Skip PSScriptAnalyzer where it may be unsupported

See PowerShell/PSScriptAnalyzer#984

Author: mlocati

test/setup.ps1

@@ -9,19 +9,21 @@ If (-Not($nuget)) {
 }
 Write-Host " - NuGet version: $($nuget.Version.ToString())"
 
-$psScriptAnalyzer = Get-Module -Name PSScriptAnalyzer
-If (-Not($psScriptAnalyzer)) {
-    $psScriptAnalyzer = Get-Module -ListAvailable | Where-Object { $_.Name -eq 'PSScriptAnalyzer' }
-    If ($psScriptAnalyzer -is [array]) {
-        $psScriptAnalyzer = $psScriptAnalyzer[0]
-    }
-    If (-Not($psScriptAnalyzer)) {
-        Write-Host ' - installing PSScriptAnalyzer'
-        Install-Module -Name PSScriptAnalyzer -Force
-        $psScriptAnalyzer = Get-Module -ListAvailable | Where-Object { $_.Name -eq 'PSScriptAnalyzer' }
-    }
+If ($PSVersionTable.PSEdition -ne 'Core') {
+	$psScriptAnalyzer = Get-Module -Name PSScriptAnalyzer
+	If (-Not($psScriptAnalyzer)) {
+		$psScriptAnalyzer = Get-Module -ListAvailable | Where-Object { $_.Name -eq 'PSScriptAnalyzer' }
+		If ($psScriptAnalyzer -is [array]) {
+			$psScriptAnalyzer = $psScriptAnalyzer[0]
+		}
+		If (-Not($psScriptAnalyzer)) {
+			Write-Host ' - installing PSScriptAnalyzer'
+			Install-Module -Name PSScriptAnalyzer -Force
+			$psScriptAnalyzer = Get-Module -ListAvailable | Where-Object { $_.Name -eq 'PSScriptAnalyzer' }
+		}
+	}
+	Write-Host " - PSScriptAnalyzer version: $($psScriptAnalyzer.Version.ToString())"
 }
-Write-Host " - PSScriptAnalyzer version: $($psScriptAnalyzer.Version.ToString())"
 
 $pester = Get-Module -Name Pester | Where-Object { $_.Version -ge '4.3' }
 If (-Not($pester)) {

test/tests/Syntax.Tests.ps1

@@ -11,12 +11,14 @@ Describe 'Syntax' {
         $errors.Count | Should Be 0
     }
 
-    It -Name '<file> should pass PSScriptAnalyzer' -TestCases $testCases {
-        param($file)
-        $problems = @(Invoke-ScriptAnalyzer -Path $file.FullName -ExcludeRule PSUseShouldProcessForStateChangingFunctions -Severity Warning, Error)
-        If ($problems) {
-            $problems | Format-Table | Out-String | Write-Host
+    If ($PSVersionTable.PSEdition -ne 'Core') {
+        It -Name '<file> should pass PSScriptAnalyzer' -TestCases $testCases {
+            param($file)
+            $problems = @(Invoke-ScriptAnalyzer -Path $file.FullName -ExcludeRule PSUseShouldProcessForStateChangingFunctions -Severity Warning, Error)
+            If ($problems) {
+                $problems | Format-Table | Out-String | Write-Host
+            }
+            @($problems).Count | Should Be 0
         }
-        @($problems).Count | Should Be 0
     }
 }