Add tests for AST parsers

Author: xingrz

.github/workflows/build.yml

@@ -17,14 +17,14 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '22'
           cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
 
-      - name: Lint
-        run: npm run lint
+      - name: Lint & Test
+        run: npm run lint && npm run test
 
       - name: Build
         run: npm run build