Refactor: Centralize xUnit tests into reusable workflow and remove legacy verification (#26243)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: TravisEz13 <10873629+TravisEz13@users.noreply.github.com>

.github/workflows/linux-ci.yml

@@ -147,20 +147,15 @@ jobs:
         with:
           purpose: ElevatedPesterTests
           tagSet: Others
-  verify_xunit:
-    name: Verify xUnit test results
+  xunit_tests:
+    name: xUnit Tests
     needs:
-      - ci_build
       - changes
     if: ${{ needs.changes.outputs.source == 'true' }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 1000
-      - name: Verify xUnit test results
-        uses: "./.github/actions/test/verify_xunit"
+    uses: ./.github/workflows/xunit-tests.yml
+    with:
+      runner_os: ubuntu-latest
+      test_results_artifact_name: testResults-xunit
 
   analyze:
     permissions:
@@ -224,7 +219,7 @@ jobs:
   ready_to_merge:
     name: Linux ready to merge
     needs:
-      - verify_xunit
+      - xunit_tests
       - linux_test_elevated_ci
       - linux_test_elevated_others
       - linux_test_unelevated_ci

.github/workflows/macos-ci.yml

@@ -143,20 +143,15 @@ jobs:
         with:
           purpose: ElevatedPesterTests
           tagSet: Others
-  verify_xunit:
-    name: Verify xUnit test results
+  xunit_tests:
+    name: xUnit Tests
     needs:
-      - ci_build
       - changes
     if: ${{ needs.changes.outputs.source == 'true' }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 1000
-      - name: Verify xUnit test results
-        uses: "./.github/actions/test/verify_xunit"
+    uses: ./.github/workflows/xunit-tests.yml
+    with:
+      runner_os: macos-15-large
+      test_results_artifact_name: testResults-xunit
   PackageMac-macos_packaging:
     name: macOS packaging (bootstrap only)
     needs:
@@ -176,7 +171,7 @@ jobs:
   ready_to_merge:
     name: macos ready to merge
     needs:
-      - verify_xunit
+      - xunit_tests
       - PackageMac-macos_packaging
       - macos_test_elevated_ci
       - macos_test_elevated_others

.github/workflows/windows-ci.yml

@@ -147,20 +147,15 @@ jobs:
         with:
           purpose: ElevatedPesterTests
           tagSet: Others
-  verify_xunit:
-    name: Verify xUnit test results
+  xunit_tests:
+    name: xUnit Tests
     needs:
-      - ci_build
       - changes
     if: ${{ needs.changes.outputs.source == 'true' }}
-    runs-on: windows-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v5
-        with:
-          fetch-depth: 1000
-      - name: Verify xUnit test results
-        uses: "./.github/actions/test/verify_xunit"
+    uses: ./.github/workflows/xunit-tests.yml
+    with:
+      runner_os: windows-latest
+      test_results_artifact_name: testResults-xunit
   windows_packaging:
     name: Windows Packaging
     needs:
@@ -170,7 +165,7 @@ jobs:
   ready_to_merge:
     name: windows ready to merge
     needs:
-      - verify_xunit
+      - xunit_tests
       - windows_test_elevated_ci
       - windows_test_elevated_others
       - windows_test_unelevated_ci

.github/workflows/xunit-tests.yml

@@ -0,0 +1,53 @@
+name: xUnit Tests (Reusable)
+
+on:
+  workflow_call:
+    inputs:
+      runner_os:
+        description: 'Runner OS for xUnit tests'
+        type: string
+        required: false
+        default: ubuntu-latest
+      test_results_artifact_name:
+        description: 'Artifact name for xUnit test results directory'
+        type: string
+        required: false
+        default: testResults-xunit
+
+jobs:
+  xunit:
+    name: Run xUnit Tests
+    runs-on: ${{ inputs.runner_os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1000
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: ./global.json
+
+      - name: Bootstrap
+        shell: pwsh
+        run: |
+          Import-Module ./tools/ci.psm1
+          Invoke-CIInstall -SkipUser
+          Sync-PSTags -AddRemoteIfMissing
+
+      - name: Build PowerShell and run xUnit tests
+        shell: pwsh
+        run: |
+          Import-Module ./tools/ci.psm1
+          Start-PSBuild
+          Write-Host "Running full xUnit test suite (no skipping)..."
+          Invoke-CIxUnit
+          Write-Host "Completed xUnit test run."
+
+      - name: Upload xUnit results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: ${{ inputs.test_results_artifact_name }}
+          path: ${{ github.workspace }}/xUnitTestResults.xml