Add tests to Windows build (#585)

The PR adds testing of the runner code on Windows, including communication with a Forgejo server running on WSL.

Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/585
Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org>
Co-authored-by: Crown0815 <felix.kroener@gmx.de>
Co-committed-by: Crown0815 <felix.kroener@gmx.de>

.github/workflows/build-release.yml

@@ -1,12 +1,17 @@
-# This workflow will build a Windows binary for each architecture and upload it as an artifact.
-# If the push is a tag, it will create a release with the binaries attached.
+# This workflow:
+#  - builds and uploads a binary artifact for each Windows architecture
+#  - tests the runner on Windows with a Forgejo server container running on Windows Subsystem for Linux (WSL)
+#  - releases the binary artifact (if triggered on a pushed tag)
+#
 # This build is currently supported on https://github.com/Crown0815/forgejo-runner-windows
 
-name: Build release
+name: Build Release
 
 on:
   push:
-    tags: 'v*'
+    tags: ['v*']
+    branches: [ main ]
+
 jobs:
   build:
     name: Build ${{matrix.architecture}}
@@ -28,9 +33,106 @@ jobs:
           name: forgejo-runner-windows-${{matrix.architecture}}
           path: forgejo-runner-windows-${{matrix.architecture}}.exe
 
+
+  test:
+    name: Run Tests on Windows with Linux Forgejo Server
+    runs-on: windows-latest
+    env:
+      FORGEJO_ROOT_URL: 'http://localhost:3000/'
+      FORGEJO_ADMIN_USER: 'admin_user'
+      FORGEJO_ADMIN_PASSWORD: 'admin_password'
+      FORGEJO_RUNNER_SECRET: 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
+      MAX_WAIT_ITERATIONS: 30
+
+    steps:
+      - name: Windows - Checkout code
+        uses: actions/checkout@v4
+
+      - name: Windows - Setup Windows Subsystem for Linux (WSL)
+        uses: Vampire/setup-wsl@v5
+        with:
+          distribution: Alpine
+          wsl-shell-user: root
+          additional-packages: bash
+
+      - name: WSL - Install Docker
+        shell: wsl-bash {0}
+        run: |
+          apk --update add --no-cache docker curl
+
+          rc-update add docker default
+          openrc default
+
+          # Wait for Docker to be ready
+          i=0
+          until docker info > /dev/null 2>&1 || (( i == ${{ env.MAX_WAIT_ITERATIONS }} )); do
+            echo "Waiting for Docker to be ready... ($(( ++i ))/${{ env.MAX_WAIT_ITERATIONS }})"
+            sleep 1
+          done
+          [ $i -lt ${{ env.MAX_WAIT_ITERATIONS }} ] && echo "Docker is ready!" || { echo "Timed out waiting for Docker" ; exit 1; }
+
+      - name: WSL - Start Forgejo Server
+        shell: wsl-bash {0}
+        run: |
+          docker run -d --name forgejo \
+            -p 3000:3000 \
+            -e USER_UID=1000 \
+            -e USER_GID=1000 \
+            -e FORGEJO__security__INSTALL_LOCK=true \
+            -e FORGEJO__server__DOMAIN=localhost \
+            -e FORGEJO__server__ROOT_URL=${{ env.FORGEJO_ROOT_URL }} \
+            codeberg.org/forgejo/forgejo:11.0-rootless
+
+      - name: Windows - Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Windows - Install dependencies
+        run: go mod download
+
+      - name: WSL - Register Runner on Forgejo Server
+        # Starting the Forgejo server takes some time.
+        # That time used to install go.
+        shell: wsl-bash {0}
+        run: |
+          i=0
+          until curl -s ${{ env.FORGEJO_ROOT_URL }}/api/v1/version > /dev/null || (( i == ${{ env.MAX_WAIT_ITERATIONS }} )); do
+            echo "Waiting for Forgejo to be ready... ($(( ++i ))/${{ env.MAX_WAIT_ITERATIONS }})"
+            sleep 1
+          done
+          [ $i -lt ${{ env.MAX_WAIT_ITERATIONS }} ] && echo "Forgejo is ready!" || { echo "Timed out waiting for Forgejo" ; exit 1; }
+
+          # Create admin user and generate runner token
+          docker exec forgejo forgejo admin user create --admin --username ${{ env.FORGEJO_ADMIN_USER }} --password ${{ env.FORGEJO_ADMIN_PASSWORD }} --email root@example.com
+          docker exec forgejo forgejo forgejo-cli actions register --labels docker --name therunner --secret ${{ env.FORGEJO_RUNNER_SECRET }}
+
+      - name: Windows - Connect to Forgejo server
+        run: |
+          $configFileContent = @"
+          log:
+            level: debug
+          runner:
+            labels:
+              - windows:host
+              - docker:docker://node:20
+          "@
+          Set-Content -Path temporaryConfig.yml -Value $configFileContent
+
+          # Register the runner
+          go run main.go create-runner-file --config temporaryConfig.yml --instance ${{ env.FORGEJO_ROOT_URL }} --secret ${{ env.FORGEJO_RUNNER_SECRET }} --name "windows-test-runner"
+
+      - name: Windows - Run tests
+        run: go test -v ./...
+        env:
+          FORGEJO_URL: ${{ env.FORGEJO_ROOT_URL }}
+          FORGEJO_RUNNER_SECRET: ${{ env.FORGEJO_RUNNER_SECRET }}
+          FORGEJO_RUNNER_HEX_SECRET: ${{ env.FORGEJO_RUNNER_SECRET }}
+
+
   release:
     runs-on: ubuntu-latest
-    needs: build
+    needs: [build, test]
     if: github.event_name == 'push' && github.ref_type == 'tag'
     steps:
       - uses: actions/download-artifact@v4