Migrates to Pester5+ tests (#59)

#### 📖 Summary

- update Pester tests to Pester5+ compatiple layout
- switch to dotnet base imaged
  - dotnet binary required for publishung powershell modules (Publish-Module)

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

- [x] Tested via Drone.io pipeline
- [ ] Custom test
- [ ] No test plan

##### Details / Justification

<!-- Add your test details or justification for missing tests here. -->

#### 📚 Additional Notes

<!-- A place for additional detail notes. -->

Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: #59

tools/DroneIO.psm1

@@ -80,6 +80,35 @@ function Invoke-InstallDependencies {
     }
 }
 
+
+function Start-PSScriptAnalyzer {
+    [CmdletBinding()]
+    [Diagnostics.CodeAnalysis.SuppressMessageAttribute(
+        'PSUseShouldProcessForStateChangingFunctions',
+        '',
+        Justification = 'justification'
+    )]
+    [Diagnostics.CodeAnalysis.SuppressMessageAttribute(
+        'PSProvideCommentHelp',
+        '',
+        Justification = 'internal function'
+    )]
+    param ()
+
+    process {
+        $AnalyzerSettings = @{
+            Path          = './src/'
+            Recurse       = $true
+            Settings      = './tools/PSScriptAnalyzerSettings.psd1'
+            ReportSummary = $true
+            ErrorAction   = 'Stop'
+        }
+        $AnalyzerResults = Invoke-ScriptAnalyzer @AnalyzerSettings
+        if ( $AnalyzerResults ) {
+            Write-Output -InputObject $AnalyzerResults
+        }
+    }
+}
 function Invoke-Linter {
     [CmdletBinding()]
     [Diagnostics.CodeAnalysis.SuppressMessageAttribute(
@@ -90,16 +119,20 @@ function Invoke-Linter {
     param ()
 
     process {
-        Import-Module -Name PSScriptAnalyzer
-        $AnalyzerSettings = @{
-            Path          = './src/'
-            Recurse       = $true
-            Settings      = './tools/PSScriptAnalyzerSettings.psd1'
-            ReportSummary = $true
-            ErrorAction   = 'Stop'
-        }
         try {
-            $AnalyzerResults = Invoke-ScriptAnalyzer @AnalyzerSettings
+            $AnalyzerResults = Start-PSScriptAnalyzer
+        }
+        catch {
+            Write-Debug -Message $_.Exception.Message -Debug
+            if ($_.Exception.Message -match 'Object reference not set') {
+                Write-Debug -Message 'ReRun PSScriptAnalyzer' -Debug
+                $AnalyzerResults = Start-PSScriptAnalyzer
+            }
+            else {
+                Write-Error -Message 'PSScriptAnalyzer failer'
+            }
+        }
+        finally {
             if ( $AnalyzerResults ) {
                 $AnalyzerResults | Sort-Object -Property @(
                     "ScriptName",
@@ -111,12 +144,10 @@ function Invoke-Linter {
                     "RuleName",
                     "Message"
                 ) -AutoSize | Out-String | Write-Verbose -Verbose
+                Update-BuildStateFile
+                throw 'PS Script Analyzer failed!'
             }
         }
-        catch {
-            Write-Debug -Message $_.Exception.Message -Debug
-            Write-Error -Message 'PSScriptAnalyzer failer'
-        }
     }
 }
 
@@ -171,8 +202,49 @@ function Invoke-UnitTest {
             $PesterConf.Filter.ExcludeTag = $ExcludeTag
         }
         $TestResults = Invoke-Pester -Configuration $PesterConf -ErrorAction 'Stop'
+
+        if ($TestResults.FailedCount -gt 0) {
+            Update-BuildStateFile
+            throw ('{0} tests failed!' -f $TestResults.FailedCount)
+        }
+
         if ($PassThru.IsPresent) {
             Write-Output -InputObject $TestResults
         }
     }
 }
+
+function Update-BuildStateFile {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $false)]
+        [ValidateNotNullOrEmpty()]
+        [string]$StepName = $Env:DRONE_FAILED_STEPS
+    )
+
+    process {
+        $StateFilePath = Join-Path -Path $PWD -ChildPath './STATE.xml'
+        if (Test-Path -Path $StateFilePath) {
+            $StateContent = Import-Clixml -Path $StateFilePath
+            $StateContent.Steps += $StepName
+        }
+        else {
+            $StateContent = [PSCustomObject]@{
+                Steps = @($StepName)
+            }
+        }
+        Export-Clixml -Path $StateFilePath -InputObject $StateContent -Force -Encoding utf8NoBOM
+    }
+}
+
+function Invoke-BuildState {
+    [CmdletBinding()]
+    param ()
+
+    process {
+        $StateFilePath = Join-Path -Path $PWD -ChildPath './STATE.xml'
+        if ( Test-Path -Path $StateFilePath ) {
+            throw 'One one more pipeline steps failed. Marking the pipeline as failed!'
+        }
+    }
+}