Run tests on CI

.github/workflows/tests.yml

@@ -0,0 +1,23 @@
+name: photon
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [ 18 ]
+    name: tests
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node }}
+      - run: npm i
+      - run: npm test

package.json

@@ -27,6 +27,7 @@
     "webpack-cli": "^4.10.0"
   },
   "scripts": {
-    "build": "npm exec webpack"
+    "build": "npm exec webpack",
+    "test": "npm exec jest -- test"
   }
 }