ci: add a test task that includes a few basic tests

.github/workflows/tests.yml

@@ -0,0 +1,50 @@
+name: Tests
+
+on:
+  push
+
+jobs:
+  test:
+    name: Lint, Build & Test
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x, 22.x]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint code
+        run: |
+          echo "🔍 Running ESLint..."
+          npm run lint
+
+      - name: Compile TypeScript
+        run: |
+          echo "📦 Compiling TypeScript..."
+          sh package.sh
+
+      - name: Verify compiled output exists
+        run: |
+          echo "✅ Checking compiled output..."
+          if [ ! -f "out/extension.js" ]; then
+            echo "❌ Error: out/extension.js not found after compilation!"
+            exit 1
+          fi
+          echo "✅ Compiled output verified"
+
+      - name: Run tests
+        run: |
+          echo "🧪 Running test suite..."
+          xvfb-run -a npm run test

src/test/extension.test.ts

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+import * as assert from 'assert';
+import * as vscode from 'vscode';
+
+suite('Jule Extension Test Suite', () => {
+  vscode.window.showInformationMessage('Start all tests.');
+
+  test('Extension should be present', () => {
+    const ext = vscode.extensions.getExtension('julelang.jule');
+    assert.ok(ext, 'Extension should be installed');
+  });
+
+  test('Extension should activate', async () => {
+    const ext = vscode.extensions.getExtension('julelang.jule');
+    assert.ok(ext, 'Extension should exist');
+
+    if (ext && !ext.isActive) {
+      await ext.activate();
+    }
+
+    assert.ok(ext?.isActive, 'Extension should be activated');
+  });
+
+  test('Jule language should be registered', async () => {
+    const languages = await vscode.languages.getLanguages();
+    assert.ok(
+      languages.includes('jule'),
+      'Jule language should be registered'
+    );
+  });
+
+  test('Jule Module language should be registered', async () => {
+    const languages = await vscode.languages.getLanguages();
+    assert.ok(
+      languages.includes('julemod'),
+      'Jule Module language should be registered'
+    );
+  });
+
+  test('jule.version command should be registered', async () => {
+    const commands = await vscode.commands.getCommands();
+    assert.ok(
+      commands.includes('jule.version'),
+      'jule.version command should be registered'
+    );
+  });
+
+  test('.jule files should use jule language', async () => {
+    const languages = await vscode.languages.getLanguages();
+    assert.ok(
+      languages.includes('jule'),
+      'jule language should be available for .jule files'
+    );
+  });
+
+  test('Jule syntax highlighting should be configured', async () => {
+    const ext = vscode.extensions.getExtension('julelang.jule');
+    const grammars = ext?.packageJSON.contributes?.grammars;
+
+    assert.ok(grammars, 'Grammars should be defined');
+    assert.ok(
+      grammars.some((g: any) => g.language === 'jule'),
+      'Jule grammar should be defined'
+    );
+  });
+
+  test('Module syntax highlighting should be configured', async () => {
+    const ext = vscode.extensions.getExtension('julelang.jule');
+    const grammars = ext?.packageJSON.contributes?.grammars;
+
+    assert.ok(grammars, 'Grammars should be defined');
+    assert.ok(
+      grammars.some((g: any) => g.language === 'julemod'),
+      'Module grammar should be defined'
+    );
+  });
+
+  test('Snippets should be available', async () => {
+    const ext = vscode.extensions.getExtension('julelang.jule');
+    const snippets = ext?.packageJSON.contributes?.snippets;
+
+    assert.ok(snippets, 'Snippets should be defined');
+    assert.ok(
+      snippets.some((s: any) => s.language === 'jule'),
+      'Jule snippets should be defined'
+    );
+  });
+});

src/test/runTest.ts

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+import * as path from 'path';
+import { runTests } from '@vscode/test-electron';
+
+async function main() {
+  try {
+    // The folder containing the Extension Manifest package.json
+    // Passed to `--extensionDevelopmentPath`
+    const extensionDevelopmentPath = path.resolve(__dirname, '../../');
+
+    // The path to test runner
+    // Passed to --extensionTestsPath
+    const extensionTestsPath = path.resolve(__dirname, './extension.test');
+
+    // Download VS Code, unzip it and run the integration test
+    await runTests({
+      extensionDevelopmentPath,
+      extensionTestsPath,
+      launchArgs: ['--disable-extensions'],
+    });
+  } catch (err) {
+    console.error('Failed to run tests');
+    process.exit(1);
+  }
+}
+
+main();