($AccountType -eq "User") { $AgedAccounts = Get-ADUser -Filter { (enabled -eq $True -and PasswordNeverExpires -eq $False -and WhenCreated -lt $WhenCreated –and …
46. @glennsarti @glennsarti Function Get-AgedAccounts { Param ( [string]$AccountType, [int]$AgedAccountThreshold, [int]$NewAccountThreshold ) $LastLogonDate = (Get-Date).AddDays(-$AgedAccountThreshold) $WhenCreated = (Get-Date).AddDays(-$NewAccountThreshold) If ($AccountType -eq "User") { $AgedAccounts = Get-ADUser -Filter { (enabled -eq $True -and PasswordNeverExpires -eq $False -and WhenCreated -lt $WhenCreated –and …
47. @glennsarti @glennsarti Function Get-AgedAccounts { Param ( [string]$AccountType, [int]$AgedAccountThreshold, [int]$NewAccountThreshold ) $LastLogonDate = (Get-Date).AddDays(-$AgedAccountThreshold) $WhenCreated = (Get-Date).AddDays(-$NewAccountThreshold) If ($AccountType -eq "User") { $AgedAccounts = Get-ADUser -Filter { (enabled -eq $True -and PasswordNeverExpires -eq $False -and WhenCreated -lt $WhenCreated –and …
48. @glennsarti @glennsarti Function Get-AgedAccounts { Param ( [string]$AccountType, [int]$AgedAccountThreshold, [DateTime]$CreatedAfter ) $LastLogonDate = (Get-Date).AddDays(-$AgedAccountThreshold) If ($AccountType -eq "User") { $AgedAccounts = Get-ADUser -Filter { (enabled -eq $True -and PasswordNeverExpires -eq $False -and WhenCreated -ge $CreatedAfter –and …
49. @glennsarti @glennsarti Get-OldAccount -OlderThanDays 45 | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Disable-Account | Out-AuditFile -Path $AuditFileCSV Get-DisabledAccount -OlderThanDays 180 | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Remove-Account | Out-AuditFile -Path $AuditFileCSV
50. @glennsarti @glennsarti $DisableTime = (Get-Date).AddDays(-45) $RemoveTime = (Get-Date).AddMonths(-6) Get-OldAccount -OlderThan $DisableTime | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Disable-Account | Out-AuditFile -Path $AuditFileCSV Get-DisabledAccount -OlderThan $RemoveTime | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Remove-Account | Out-AuditFile -Path $AuditFileCSV
51. @glennsarti Types of tests – Unit (Black box) “Tools do one thing … Tools don’t know where their input data has generated … Tools accept all input only from their parameters … Tools don’t know how their output will be used, “ - The Many Forms of Scripting: which to use - Manning @glennsarti
52. @glennsarti Why is testing hard? @glennsarti
53. @glennsarti @glennsarti
54. @glennsarti TDD @glennsarti
55. @glennsarti @glennsarti …here’s another one: TDD (Test-driven development) … why not write down what your trying to accomplish in the form of tests … Make sure all of those tests fail and then write PowerShell code to accomplish the necessary tasks until all of the tests pass. - https://mikefrobbins.com/2014/10/09/using-pester-for-test-driven-development-in-powershell/
56. @glennsarti @glennsarti - https://sqldbawithabeard.com/2017/06/30/creating-a-powershell-module-and-tdd-for-get-sqldiagrecommendations/ I approached writing this module using Test Driven Development with Pester. This means that I have to write my tests before I write my code.
57. @glennsarti TDD anyone? @glennsarti
58. @glennsarti 1. Add a test 2. It should fail 3. Write the code 4. Tests should pass @glennsarti - https://en.wikipedia.org/wiki/Test-driven_development
59. @glennsarti 1. Add a test 2. It should fail 3. Write the code 4. Tests should pass 5. Refactor 6. Repeat @glennsarti - https://en.wikipedia.org/wiki/Test-driven_development
60. @glennsarti 1. Add a test 2. It should fail 3. Write the code 4. Tests should pass 5. Refactor 6. Repeat @glennsarti - https://en.wikipedia.org/wiki/Test-driven_development Iterate
61. @glennsarti 1. Add a test 2. It should fail 3. Write the code 4. Tests should pass 5. Refactor 6. Repeat @glennsarti - https://en.wikipedia.org/wiki/Test-driven_development Always adding quality
62. @glennsarti 1. Add a test 2. It should fail 3. Write the code 4. Tests should pass 5. Refactor 6. Repeat @glennsarti - https://en.wikipedia.org/wiki/Test-driven_development Focus on requirements
63. @glennsarti 1. Add a test 2. It should fail 3. Write the code 4. Tests should pass 5. Refactor 6. Repeat @glennsarti - https://en.wikipedia.org/wiki/Test-driven_development Small QoL things
64. @glennsarti @glennsarti ❌ Code before tests ❌ Blocking work ❌ The end state TDD is not
65. @glennsarti @glennsarti ✅ Fast feedback loops ✅ Focus on requirements ✅ A high confidence change tool TDD is
66. @glennsarti @glennsarti … we are 100% capable of doing TDD with Powershell, No Excuses! … It’s that simple, and it’s a beautiful thing. - https://devingleasonlambert.medium.com/test-driven-development-by-example-using-powershell-what-is-tdd-9a5006c9931 - Devin Gleason-Lambert
67. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
68. @glennsarti Describe "Get-OldAccounts" { BeforeEach { $OldUserName1 = "Jasper" $OldUserName2 = "Tomato" $NotStaleUserName = "Pinapple" Function New-MockUser($Name, $Age) { # Insert mocking code here } New-MockUser $OldUserName1 46 New-MockUser $OldUserName2 100 New-MockUser $NotStaleUserName 45 } It "only returns old accounts" { $Actual = Get-OldAccounts -OlderThanDays 45 $Actual | Should-Be @($OldUserName1, $OldUserName2) } }
69. @glennsarti $DisableTime = (Get-Date).AddDays(-45) $RemoveTime = (Get-Date).AddMonths(-6) Get-OldAccount -OlderThan $DisableTime | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Disable-Account | Out-AuditFile -Path $AuditFileCSV Get-DisabledAccount -OlderThan $RemoveTime | Skip-ExcludedAccounts -Exclude $IgnoreAccounts | Remove-Account | Out-AuditFile -Path $AuditFileCSV
70. @glennsarti @glennsarti AD Account Cleanup Script • Disable accounts that haven’t logged in for 45 days • Delete disabled accounts after 6 months • Be able to exclude some accounts • Log all activities
71. @glennsarti @glennsarti TDD for everyone
72. @glennsarti TDD for everyone @glennsarti “The code is more what you’d call ‘guidelines’ than actual rules.” - Captain Barbosa – Pirates of the Caribbean
73. @glennsarti Q: Where to start? @glennsarti
74. @glennsarti Q: Where to start? A: It depends 😕 @glennsarti
75. @glennsarti 1. Happy path 2. Sad path 3. Weird 💩 path @glennsarti
76. @glennsarti A software tester walks into a bar ... Orders a beer Orders ten beers Orders a nothing Orders 200 beers Tries to leave without paying Orders -1 beers Orders a cat @glennsarti
77. @glennsarti @glennsarti Happy Sad Weird A software tester walks into a bar ... Orders a beer Orders ten beers Orders a nothing Orders 200 beers Tries to leave without paying Orders -1 beers Orders a cat
78. @glennsarti AD Cleanup script – Get old Accounts An account logged in 46 days ago An account logged in 45 days ago @glennsarti Happy
79. @glennsarti AD Cleanup script – Get old Accounts An account logged in 46 days ago An account logged in 45 days ago An account that’s never logged in Network error @glennsarti Happy Sad
80. @glennsarti AD Cleanup script – Get old Accounts An account logged in 46 days ago An account logged in 45 days ago An account that’s never logged in Network error An account logged in 1 day into the future @glennsarti Happy Sad Weird
81. @glennsarti AD Cleanup script – Get old Accounts An account logged in 46 days ago An account logged in 45 days ago An account that’s never logged in Network error An account logged in 1 day into the future @glennsarti Happy Sad Weird
82. @glennsarti @glennsarti “ If it hurts, do it more frequently, and bring the pain forward. “ - https://www.amazon.com.au/Continuous-Delivery-Reliable-Deployment-Automation/dp/0321601912 - Jez Humble
83. @glennsarti Operation Validation Framework - https://github.com/PowerShell/Operation-Validation-Framework A set of tools for executing validation of the operation of a system. It provides a way to organize and execute Pester tests which are written to validate operation … ” “ @glennsarti
84. @glennsarti
85. @glennsarti @glennsarti Tests are tools
86. @glennsarti @glennsarti Gherkin
87. @glennsarti @glennsarti Feature: It retrieves old accounts Background: Login to Test AD Given test AD server 'testad.local' And a user 'not_stale@example.com' which logged in 45 days ago And a user 'olduser1@example.com' which logged in 46 days ago And a user 'olduser2@example.com' which logged in 100 days ago Scenario: Getting many accounts When getting accounts older than 45 days Then it returns user 'olduser1@example.com' And it returns user 'olduser2@example.com' And it does not return user 'not_stale@example.com'
88. @glennsarti @glennsarti Compliance Testing
89. @glennsarti Metadata Test @glennsarti
90. @glennsarti @glennsarti Compliance Testing Open Policy Agent (OPA) HashiCorp Sentinel*
91. @glennsarti @glennsarti OPA – Conftest - Rego syntax
92. @glennsarti @glennsarti HashiCorp - Sentinel deny_unencrypted_managed_disk = rule when { all allManagedDisks as _, disks { all disks.change.after.encryption_settings as encryption_settings { encryption_settings.enabled is true } } }
93. @glennsarti @glennsarti Load Testing
94. @glennsarti @glennsarti package gatlingBlog import scala.concurrent.duration._ import io.gatling.core.Predef._ import io.gatling.http.Predef._ class SartiDevSimulation1 extends Simulation { val httpProtocol = http .baseUrl("https://sarti.dev") val scn = scenario("SendSimpleQuery") .exec( http("root_request") .get("/") ) setUp(scn.inject( atOnceUsers(100) ).protocols(httpProtocol)) }
95. @glennsarti @glennsarti package gatlingBlog import scala.concurrent.duration._ import io.gatling.core.Predef._ import io.gatling.http.Predef._ class SartiDevSimulation1 extends Simulation { val httpProtocol = http .baseUrl("https://sarti.dev") val scn = scenario("SendSimpleQuery") .exec( http("root_request") .get("/") ) setUp(scn.inject( atOnceUsers(100) ).protocols(httpProtocol)) } Request URL Load
96. @glennsarti @glennsarti
97. @glennsarti @glennsarti So many tools…
98. @glennsarti
99. … If it's truth you're interested in, Dr.Tyree's Philosophy class is right down the hall — Indiana Jones @glennsarti
100. @glennsarti
101. Does my PowerShell do what it should? @glennsarti
102. Does my PowerShell do what it should? How do I know my PowerShell does what it should? @glennsarti
103. THANK YOU! Please use the link below to submit a session rating! @glennsarti http://sarti.dev/ https://speakerdeck.com/glennsarti https://powershellsummit.org/sessionfeedback
104. @glennsarti Resources Beyond Pester https://sarti.dev/presentation/powershell-summit2018-pester https://sarti.dev/presentation/powershell-summit2019-pester DevOps https://www.amazon.com.au/Phoenix-Project-DevOps-Helping-Business/dp/0988262592 https://sre.google/sre-book/testing-reliability/ https://services.google.com/fh/files/misc/state-of-devops-2018.pdf https://www.amazon.com.au/Continuous-Delivery-Reliable-Deployment-Automation/dp/0321601912 TDD https://en.wikipedia.org/wiki/Test-driven_development https://mikefrobbins.com/2014/10/09/using-pester-for-test-driven-development-in-powershell/ https://sqldbawithabeard.com/2017/06/30/creating-a-powershell-module-and-tdd-for-get-sqldiagrecommendations/ https://devingleasonlambert.medium.com/test-driven-development-by-example-using-powershell-what-is-tdd-9a5006c9931 Images https://unsplash.com @glennsarti
105. @glennsarti Resources Doctor don’t Defenstrate https://www.youtube.com/watch?v=xu9dRXgmTNc Compliance https://www.conftest.dev/ https://www.hashicorp.com/sentinel @glennsarti