Test PowerShell Preview in CI

Since the Daily no longer exists.

Author: andyleejordan

.github/workflows/ci-test.yml

@@ -43,12 +43,31 @@ jobs:
         shell: pwsh
 
       - name: Test Windows PowerShell
+        if: matrix.os == 'windows-latest'
         run: |
            Install-Module Pester -Scope CurrentUser -Force -SkipPublisherCheck
            ./build.ps1 -Test
-        if: matrix.os == 'windows-latest'
         shell: powershell
 
+      - name: Download PowerShell install script
+        uses: actions/checkout@v4
+        with:
+          repository: PowerShell/PowerShell
+          path: pwsh
+          sparse-checkout: tools/install-powershell.ps1
+          sparse-checkout-cone-mode: false
+
+      - name: Install preview
+        continue-on-error: true
+        run: ./pwsh/tools/install-powershell.ps1 -Preview -Destination ./preview
+        shell: pwsh
+
+      - name: Test preview
+        run: |
+          $PwshPreview = if ($isWindows) { "./preview/pwsh.exe" } else { "./preview/pwsh" }
+          ./build.ps1 -Test -WithPowerShell:$PwshPreview
+        shell: pwsh
+
       - name: Upload build artifacts
         uses: actions/upload-artifact@v4
         if: always()

build.ps1

@@ -32,6 +32,7 @@ param(
 
     [Parameter(ParameterSetName='Test')]
     [switch] $InProcess,
+    [string] $WithPowerShell,
 
     [Parameter(ParameterSetName='BuildAll')]
     [switch] $Catalog,
@@ -85,7 +86,7 @@ END {
             Start-CreatePackage
         }
         "Test" {
-            Test-ScriptAnalyzer -InProcess:$InProcess
+            Test-ScriptAnalyzer -InProcess:$InProcess -WithPowerShell:$WithPowerShell
             return
         }
         default {

build.psm1

@@ -308,7 +308,10 @@ function New-Catalog
 function Test-ScriptAnalyzer
 {
     [CmdletBinding()]
-    param ( [switch] $InProcess )
+    param (
+        [switch] $InProcess,
+        [string] $WithPowerShell
+    )
 
     END {
         # versions 3 and 4 don't understand versioned module paths, so we need to rename the directory of the version to
@@ -349,6 +352,9 @@ function Test-ScriptAnalyzer
             if ( $InProcess ) {
                 & $scriptBlock
             }
+            elseif ( $WithPowerShell ) {
+                & ${WithPowerShell} -Command $scriptBlock
+            }
             else {
                 $powershell = (Get-Process -id $PID).MainModule.FileName
                 & ${powershell} -NoProfile -Command $scriptBlock