Added unit tests

.github/workflows/unit-tests.yml

@@ -0,0 +1,18 @@
+name: Unit Tests
+on: push
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.ref }}
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - name: Install
+        run: npm ci
+      - name: Test
+        run: npm run test