Add GitHub action to run tests using swift-syntax-dev-utils

swift-syntax-dev-utils also runs the CodeGeneration and Examples tests. It is also a convenient place where we can enable RawSyntax validation and test fuzzing.

Running this using only the latest Swift version should be sufficient because we don't expect to find differences between versions here and expect contributors to swift-syntax to use the latests released Swift version anyway.

Author: ahoppen

.github/workflows/pull_request.yml

@@ -17,3 +17,36 @@ jobs:
       docs_check_enabled: false
       # https://github.com/swiftlang/swift-syntax/issues/2988
       format_check_enabled: false
+  test_using_swift_syntax_dev_utils_linux:
+    name: Run tests using swift-syntax-dev-utils (Linux)
+    runs-on: ubuntu-latest
+    container:
+      image: swift:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Test
+        run: "./swift-syntax-dev-utils test --enable-rawsyntax-validation --enable-test-fuzzing --toolchain /usr"
+  test_using_swift_syntax_dev_utils_windows:
+    name: Run tests using swift-syntax-dev-utils (Windows)
+    runs-on: windows-2022
+    steps:
+      - name: Pull Docker image
+        id: pull_docker_image
+        run: |
+          $Image = "swift:windowsservercore-ltsc2022"
+          docker pull $Image
+          echo "image=$Image" >> "$env:GITHUB_OUTPUT"
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Test
+        run: |
+          $SwiftPath = where.exe swift
+          swift run --package-path "C:\Source\SwiftSyntaxDevUtils" swift-syntax-dev-utils test --enable-rawsyntax-validation --enable-test-fuzzing --toolchain "$SwiftPath\..\.."
+          if ($LastExitCode -ne 0) {
+            exit $LastExitCode
+          }