chore: also run tests for minimum supported version

.github/workflows/node.js.yml

@@ -10,16 +10,44 @@ on:
     branches: [ master ]
 
 jobs:
-  build:
+  configure:
+    runs-on: ubuntu-latest
+    outputs:
+      minimum-version: ${{ steps.minver.outputs.version }}
+    steps:
+    - uses: actions/checkout@v4
+    - name: Read package.json
+      id: package
+      # Reads the contents of `pacakge.json` into `steps.package.outputs.content`
+      run: |
+        content=`cat ./package.json`
+        content="${content//'%'/'%25'}"
+        content="${content//$'\n'/'%0A'}"
+        content="${content//$'\r'/'%0D'}"
+        echo "::set-output name=content::$content"
+    - name: Extract minimum version
+      id: minver
+      # Reads the contents of the `engines.vscode` field into `steps.minver.outputs.version` with the leading ^ removed.
+      run: |
+        version=${{ fromJson(steps.package.outputs.content).engines.vscode }}
+        version=${version#^}
+        echo "::set-output name=version::$version"
 
+  check:
     runs-on: ubuntu-latest
+    needs: configure
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x]
+        vscode-version:
+        - ${{ needs.configure.outputs.minimum-version }}
+        - stable
+        node-version:
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+        - 18.x
+        - 20.x
 
-    steps:
+    steps: 
     - uses: actions/checkout@v4
     - uses: actions/setup-java@v4
       with:
@@ -31,7 +59,9 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - name: Install dependencies
       run: npm ci
-    - name: Run tests
+    - name: Run tests on VS Code ${{ matrix.vscode-version }}
       run: xvfb-run -a npm test
+      env: 
+        VSCODE_VERSION: ${{ matrix.vscode-version }}
     - name: Package extension
-      run: npx @vscode/vsce package
+      run: npx --yes @vscode/vsce package

.vscode-test.js

@@ -1,6 +1,14 @@
 const { defineConfig } = require('@vscode/test-cli')
 
+/**
+ * The desired version of VS Code can be optionally passed as an environment variable, for example:
+ * - `stable`
+ * - `1.80.0`
+ */
+let version = process.env.VSCODE_VERSION
+
 module.exports = defineConfig({
+  version,
   files: ['test/out/**/*.test.js'],
   workspaceFolder: 'test/testWorkspace',