Add prerelease flow test case

Author: MariusStorhaug

.github/workflows/Action-Test.yml

@@ -478,3 +478,102 @@ jobs:
               $failed = $true
           }
           if ($failed) { exit 1 }
+
+  ActionTest-Prerelease:
+    name: Action-Test - [Prerelease]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Create fake PR event
+        shell: pwsh
+        run: |
+          $event = @{
+              pull_request = @{
+                  head   = @{ ref = 'feat/add-prerelease-support' }
+                  labels = @(
+                      @{ name = 'minor' }
+                  )
+              }
+          } | ConvertTo-Json -Depth 5
+          $event | Set-Content -Path "$env:RUNNER_TEMP/event.json"
+          "GITHUB_EVENT_PATH=$env:RUNNER_TEMP/event.json" | Out-File -FilePath $env:GITHUB_ENV -Append
+
+      - name: Resolve-PSModuleVersion
+        id: resolve
+        uses: ./
+        env:
+          GH_TOKEN: ${{ github.token }}
+        with:
+          Settings: |
+            {
+              "Publish": {
+                "Module": {
+                  "ReleaseType": "Prerelease",
+                  "AutoPatching": false,
+                  "IncrementalPrerelease": true,
+                  "DatePrereleaseFormat": "",
+                  "VersionPrefix": "v",
+                  "MajorLabels": "major",
+                  "MinorLabels": "minor",
+                  "PatchLabels": "patch",
+                  "IgnoreLabels": ""
+                }
+              }
+            }
+          EventJson: '{"pull_request":{"head":{"ref":"feat/add-prerelease-support"},"labels":[{"name":"minor"}]}}'
+
+      - name: Verify - Prerelease
+        shell: pwsh
+        env:
+          RESOLVE_CREATE_RELEASE: ${{ steps.resolve.outputs.CreateRelease }}
+          RESOLVE_VERSION: ${{ steps.resolve.outputs.Version }}
+          RESOLVE_PRERELEASE: ${{ steps.resolve.outputs.Prerelease }}
+          RESOLVE_RELEASE_TYPE: ${{ steps.resolve.outputs.ReleaseType }}
+          RESOLVE_FULL_VERSION: ${{ steps.resolve.outputs.FullVersion }}
+        run: |
+          Write-Host '--- Input ---'
+          Write-Host "EventJson: {""pull_request"":{""head"":{""ref"":""feat/add-prerelease-support""},""labels"":[{""name"":""minor""}]}}"
+          Write-Host "Settings:  ReleaseType=Prerelease, AutoPatching=false, IncrementalPrerelease=true, MinorLabels=minor"
+          Write-Host ''
+          Write-Host '--- Expected vs Actual ---'
+          Write-Host "CreateRelease: expected='true'              actual='$env:RESOLVE_CREATE_RELEASE'"
+          Write-Host "ReleaseType:   expected='Prerelease'        actual='$env:RESOLVE_RELEASE_TYPE'"
+          Write-Host "Version:       expected='non-empty'         actual='$env:RESOLVE_VERSION'"
+          Write-Host "Prerelease:    expected='feataddprereleasesupport*' actual='$env:RESOLVE_PRERELEASE'"
+          Write-Host "FullVersion:                                actual='$env:RESOLVE_FULL_VERSION'"
+          Write-Host ''
+
+          $failed = $false
+          if ($env:RESOLVE_CREATE_RELEASE -ne 'true') {
+              Write-Error "CreateRelease: expected 'true', got '$env:RESOLVE_CREATE_RELEASE'"
+              $failed = $true
+          }
+          if ($env:RESOLVE_RELEASE_TYPE -ne 'Prerelease') {
+              Write-Error "ReleaseType: expected 'Prerelease', got '$env:RESOLVE_RELEASE_TYPE'"
+              $failed = $true
+          }
+          if ([string]::IsNullOrEmpty($env:RESOLVE_VERSION)) {
+              Write-Error "Version: expected non-empty, got empty"
+              $failed = $true
+          }
+          if ([string]::IsNullOrEmpty($env:RESOLVE_PRERELEASE)) {
+              Write-Error "Prerelease: expected non-empty (branch-derived tag), got empty"
+              $failed = $true
+          }
+          if ($env:RESOLVE_PRERELEASE -notlike 'feataddprereleasesupport*') {
+              Write-Error "Prerelease: expected to start with 'feataddprereleasesupport', got '$env:RESOLVE_PRERELEASE'"
+              $failed = $true
+          }
+          if ([string]::IsNullOrEmpty($env:RESOLVE_FULL_VERSION)) {
+              Write-Error "FullVersion: expected non-empty, got empty"
+              $failed = $true
+          }
+          if ($env:RESOLVE_FULL_VERSION -notlike '*-*') {
+              Write-Error "FullVersion: expected to contain '-' (prerelease separator), got '$env:RESOLVE_FULL_VERSION'"
+              $failed = $true
+          }
+          if ($failed) { exit 1 }