added Invoke-ChecklistRequirement unit tests

Context.psm1

@@ -10,9 +10,6 @@ $InformationPreference = "Continue"
 $LogContext = [Stack[string]]::new()
 
 
-Import-Module "Profile"
-
-
 
 $DockerLinePrefix = " ----->"
 

Requirements.Tests.ps1

@@ -0,0 +1,60 @@
+
+Import-Module Pester
+Import-Module .\Requirements
+
+
+Describe "Invoke-ChecklistRequirement" {
+
+    It "Should write to host correctly" {
+        # convert Host stream to array by writing to then reading from file
+        $tempFile = "$env:TEMP\$(New-Guid).out.txt"
+        try {
+            Invoke-ChecklistRequirement `
+                -Describe "Simple Requirement" `
+                -Test { $script:ValidRequirementHasRun } `
+                -Set { $script:ValidRequirementHasRun = $true } `
+                *> $tempFile
+            $output = Get-Content $tempFile
+            $loggedOutput = $output | ? {$_.Trim()}
+            $clearedOutput = $output | ? {-not $_.Trim()}
+            $loggedOutput | % {$_ | Should -Match "^\d\d:\d\d:\d\d \[ . \] Simple Requirement$"}
+            $clearedOutput.Count | Should -Be 1
+            $loggedOutput.Count | Should -Be 2
+        } finally {
+            Remove-Item $tempFile
+        }
+    }
+
+    It "Should not 'Set' if in desired state" {
+        $script:NotSetIfInDesiredState = 0
+        Invoke-ChecklistRequirement `
+            -Describe "Simple Requirement" `
+            -Test { $true } `
+            -Set { $script:NotSetIfInDesiredState++ } `
+            *> $null
+        $script:NotSetIfInDesiredState | Should -Be 0
+    }
+
+    It "Should 'Set' if in desired state" {
+        $script:SetIfInDesiredState = 0
+        Invoke-ChecklistRequirement `
+            -Describe "Simple Requirement" `
+            -Test {$script:SetIfInDesiredState -gt 0} `
+            -Set {$script:SetIfInDesiredState++} `
+            *> $null
+        $script:SetIfInDesiredState | Should -Be 1
+    }
+
+    It "Should validate once set" {
+        $script:TestOnceSetIsTestCount = 0
+        $script:TestOnceSetIsSet = $false
+        Invoke-ChecklistRequirement `
+            -Describe "Simple Requirement" `
+            -Test {$script:TestOnceSetIsTestCount += 1; $script:TestOnceSetIsSet} `
+            -Set {$script:TestOnceSetIsSet = $true} `
+            *> $null
+        $script:TestOnceSetIsSet | Should -Be $true
+        $script:TestOnceSetIsTestCount | Should -Be 2
+    }
+
+}