Set up automated tests and static analysis on CI

.gitattributes

@@ -0,0 +1 @@
+* text=auto eol=lf

.github/workflows/ci.yml

@@ -0,0 +1,90 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+    tags: ["**"]
+  pull_request:
+
+env:
+  DEFAULT_NODE_VERSION: 20
+
+jobs:
+  dart_tests:
+    name: "Dart tests | Dart ${{ matrix.dart_channel }} | ${{ matrix.os }} | ${{ matrix.pkg }}"
+    runs-on: "${{ matrix.os }}"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        dart_channel: [stable]
+        pkg: [sass_language_services, sass_language_server]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dart-lang/setup-dart@v1
+        with: { sdk: "${{ matrix.dart_channel }}" }
+
+      - run: dart pub get
+
+      - name: Test ${{ matrix.pkg }}
+        run: dart run test
+        working-directory: pkgs/${{ matrix.pkg }}
+
+  static_analysis:
+    name: "Static analysis  | ${{ matrix.pkg }}"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        pkg: [sass_language_services, sass_language_server]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dart-lang/setup-dart@v1
+
+      - run: dart pub get
+
+      - name: Analyze ${{ matrix.pkg }}
+        run: dart analyze --fatal-warnings --fatal-infos
+        working-directory: pkgs/${{ matrix.pkg }}
+
+  code_tests:
+    name: "VS Code tests | ${{ matrix.os }}"
+    runs-on: "${{ matrix.os }}"
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        dart_channel: [stable]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dart-lang/setup-dart@v1
+        with: { sdk: "${{ matrix.dart_channel }}" }
+
+      - run: dart pub get
+
+      - uses: actions/setup-node@v4
+        with: { node-version: "${{ env.DEFAULT_NODE_VERSION }}" }
+
+      - name: Install dependencies
+        run: npm clean-install
+        working-directory: extension
+
+      - name: Run extension tests in simulated X environment
+        run: xvfb-run -a npm run test
+        if: runner.os == 'Linux'
+        working-directory: extension
+
+      - name: Run extension tests
+        run: npm run test
+        if: runner.os != 'Linux'
+        working-directory: extension

.gitignore

@@ -20,6 +20,8 @@
 sass-language-server
 
 # Don't commit the following in the extensions folder
+.vscode-test
 dist
 node_modules
+!extension/test/**/node_modules
 *.vsix

docs/contributing/debugging.md

@@ -42,6 +42,26 @@ Assuming you installed [Dart for Visual Studio Code](https://marketplace.visuals
 
 Writing a test is often faster when debugging an issue with a specific language feature, and helps improve test coverage.
 
+## Debug VS Code tests
+
+To debug, add this launch configuration to `.vscode/launch.json`
+and change the path to match the test suite you're debugging.
+Place breakpoints in the test code and choose the Debug extensions
+test profile in the Run and Debug view in VS Code.
+
+```json
+{
+  "name": "Debug extension tests",
+  "type": "extensionHost",
+  "request": "launch",
+  "runtimeExecutable": "${execPath}",
+  "args": [
+    "--extensionDevelopmentPath=${workspaceFolder}/extension",
+    "--extensionTestsPath=${workspaceFolder}/extension/test/electron/document-links/index"
+  ]
+}
+```
+
 ## Testing in isolation
 
 VS Code ships with some built-in support for SCSS and CSS. To test this language server in isolation you can disable the built-in extension.

extension/.npmrc

@@ -0,0 +1 @@
+save-exact=true

extension/README.md

@@ -1,6 +1,6 @@
 # Sass for Visual Studio Code
 
-This extension requires you install [`sass-language-server`](https://github.com/wkillerud/dart-sass-language-server/tree/main/pkgs/sass_language_server). The extension will not work without it. <!-- Go for VS Code has a check for missing tools and an install helper, for inspiration. -->
+This extension requires you install [`sass-language-server`](https://github.com/sass/dart-sass-language-server/tree/main/pkgs/sass_language_server). The extension will not work without it. <!-- Go for VS Code has a check for missing tools and an install helper, for inspiration. -->
 
 <!-- Not quite there yet
 ## Recommended settings
@@ -14,4 +14,4 @@ We recommend you turn off the built-in CSS/SCSS/Less language extension.
 
 ## Changelog
 
-Visit the [release section on GitHub](https://github.com/wkillerud/dart-sass-language-server/releases) to see what has changed.
+Visit the [release section on GitHub](https://github.com/sass/dart-sass-language-server/releases) to see what has changed.