Added tests.

Author: RobertJGabriel

.github/workflows/test.yml

@@ -0,0 +1,31 @@
+name: Tests
+
+on:
+  pull_request:
+    branches: [ main, master ]
+  push:
+    branches: [ main, master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    strategy:
+      matrix:
+        node-version: [16.x, 18.x, 20.x]
+    
+    steps:
+    - name: Checkout code
+      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: Run tests
+      run: npm test